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MOBILE Security Affairs

Malware Hijacks Android Car Head Units

Malware is abusing car infotainment updates to install proxy software, turning Android head units into nodes for the BADBOX network. Kaspersky researchers found something in June 2026 that made them stop and look twice: an Android app with no interface at all, installed like any ordinary app but making zero effort to disguise itself as legitimate. Their report documents the first known malware infection targeting car head units, the Android-based infotainment and control systems built into many modern vehicles, spread through the vehicle’s own official update mechanism. Head units run Android for practical reasons, since manufacturers can build on existing source code and add their own custom system apps during production. That flexibility cuts both ways. Because head units are just Android devices under the hood, most apps built for smartphones can technically run on them too, including malware, even though something like a banking trojan would be wasted effort on a device nobody uses for mobile banking. Kaspersky researchers found something unusual in June 2026: an Android app with no visible interface that was installed like a normal app but did not try to look legitimate. Their report describes what they say is the first known malware infection targeting car head units, Android-based systems used for infotainment and vehicle controls, delivered through the car’s official update system. “We identified new Android malware: a multi-stage downloader whose ultimate purpose is ad fraud and creation of a proxy botnet.” reads the report published by Kaspersky. “The malware spread through the built-in updaters of Android-based automotive head unit firmware. This is the first documented case of malware found on a car head unit with an infection chain specific to that type of device.” Car head units often use Android because it is flexible and lets manufacturers add their own software. But this also creates a security risk. Since these systems are basically Android devices, many apps designed for smartphones can also run on them, including malware. The infection chain here starts inside TWCore, a completely legitimate system app responsible for analytics and firmware updates on DoFun head units. An MQTT message broker sends TWCore instructions about which APK files to download and install, and a specific configuration flag called installNotExists controls whether the app checks if something is already installed before pushing it. “TWCore only checks whether an app is already installed on the device when installNotExists = false The APK file is downloaded to <TWCore external cache dir>/push/apk/ for installation.” which means setting that flag the other way turns a routine update channel into a silent installation pipeline for anything the attackers want to push. What gets installed through that channel is a small dropper called JarService, carrying zero user interface and doing nothing but decrypting and loading the next stage. That stage is a loader that phones home to a command server, reports basic device details, and receives a download link for the actual payload, a third-stage module researchers found could be pulled in at least seven different versions simply by trying different version numbers in the download URL. That third stage turns out to be a clicker and reverse proxy component, checking in with its server every 90 minutes by default and waiting for new instructions. “In this stage, the malware sends a POST request to /cpc/api/task every 90 minutes by default, containing information about the infected device (display resolution, device model, the SSID of the connected Wi-Fi network, MAC address, and so on) along with the Trojan’s configuration version.” continues the report. “If the configuration is outdated, the C2 server returns an updated configuration containing new C2 addresses and new paths for sending HTTP requests.” The command system behind the malware is more powerful than you might expect from something running silently on a car’s dashboard. Researchers found nine commands, including ones that can change the clipboard, send HTTP requests, load web pages, and run JavaScript. In practice, attackers mainly used two: one to download and run new code, and another to send web requests. The extra module they deployed, called “zhima,” was a reverse proxy. This means the main goal was not to attack or control the car. Instead, the attackers wanted to use infected cars’ internet connections as part of a larger proxy network. Tracing the malware’s naming conventions and infrastructure led researchers to attribute the campaign, with high confidence, to MoYu Group, an actor connected to the BADBOX botnet that’s been documented previously by other researchers. A thread inside the second-stage loader carried the internal name “mosdk-host-loader,” which pointed toward malware previously found on TV set-top boxes tied to the same group, and overlapping network infrastructure independently spotted by a separate research team around the same time backed up the connection. The command system behind the malware is more powerful than you might expect from something running silently on a car’s dashboard. Researchers found nine commands, including ones that can change the clipboard, send HTTP requests, load web pages, and run JavaScript. In practice, attackers mainly used two: one to download and run new code, and another to send web requests. The extra module they deployed, called “zhima,” was a reverse proxy. This means the main goal was not to attack or control the car. Instead, the attackers wanted to use infected cars’ internet connections as part of a larger proxy network. There is also a strange detail in the network’s infrastructure. The proxy service’s admin panel allows people to create accounts if they have a valid invite code. Its copyright text and login page also look similar to those used by at least two commercial residential-proxy services. This suggests the network may be linked to a business-like proxy service, while also using infected cars to provide internet connections. BADBOX has survived several takedown attempts by researchers and law enforcement. This campaign shows why: the people behind it keep changing how they spread the malware and are moving into new types of devices. Cars are now joining smart TVs and set-top boxes as devices that can be quietly added to a botnet. As cars become more like computers, they also need the same kind of security protection. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, Android Car)

