Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects the compiled x86/x64 fetch-decode-execute dispatch loop used by the Vidar Stealer custom VM bytecode interpreter (v2.0+). The rule identifies the structural jump-table bounds-check and computed-jump idiom that is consistent across different builds of the malware, despite randomization of opcode values and XOR keys.
Detects the execution of LNK files masquerading as PDF files through the use of double extensions (e.g., .pdf.lnk). The rule monitors for processes spawned by explorer.exe that contain '.pdf.lnk' in the command line and trigger child processes like PowerShell, CMD, WScript, or MSHTA, which are common indicators of malicious intent.
Detects network communication associated with VelvetCake C2 infrastructure, including plaintext authentication, specific inventory request commands, and session termination commands over port 12345.
Detects trojanized versions of Zoom installers that bundle legitimate application installers alongside malicious components including a VBScript persistence mechanism (OneDriveUpdateScheduler) and the VelvetCake PowerShell downloader/C2 framework.
Detects network traffic indicative of VelvetCake malware exfiltrating data. The rule specifically monitors for HTTP POST requests to 'logout.php' containing 'OKey' and 'Who' parameters, using a user agent string that includes 'WebClient', which is often associated with PowerShell-based network requests.
This rule detects suspicious PowerShell activity associated with the Lightlife RAT, specifically targeting Google Chrome's login data files to steal credentials and performing checks for the presence of cryptocurrency wallets.
Detects modifications to Group Policy Objects (GPOs) or GPO links in Active Directory, specifically targeting known malicious GPO identifiers, GPO payloads, or changes to policy versioning and linking that indicate unauthorized configuration changes for persistence or privilege escalation.
Detects multiple endpoints setting their desktop wallpaper to a common file located on a remote UNC path or containing 'sysvol'. This behavior is often indicative of GPO-based configuration for persistence or malware staging, where a malicious 'payload.jpg' is used as a cover or to deliver code via vulnerabilities in image parsing libraries.
Detects automated mailbox monitoring (mailbox access cadence) followed by searches for sensitive finance-related keywords (e.g., invoice, payment, wire, ACH). This pattern is characteristic of a 'Box Monitor' or 'Inbox Monitor' actor, which maintains persistence via API polling to exfiltrate financial information from a compromised account.
Detects evidence of account persistence and potential mailbox manipulation following an anomalous sign-in event in Google Workspace. The rule identifies suspicious post-compromise activity such as the addition of new MFA methods, new OAuth application grants, or mailbox forwarding/inbox rules, which are consistent with the reuse of captured authenticated sessions.
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