Ibrahim Saud
@tektrixIndiaCompletionist
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Detects Git commands initiated by AI coding agent processes that perform a checkout of a specific 40-character SHA hash or a FETCH_HEAD reference. This behavior is potentially indicative of a supply chain attack where an AI plugin agent is being instructed to swap code components or load specific, potentially malicious, commit versions from a remote repository.
Detects .NET malicious payloads associated with the StealC info-stealer by identifying anti-debugging and anti-analysis routines. The rule specifically looks for the usage of System.Diagnostics.Debugger methods (IsAttached, IsLogging), native debugger presence checks (IsDebuggerPresent, CheckRemoteDebuggerPresent), and Environment.FailFast usage, often in combination with obfuscation markers like ConfuserEx.
Detects PowerShell processes executing [Reflection.Assembly]::Load to load .NET assemblies directly into memory. This behavior is commonly used by fileless loaders such as StealC to execute malicious payloads while avoiding disk-based artifacts.
Detects instances of PowerShell executing process injection techniques (such as memory allocation and remote thread creation) targeting specific legitimate processes including csc.exe, chrome.exe, msedge.exe, or SearchIndexer.exe. This activity is indicative of the StealC malware attempting to masquerade its malicious code execution within trusted system or browser processes.
Detects malicious PowerShell activity using the -ExecutionPolicy Bypass flag combined with caret obfuscation or indicators related to known malicious infrastructure used in ClickFix-style social engineering campaigns. The rule specifically monitors for attempts to download or execute configuration.ps1 from identified attacker domains and IP addresses.
Detects the execution or deployment of MeshAgent, a legitimate Remote Monitoring and Management (RMM) tool, which is often abused by adversaries to maintain persistence and command-and-control access. The rule monitors for common process names such as meshagent.exe and mvtcs.exe, as well as command-line arguments containing 'meshagent'.
Detects unauthorized processes attempting to read browser-stored sensitive files, such as 'Login Data' (credentials) and 'Cookies' (session tokens) for Google Chrome and Microsoft Edge. This activity is a common indicator of credential dumping by information stealers like StealC.
Detects the execution of reagentc.exe with the /disable flag, which is used to disable the Windows Recovery Environment (WinRE). This activity is often performed by ransomware actors prior to data encryption to prevent system recovery and hinder incident response.
Detects a successful VPN authentication event followed within 30 minutes by the execution of the MeshAgent RMM tool or its renamed variant mvtcs.exe. This behavioral pattern is associated with initial access via compromised VPN credentials followed by the deployment of remote monitoring and management (RMM) tools for persistence and command and control.
Detects the creation of a git branch with a name consisting of exactly 40 hexadecimal characters. This naming convention is a known technique used to bypass security controls such as commit-pin verification in AI coding agent plugins and other CI/CD integrations (often associated with Plugin4Shell research).
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