Aug 22, 2026, 08:55 AM Read more →
WEBAPP Security Affairs

Critical Flaw in NASA/JPL Open-Source Spacecraft Command Software Allowed Unauthenticated Command Execution

A critical flaw (CVSS 9.4) in NASA/JPL’s AIT-GUI let anyone send unauthenticated commands to spacecraft instruments. Cycode researchers found that AIT-GUI, the browser-based operator console in NASA/JPL open-source AMMOS Instrument Toolkit, shipped with no authentication, no session checks, and no CSRF protection on any of its state-changing endpoints. “AIT-GUI, the web front end of NASA/JPL’s open-source AMMOS Instrument Toolkit, starts an HTTP server with no authentication, no authorization, and no CSRF protection on any of its state-changing endpoints.” reads the report published by Cycode. “Anyone who can reach the port, or any website an operator merely visits in a browser, can: Issue arbitrary commands via POST /cmd Run server-side scripts via POST /script/run Execute command sequences via POST /seq“ The vulnerability is tracked as GHSA-p9r8-2q67-fp86, rated Critical (CVSS score of 9.4), and fixed in AIT-GUI 2.5.2. AMMOS (Advanced Multi-Mission Operations System) is an open-source framework used by NASA/JPL and other missions to control spacecraft and instruments, send commands, and process the data they send back. AIT-GUI is the web interface operators use to do this in real time. Sending a command through this software is not like filling out a simple online form. The vulnerability isn’t one thing. It’s four ordinary web weaknesses that compose into something with unusual consequences. The first is that the server reads its configured host setting into a variable and then ignores it, binding instead to 0.0.0.0, which means all network interfaces. An operator who sets host: localhost to keep the console on the loopback gets a server exposed to the entire reachable network anyway. The second and third weaknesses follow from the first. There’s no login requirement, no session gate, no CSRF token, and no cross-origin restriction on any route. POST /cmd takes whatever arrives in the command field, parses it, and hands it directly to the command bus: no check, no validation, nothing between the network and the hardware. The fourth weakness lives on POST /seq and POST /script/run, which build filesystem paths by joining raw user input onto a root directory with no confinement. A seqfile value of ../../../../something resolves outside the intended sequence directory. The researchers note that the correct confinement check already exists in the same codebase, on a sibling route called /scripts/load; the safe pattern was already written, just not applied consistently. The CSRF risk is especially serious because a firewall does not stop it. Browsers can send certain form requests from another website without first checking with the target site. So, if an operator opens a malicious page in the same browser they use for the console, it could send commands such as POST /cmd, POST /seq, or POST /script/run. The attacker does not need direct access to the system or its network port—they only need the operator to open a malicious link. Cycode’s research team used a combination of AI-assisted code analysis and human validation to find and confirm the issues. The AI handled the initial codebase review, flagging recognizable patterns: state-changing routes with no auth anywhere in their call path, user input flowing from a request parameter into a subprocess call without sanitization, and a configuration value that was read and then silently discarded. The human researcher then confirmed each pattern was exploitable and reduced each to a working proof-of-concept, including a self-contained CSRF demonstration that drove a real headless browser and recorded zero network preflights. That second step matters. A pattern match points to a candidate; a reproduced exploit confirms the finding is real. Cycode says explicitly it only reports the second kind. “More broadly: operational and ground-system software inherits the same web weaknesses as everything else, but with a far higher cost of failure. Auth, CSRF defense, and input confinement are not optional extras on a panel that commands hardware.” concludes the report. The fix is in AIT-GUI 2.5.2. Operators should upgrade immediately and verify the console port is not reachable from untrusted networks. Anyone who ran an exposed instance before the patch should treat it as a reason to audit command and sequence history, since an unauthenticated POST leaves no user-level trace by design. Maintainers hardening deployments should add authentication and CSRF protection to the command, script, and sequence routes; bind the server to the configured host instead of 0.0.0.0; and apply the existing path-confinement logic from /scripts/load to /seq and /script/run. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, NASA/JPL)

