Ibrahim Saud
@tektrixIndiaCompletionist
2 followers18,458 downloads7,120 copies47 likes38,567 views
11,679 detections
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Detects the use of legitimate Windows administrative utilities (vssadmin.exe, wmic.exe, wbadmin.exe) to delete volume shadow copies or backup catalogs. This behavior is a common tactic employed by ransomware actors to inhibit system recovery and prevent restoration of encrypted data.
Detects lateral movement activities involving the use of WMIC to remotely create processes or Schtasks to remotely create scheduled tasks. These techniques are often used by threat actors, including those associated with DragonForce and CRPx0 ransomware, to propagate across a network by executing commands on remote systems.
Detects the loading of rstrtmgr.dll by processes other than known Windows installers, update services, or explorers. The Restart Manager API is often abused by ransomware to terminate processes holding file locks, facilitating the encryption of files that would otherwise be in use.
Detects the execution of PowerShell encoded commands that result in the installation of known remote monitoring and management (RMM) software. This pattern is indicative of attackers, specifically those associated with Ransom Busters or similar affiliates, establishing persistent remote access to compromised systems.
Detects the creation of a Windows scheduled task configured to execute as the SYSTEM account using a one-time execution trigger. This combination is frequently used by adversaries for post-exploitation activities, such as lateral movement or persistence, as it allows for a single, immediate execution of a malicious payload with high-level privileges.
Detects the execution of the SoftPerfect Network Scanner tool (netscan.exe), which is often used by adversaries for reconnaissance to identify active hosts, open ports, and services within a network.
Detects the creation or modification of Windows Scheduled Tasks involving system-level components. The rule monitors modifications to the TaskCache registry keys specifically containing 'System' or the creation of task files in the System32 directory. It excludes trusted processes like msiexec.exe and trustedinstaller.exe, which are typically responsible for legitimate system updates or installations.
Detects the execution of PowerShell or Rundll32 processes with command-line arguments that reference Anti-Malware Scan Interface (AMSI) components. This is a common indicator of an attempt to bypass or disable AMSI to facilitate the execution of malicious scripts or payloads.
Detects instances where specific suspicious or known-malicious processes load 'ntdll.dll' from the 'System32' directory. This behavior is indicative of potential DLL side-loading, process injection, or evasive execution patterns where an attacker leverages legitimate system binaries to load malicious code.
Detects HTTP POST requests directed at 'relay.php' containing a specific 'CrpxBoundary' in the request body and an 'Authorization' header with the value 'Bearer crpx0_c2_2026'. This pattern is indicative of the CRPx0 malware exfiltrating data in chunks over an established C2 channel.
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