All news with #defense evasion tag

🔍 ROADtools is an open-source Python toolkit for red teams and researchers that attackers have repurposed to target Microsoft Entra ID. It enumerates tenants, registers devices, and acquires or manipulates OAuth2/OpenID Connect tokens while using legitimate Microsoft APIs and configurable request attributes to evade detection. Nation-state actors have used ROADtools for discovery, persistence and defense evasion, and Palo Alto Networks outlines detection queries, mitigation recommendations and protections available via Cortex Cloud, Cortex XDR and Unit 42 services.

🔒 Fox Tempest operated a malware-signing-as-a-service that abused Microsoft Artifact Signing to generate short-lived fraudulent code-signing certificates, allowing signed malware to bypass controls. Microsoft tracked the actor since September 2025 and disrupted the MSaaS in May 2026, revoking over one thousand certificates and targeting the infrastructure. The group used hundreds of Azure tenants, preconfigured VMs on Cloudzy, and charged customers thousands for signing malicious binaries; Microsoft provides detections, IOCs, and mitigations to help defenders respond.

🛡️ Bitdefender reports that Microsoft’s MSHTA (Microsoft HTML Application Host), a remnant from Internet Explorer, is actively abused as a living-off-the-land binary in ongoing malware campaigns. Attackers use it to execute obfuscated HTA content, launch PowerShell, and fetch loaders and stealers such as CountLoader, LummaStealer, Amatera and PurpleFox. Campaigns rely on fake downloads, cracked apps, SEO-poisoned pages and Discord phishing to trick victims into executing payloads. Because MSHTA is Microsoft-signed and preinstalled, it remains implicitly trusted and attractive to adversaries.

🔒 Microsoft will change Edge so saved passwords are not loaded into process memory in clear text at startup. Security researcher Tom Jøran Sønstebyseter Rønning disclosed on May 4 that Edge decrypted all stored credentials at launch and released a proof-of-concept showing how attackers with Administrator privileges could dump other users' passwords. Microsoft initially described the behavior as "by design" but now says a defense-in-depth change will roll out across Stable, Beta, Dev, Canary and Extended Stable; the fix is live in Canary and will be in build 148 and newer.

🔒 Two former hosting-company employees allegedly deleted dozens of customer and federal databases after being fired; one brother was convicted on computer-fraud and related charges. Investigators say one used a public AI chatbot to ask how to clear SQL and Windows logs, aiding evidence destruction. Experts warn this underscores failures in off-boarding and privileged access controls and call for stronger AI guardrails and real-time revocation.

🛡️ReliaQuest researchers observed ClickFix intrusions that now leverage the open-source proxy PySoxy to establish a secondary encrypted C2 path alongside an initial PowerShell controller. The April campaign used scheduled tasks for persistence and deployed Python tooling to C:\ProgramData to execute compiled .pyc modules, turning endpoints into proxy relays. This dual-channel design preserves access if the PowerShell channel is disrupted, forcing broader containment and new hunting approaches.

🛡️Researchers at Ontinue warn that attackers are impersonating Anthropic’s Claude Code installer to deploy a previously undocumented PowerShell loader that evades detection and extracts browser encryption material. The campaign swaps the legitimate one-line install command for an attacker-controlled PowerShell chain, establishing stealthy persistence and exfiltration. It also abuses Chrome’s IElevator2 elevation interface to recover Application-Bound Encryption (ABE) keys introduced in Chrome 127.

🐍 Securonix has identified a stealthy Python-based backdoor, Deep#Door, that uses an obfuscated batch loader to install a persistent implant on Windows systems. The self-contained dropper embeds and reconstructs its Python payload at runtime, disables security controls such as Windows Defender, and leverages multiple persistence mechanisms to maintain access. It uses public TCP tunneling for C2 and supports credential theft, keylogging, media capture and optional destructive actions, complicating detection and remediation.

🔍 Flare researchers examined a recent forum post in which a threat actor details a structured OPSEC framework aimed at sustaining high-volume carding operations while avoiding detection. The actor prescribes a three-tier architecture—public, operational, and extraction layers—with strict identity compartmentalization, residential IP rotation, and isolated cashout channels. The post highlights recurring failures like identity reuse, metadata leakage, and weak anti-fingerprinting, and recommends resilience measures such as time-delayed triggers and dead man's switches. For defenders, it underscores the need to link cross-platform identities, evolve behavioral detection, and monitor the full attack chain.

🔍 Cisco Talos research (published 21 April) details how attackers are repurposing native macOS features to execute code, move laterally and evade detection across enterprise environments. Built-in capabilities such as Remote Application Scripting (RAS), Spotlight metadata and AppleScript can be abused to run commands, hide payloads and perform covert data transfer. The findings show gaps in visibility and recommend shifting to process-lineage analysis and tighter MDM controls to reduce exposure.

🔐 Check Point researchers report that The Gentlemen, a ransomware-as-a-service operation first identified in mid-2025, has claimed over 320 victims with the majority of attacks occurring in early 2026. Affiliates are supplied with cross-platform ransomware written in Go for Windows, Linux, NAS and BSD, plus a C-based ESXi encryptor. The toolkit enables automated lateral movement, Group Policy deployment and credential reuse to achieve rapid, domain-wide encryption, and incidents frequently show defense evasion and post-exploitation tools such as SystemBC and Cobalt Strike.