Aug 22, 2026, 08:04 AM Read more →
OS Security Affairs CVE-2026-73570 ↗

U.S. CISA adds Zimbra Collaboration Suite (ZCS) flaw to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Zimbra Collaboration Suite (ZCS) flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the Zimbra Collaboration Suite (ZCS) flaw CVE-2026-73570 to its Known Exploited Vulnerabilities (KEV) catalog. CERT Polska, Poland’s national computer emergency response team, confirmed this week that threat actors are actively exploiting the critical vulnerability in Zimbra Collaboration Suite. The flaw allows unauthenticated remote code execution and was patched less than a month ago. “The CERT Polska team informs about an actively exploited OS Command Injection vulnerability in Zimbra Collaboration Suite.” reads the advisory published by CERT Polska. “The vulnerability, identified as CVE-2026-73570 , allows an unauthenticated attacker to execute arbitrary shell commands with the privileges of the zimbra user . The vulnerability affects instances that have the SNMP trap service enabled via the  snmp_notify parameter  and the swatchdog service running (enabled by default).” The vulnerability affects systems with SNMP trap notifications enabled and the swatchdog service running, which is enabled by default. The technical root cause is a sanitization failure in the SNMP monitoring component. Zimbra released version 10.1.20 on 20 July 2026 to address the issue. The fix came 28 days before active exploitation was confirmed, which is not a wide window, but apparently wide enough. The attack surface only exists when the optional zimbra-snmp package is installed and SNMP notifications are active, but swatchdog, the service that processes those notifications, is running by default on most installations. Below are recommendations by CERT Polska: “Due to the ongoing campaign exploiting this vulnerability, we recommend: verifying Zimbra logs /var/log/zimbra.log for the following entries: Service status change: <szkodliwy ładunek> changed from stopped to running Service status change: <szkodliwy ładunek> changed from running to stopped verification of files created by user zimbra in the last 30 days in the following directories: /opt/zimbra/jetty/webapps/ /opt/zimbra/jetty_base/webapps/ /tmp/ If you discover any signs of potential exploitation of this vulnerability, please contact our team immediately.” According to Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities, FCEB agencies have to address the identified vulnerabilities by the due date to protect their networks against attacks exploiting the flaws in the catalog. Experts also recommend that private organizations review the Catalog and address the vulnerabilities in their infrastructure. CISA orders federal agencies to fix the flaw by August 24, 2026. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, CISA)

Aug 22, 2026, 07:17 AM Read more →
OS Palo Alto Unit 42

Connecting the Dots: Securing the Overlooked Corners of the Software Development Lifecycle (SDLC) Supply Chain

Attackers are targeting CI/CD pipelines and developer tools instead of application code, requiring total SDLC visibility and strict security controls The post Connecting the Dots: Securing the Overlooked Corners of the Software Development Lifecycle (SDLC) Supply Chain appeared first on Unit 42.

Aug 21, 2026, 11:00 PM Read more →
OS The Hacker News

14 Trojanized npm Packages Drop RedC2 4.0 Linux Backdoor With AI-Assisted C2

Cybersecurity researchers have discovered a set of trojanized npm packages that masquerade as working calendar and streak utilities but are engineered to stealthily deliver an artificial intelligence (AI)-powered Linux implant dubbed RedC2 4.0. "When the module loads, it locates the bundled binary, marks it executable, and launches it as a detached background process," TrendAI, Trend Micro's

Aug 21, 2026, 06:53 PM Read more →
OS BleepingComputer

Microsoft blames Windows gaming issues on RGB lighting devices

Microsoft says ongoing issues causing games to crash or fail to launch after installing the August 2026 Windows updates may be caused by peripherals with RGB lighting. As Microsoft explained when it confirmed it's investigating on Wednesday, this known issue affects games like ARC Raiders, MARVEL Tōkon: Fighting Souls, and The Finals on systems running Windows 11 24H2 and 25H2. "Following the release of Windows updates on August 11, 2026 (KB5121003) and later, Microsoft received reports of issues involving inability to run games as expected," Microsoft said on the Windows release health dashboard. On impacted PCs, users are also experiencing gaming freezes, "EXCEPTION_ACCESS_VIOLATION" errors, and even unexpected system restarts. In a Thursday update, Microsoft said the gaming issues may be caused by drivers or components installed by RGB devices on affected Windows systems.

