Ibrahim Saud
@tektrixIndiaCompletionist
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Detects sandbox evasion techniques used by the Gamaredon group's PteroSand malware. The rule monitors for WMI queries against system artifacts (Win32_ComputerSystem, Win32_BIOS, or Win32_VideoController) searching for virtualization-related strings (vmware, vbox, etc.), followed by a mandatory sleep/timeout delay of at least 60 seconds, and concludes by identifying the subsequent execution of a new process within the same lineage.
Detects the exploit chain for CVE-2026-43503, an unprivileged kernel exploitation vulnerability. The rule identifies the creation of user and network namespaces by non-root users, followed by the manipulation of XFRM states or policies, and the subsequent loading of ESP kernel modules, which together facilitate privilege escalation.
This rule detects post-execution activity associated with the lambsys/isp.sh cryptominer campaign. It triggers when a known miner binary (lambsys, procq, or isp.sh) is executed, followed within 3 minutes by suspicious cleanup operations including the deletion of log files (wtmp, btmp, system logs), staging directories, or tampering with command history files and shell environment variables.
This rule detects suspicious manipulation of Linux namespaces using the 'unshare' utility or manual modification of user ID mapping files ('uid_map', 'gid_map', 'setgroups') in '/proc/self/'. Such activities are characteristic of container escape attempts or privilege escalation, where an attacker seeks to gain root access on the host or map unprivileged users to privileged IDs within a new namespace.
Detects the execution of PowerShell with encoded commands initiated by common office applications (e.g., WinWord, Excel) or scripting engines (e.g., wscript, mshta). The rule specifically targets command lines longer than 200 characters that are not digitally signed by Microsoft, often indicating obfuscated malicious payloads intended to evade detection.
Detects potential Browser-in-the-Middle (BitM) phishing activity by identifying a client browser that fetches the 'rrweb' session-recording library followed by a WebSocket connection to a different origin within 5 minutes. This sequence is indicative of an attacker-controlled browser streaming the victim's DOM and interaction events to a phishing infrastructure.
This rule monitors network traffic for DNS queries directed at domains associated with known malicious browser extensions, specifically targeting Adblock for YouTube and Adblock for Chrome malicious variants. It correlates these connections with process command line evidence that matches the extension IDs of these malicious components.
Detects MFA authentication success from one IP address followed immediately by a session access attempt from a different IP address. This pattern is characteristic of Adversary-in-the-Middle (AiTM) phishing attacks, such as those using EvilProxy, Evilginx2, or similar phishing-as-a-service (PhaaS) platforms, where an adversary proxies the authentication flow to capture session tokens.
Detects web traffic containing specific randomized CSS filter properties on top-level elements, frequently seen in Bluekit PhaaS toolkits. These properties are used to alter the visual hash of the rendered page, complicating automated screenshot or pixel-based analysis by security vendors. This technique is often combined with suspicious URL patterns indicative of credential harvesting sites.
Detects browser-based WebRTC STUN traffic initiated from phishing landing pages used by the Bluekit PhaaS platform. The rule identifies suspicious STUN requests originating from browsers that exhibit a WebRTC IP mismatch when compared to the active HTTPS session IP, a technique used by attackers to de-anonymize security researchers and bypass automated analysis sandboxes.
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