🔐 Talos demonstrates how adversaries can repurpose legitimate macOS features to achieve remote execution and lateral movement across enterprise fleets. By weaponizing Remote Application Scripting (RAE) and abusing Spotlight Finder comments as a staging area, attackers can bypass static file analysis and traditional SSH-focused telemetry. The research validates multiple native transfer channels—including SMB, netcat, Git, TFTP, and SNMP—and urges defenders to emphasize process lineage, IPC anomalies, and strict MDM controls.

🛡️ Researchers report the Payouts King ransomware is leveraging QEMU as a covert reverse SSH backdoor, running hidden Alpine Linux VMs to execute tools and bypass host security. Operators create a scheduled task named TPMProfiler to launch the VM as SYSTEM, use virtual disks disguised as benign files, and forward ports for remote access. The campaign—linked to STAC4713 and observed alongside a separate STAC3725 activity exploiting CitrixBleed 2—employs credential theft, robust obfuscation, and AES-256/RSA-4096 encryption. Sophos recommends hunting for unauthorized QEMU installs, suspicious SYSTEM tasks, and unusual SSH tunnels.

🔒 Huntress researchers uncovered a digitally signed adware campaign that deployed SYSTEM‑privilege payloads to disable antivirus protections on thousands of endpoints. The binaries, signed by Dragon Boss Solutions LLC and bundled in browser-like PUPs such as Chromstera and WorldWideWeb, used an Advanced Installer MSI to drop a PowerShell script, ClockRemoval.ps1, which stops services, uninstalls AVs, edits the hosts file and persists via WMI and scheduled tasks. After registering the operator’s unclaimed update domain, Huntress sinkholed infrastructure and observed over 23,500 infected hosts checking in across 124 countries, including hundreds in high-value networks. Administrators are urged to search for specific WMI subscriptions, scheduled tasks, blocked vendor domains in hosts, and processes signed by the publisher.

⚠️ Huntress has identified a signed adware operation linked to Dragon Boss Solutions LLC that has disabled antivirus products on approximately 23,565 endpoints worldwide. The campaign leverages a legitimate code‑signing certificate and an MSI update mechanism to deploy a PowerShell payload, ClockRemoval.ps1, which systematically kills, uninstalls and blocks reinstallation of AVs. Targets include Malwarebytes, Kaspersky, McAfee and ESET, and persistence is maintained via scheduled tasks and WMI event subscriptions. Researchers sinkholed an unregistered update domain and observed infections across 124 countries, including universities, utilities and government networks.

🔐 eSentire's Threat Response Unit identified a previously undocumented remote access trojan, STX RAT, after an attempted deployment in a financial services environment in late February 2026. The malware uses multi-stage, script-based delivery and in-memory execution to evade detection, leveraging XXTEA encryption, Zlib compression and reflective PowerShell loaders. It delays credential theft until instructed by an encrypted C2 channel and implements registry autoruns and COM hijacking for persistence. Organizations should strengthen endpoint protections and limit exposure to script-based attack vectors.

🔐 Lumen's Black Lotus Labs and Microsoft linked a campaign named FrostArmada to APT28 (aka Forest Blizzard), which compromised insecure MikroTik and TP‑Link SOHO routers to change DNS settings and route traffic to attacker-controlled resolvers. The actors used DNS hijacking to perform passive reconnaissance and attacker-in-the-middle (AitM) operations to harvest passwords, OAuth tokens, and other credentials without user interaction. The malicious infrastructure has been disrupted in a multi‑agency operation led by the U.S. Department of Justice and FBI with international partners.

🔒 Cisco Talos and Trend Micro say Qilin and Warlock ransomware groups have adopted a bring-your-own vulnerable driver (BYOVD) approach to disable endpoint security on compromised hosts. Talos identified a malicious DLL named msimg32.dll that side-loads a PE loader which decrypts and executes an in-memory EDR killer. The payload leverages renamed drivers such as rwdrv.sys (a repackaged ThrottleStop.sys) and hlpdrv.sys to access physical memory and terminate over 300 EDR drivers. Warlock has similarly used NSecKrnl.sys and a suite of legitimate tools to persist, move laterally, and exfiltrate data.

🍪 Microsoft Defender Security Research Team warns that threat actors are increasingly using HTTP cookies as a covert control channel for PHP-based web shells on Linux servers. Instead of passing commands via URL parameters or request bodies, attackers gate execution and convey instructions through values accessible in the PHP $_COOKIE superglobal. This technique keeps malicious code dormant during normal application activity and activates only when specific cookie values are present, reducing observable indicators. Microsoft observed multiple obfuscated loaders and a cron-driven 'self-healing' persistence model that recreates loaders and minimizes forensic visibility.

🔒 Threat actors are increasingly abusing HTTP cookies as a stealthy control channel for PHP webshells on Linux hosting platforms. By gating execution on specific cookie values, attackers keep loaders dormant during normal traffic and activate functionality only when exact cookie conditions are met. Variants range from multi-stage loaders that reconstruct functions at runtime to single-file interactive shells, often using base64 reconstruction and layered obfuscation to evade detection. Review Microsoft Defender guidance to detect, hunt, and mitigate these threats.