Aug 21, 2026, 02:54 PM Read more →
OS BleepingComputer

Microsoft rolls out Classic Outlook theme for New Outlook users

Microsoft has started rolling out a Classic Outlook theme for users of Outlook on the web and the New Outlook for Windows. This new Outlook theme is rolling out as part of a targeted release beginning mid-August and expected to complete by the end of September. The theme will become generally available worldwide between late September and late October. "When enabled, the setting applies coordinated changes across the Outlook experience, including visual styling, layout, typography, icons, and selected interactions," Microsoft said in a Microsoft 365 Message Center update. Once rolled out, the feature will not override any existing administrator configurations and will not automatically migrate users from classic Outlook to the new Outlook. Microsoft also added that the new user interface style will be enabled by default for some users, but they can toggle it off to switch to the standard theme from Settings > General > Appearance.

Aug 21, 2026, 01:39 PM Read more →
NETWORK Security Affairs CVE-2026-20030 ↗

Six Maximum-Severity Flaws Found in Cisco Products

Cisco patched nine critical flaws, including six rated CVSS 10.0, found during internal testing. None are known to be exploited. Cisco released another batch of security fixes for its Crosswork platforms and Secure Workload software, part of what it’s calling an ongoing internal security review, and the CVSS scores in this round are unusually severe. “As part of Cisco’s ongoing commitment to proactive security and product quality, the Cisco Crosswork engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.” reads the advisory. “These vulnerabilities were found during internal testing and are not known to be actively exploited. To assist customers in patching and to streamline the disclosure process, Cisco has grouped these issues by their underlying vulnerability class – Common Weakness Enumeration (CWE) – and assigned a single Common Vulnerabilities and Exposures Identifier (CVE ID) to each CWE grouping.” Four vulnerabilities affect Crosswork Data Gateway, Crosswork Network Controller, and Crosswork Planning, all impacting these products regardless of how they’re configured: CVE-2026-20030 (CVSS score: 10.0) – an SQL injection vulnerability that lets an attacker manipulate database queries directly. CVE-2026-20357 (CVSS score: 10.0) – a missing authentication for critical function vulnerability, meaning a sensitive operation can be triggered without ever proving who you are. CVE-2026-20358 (CVSS score: 10.0) – an external control of file system vulnerability, letting an outside actor influence which files the system reads or writes. CVE-2026-20359 (CVSS score: 9.9) – an insufficiently protected credentials vulnerability, where stored login material isn’t locked down the way it should be. Seeing three CVSS 10.0 vulnerabilities in a single Cisco advisory is unusual. The four flaws affect Crosswork 7.2.1 and earlier, and Cisco fixed them in version 7.2.1-SP. Five more vulnerabilities got patched in Cisco Secure Workload, spanning both its cloud SaaS and on-premises deployments: CVE-2026-20231 (CVSS score: 9.9) – a set of improper neutralization of special elements vulnerabilities covering command, operating system, and argument injection, essentially several different ways to smuggle unintended commands into the system. CVE-2026-20315 (CVSS score: 10.0) – a set of improper access control vulnerabilities spanning authorization, authentication, privileges, and bypasses, a broad category that generally means the system doesn’t reliably enforce who’s allowed to do what. CVE-2026-20317 (CVSS score: 10.0) – a set of improper authentication vulnerabilities covering missing authentication, authentication bypass, and reliance on untrusted inputs, another maximum-severity cluster centered on identity verification failing outright. CVE-2026-20318 (CVSS score: 9.6) – a set of improper input validation vulnerabilities spanning input validation, path traversal, and external path control, the kind of flaw that lets crafted input reach files or directories it was never meant to touch. CVE-2026-20319 (CVSS score: 7.5) – a set of improper restriction of operations within the bounds of a memory buffer vulnerabilities spanning buffer overflows and out-of-bounds writes, lower severity than the rest but still a genuine memory-safety problem. The networking giant addressed five vulnerabilities in Secure Workload Release 3.10.9.1 for the 3.10 branch and earlier, and 4.0.4.16 for the 4.0 branch. The company found these vulnerabilities during internal testing; it is not aware of attacks in the wild exploiting this issue. “The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.” conctinues the advisory. “Cisco says it found the vulnerabilities through internal security testing that also used advanced AI models.” Nobody’s reported active attacks against any of these nine flaws yet, and Cisco’s own review process caught them before an outside researcher or attacker did. If your organization runs Crosswork or Secure Workload in any configuration, this isn’t a patch to schedule for next month’s maintenance window. Perfect CVSS scores tend to attract attention fast once a vulnerability’s technical details start circulating, and Cisco’s internal discovery only buys you a head start if you actually use it. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, Cisco)

Aug 21, 2026, 12:30 PM Read more →
NETWORK BleepingComputer CVE-2026-72529 ↗

CISA orders feds to patch actively exploited TrueConf Server flaws

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) ordered U.S. federal agencies to prioritize patching two actively exploited vulnerabilities in the TrueConf Server self-hosted communications platform. TrueConf Server is designed for secure corporate messaging and video conferencing and, unlike cloud-based software like Zoom or Microsoft Teams, it operates inside an organization's local network (LAN). The most severe is a critical missing authentication security flaw (tracked as CVE-2026-72529) that allows attackers without privileges to remotely execute arbitrary scripts on unpatched servers. "A remote unauthenticated attacker connecting to TrueConf Server over 4307/TCP can invoke an undocumented critical function and execute an arbitrary script on the server," the TrueConf security team explains.

Aug 21, 2026, 12:25 PM Read more →
OS Security Affairs

Fake Conferences, OAuth and WhatsApp: Inside Russia’s New Espionage Tactics

Google tracks three Russia-linked espionage clusters using phishing and legitimate authentication tools to target researchers, diplomats and defense staff. Google’s Threat Intelligence Group tracked three separate suspected Russia-linked cyber espionage clusters. All three focus on the same thing: abusing authentication features that are supposed to protect accounts to access them instead. Threat actors target researchers, academics, government officials, think-tank analysts, and defense sector personnel across Europe and the United States. The three clusters are tracked as UNC6293, UNC7005, and UNC5976, and while they operate differently and with different tools, Google published them together for a reason. “These clusters engage in persistent, adaptive phishing campaigns, using sophisticated social engineering tactics to compromise personal accounts across multiple platforms.” reads the report published by GTIG. “Because these operations abuse legitimate authentication flows which may not immediately seem like phishing attempts to users, GTIG is raising awareness about these social engineering campaigns targeting individuals so that targets can more readily recognize malicious outreach.” UNC6293 is the oldest of the three and the most precisely attributed. Google assesses with moderate confidence that it’s a sub-cluster of ICE RELIC, the group also tracked as APT29, responsible for initial access operations. Its operations are narrow by design: typically fewer than five targets at a time, with themes built around diplomatic events and upcoming conferences. Since it was first documented in June 2025, UNC6293 has consistently impersonated US State Department officials to run app password phishing. The technique is simple but effective. The attacker convinces a target to set a specific app password on their account, one that the attacker already knows, and then uses it to log in without triggering two-factor authentication. By October 2025, UNC6293 was still reusing screenshots from its June phishing lures, including the ms.state.gov reference, while only changing the surrounding text. By June 2026, the group had added OAuth phishing. After logging in to a legitimate service, victims were asked to share a URL or “verification code,” allowing attackers to obtain valid access tokens. The trick works because the login itself is legitimate, while the attackers hide the malicious step elsewhere. UNC7005, tracked by Microsoft as STORM-2945, is a related but separate cluster first identified in February 2026. Google assesses it’s also connected to ICE RELIC, but notes it operates with lower technical sophistication and worse operational security than UNC6293. It compensates with a wider toolkit. UNC7005 runs app password phishing, device code phishing against both Microsoft and WhatsApp, malware distribution, and OAuth phishing operations, sometimes in the same month. “UNC7005 also conducts device code phishing operations for both Microsoft and WhatsApp accounts.” continues the report. “The themes of these phishing waves often involve invitations for calls with individuals from notable organizations related to the target’s field or, most recently, invitations to diplomatic events and conferences. “ The GLOBSEC conference spoof is a useful illustration of how UNC7005 works. The actor built a landing page mimicking an invitation to the legitimate GLOBSEC forum in May 2026, collected detailed registration information from targets including, not for the first time in ICE RELIC-linked operations, a wine selection for a fictional dinner, and then presented a Microsoft device code for the target to enter. The registration form still contained a reference to “Embassy security policy” rather than GLOBSEC, a leftover from the previous lure template that the actor hadn’t cleaned up. When Google flagged the page quickly, UNC7005 revised the template within days, citing “technical difficulties” to explain the change to anyone still watching. UNC7005 also used WhatsApp phishing pages to trick victims into linking their accounts to an attacker-controlled device. The fake pages offered options such as joining a call, opening an encrypted chat or downloading a file. If victims chose the call option, malicious JavaScript asked for microphone and camera access, recorded them, and sent the footage to the attackers. In late May 2026, UNC7005 ran a broader phishing wave targeting US-based academics, diplomats, and Russia researchers. The lure was a fake “Summit Companion App” to read a document supporting Ukraine. “In May and June 2026, UNC7005 conducted social engineering operations spoofing WhatsApp. The phishing pages distributed by the attacker lure targets into linking their WhatsApp accounts with an attacker controlled device in order to join a secure WhatsApp call, chat, or document share.” states the report. “The attacker also attempts multiple other methods of compromise after the device is linked.” Windows users who downloaded it received VIDAR, an off-the-shelf infostealer sold as a service that pulls saved credentials, cookies, and payment data from browsers. Mac users received ATOMIC, also known as AtomicStealer, a macOS infostealer operating the same business model. Neither is custom tooling. The actor’s email address in this operation was nearly identical to one used by UNC6293 a year earlier. The hospitality captive portal campaign, previously reported by Reliaquest and Microsoft and attributed to Midnight Blizzard, connects directly to UNC7005. Google traces the infrastructure back to April 2026: domains spoofing Microsoft authentication resources, which Google added to Safe Browsing blocklists as they appeared. By mid-July 2026, those same domains were receiving redirects from captive portals at hotels and conference centers. The IP resolution trail links the captive portal infrastructure to the GLOBSEC device code phishing operation and to ENGINELIGHT, a Go-based malware used in a separate limited UNC7005 operation in May 2026. CHERRYPIE, also known as ChocoShell, is a PowerShell infostealer that adds another interesting detail. Google found comments and code references that appear consistent with AI-generated code, suggesting the attackers may be using an LLM to develop malware. The data it targets overlaps with the commercial infostealers already used by UNC7005, leading Google to suspect that CHERRYPIE could be a customized version of a malware-as-a-service tool. UNC5976 is the third cluster and the most distinct. It focuses on military, aerospace, defense industrial base, and NGO targets, concentrating geographically on Ukraine and Armenia. Instead of residential proxies for post-compromise access, as UNC6293 and UNC7005 use, it runs dedicated infrastructure. Its OAuth phishing is more automated: the actor registers file-sharing-themed domains, creates Google Cloud projects behind them, and uses cloud-hosted scripts to collect authentication tokens from targets who log in through what looks like a Google sign-in prompt on a fake file-sharing page. Within three months of Google disrupting this infrastructure, UNC5976 had built at least twelve new domains and was already migrating toward non-Google hosting providers. In April 2026, UNC5976 also distributed HEADRUSH, a malicious Excel plugin, through a domain impersonating a Ukrainian research institute, potentially targeting a Ukrainian aerospace and imaging company. HEADRUSH eventually leads to an HTA downloader, though Google wasn’t able to recover the full infection chain. The defender challenge that runs through all three clusters is the same one Google names directly. ” The accounts these groups target are often personal, rather than corporate domain-joined accounts, creating a visibility gap for monitoring compromise from an organizational perspective. The likely use of encrypted messenger applications instead of email for initial outreach also presents a challenge to defenders hoping to track and remediate abuse.” concludes the report. “The combination of these tactics not only enables the attacker to conduct quick-turnaround exfiltration operations, but also presents opportunities for the attacker to further phish targets of interest from compromised, legitimate accounts. “ Security teams watching corporate email and endpoint telemetry won’t see the initial contact. By the time a compromised personal account starts being used to phish the target’s contacts, the original access event is already cold. Google’s practical guidance for individuals: don’t set app passwords for anyone who asks, revoke existing ones you don’t recognize, check WhatsApp’s linked devices list, and treat any OAuth authorization prompt from an unsolicited message as suspicious regardless of how polished the surrounding page looks. High-risk individuals should consider Google’s Advanced Protection Program, which blocks app password creation entirely. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, Russia)

Aug 21, 2026, 11:11 AM Read more →