SigmaHQ Detections
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6,797 detections
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Detects potential exploitation attempts targeting the Cacti Command Injection vulnerability, CVE-2022-46169. The rule looks for specific patterns in GET requests to '/remote_agent.php' with 'action=polldata' and 'poller_id=' in the query, combined with suspicious command injection payloads like 'base64 -d | /bin/bash', 'whoami', 'powershell', 'cmd', or 'wget'.
Detects the execution of renamed 'cmd', 'powershell', or 'powershell_ise' binaries to 'wermgr.exe'. This technique has been observed in the exploitation of CVE-2023-36874, where attackers disguise legitimate system binaries to evade detection.
Detects the creation of a file named "dllhost.exe" in the "C:\users\public\Documents\" directory, which has been observed as an indicator for the COLDSTEEL RAT malware.
Detects the creation of a new user profile in the Windows Registry with specific usernames ('ANONYMOUS' or '_DomainUser_') within the ProfileList, which has been observed in some variants of the COLDSTEEL RAT malware. This indicates potential persistence or privilege escalation attempts by creating a new user account.
Detects Rorschach ransomware execution activity by looking for specific system utilities being executed with a distinct command-line string ('11111111'). The utilities include bcdedit.exe, net.exe, net1.exe, netsh.exe, wevtutil.exe, and vssadmin.exe, which are commonly abused by ransomware for defense evasion, system modification, and data destruction.
Detects the 3CXDesktopApp updater downloading a known compromised version of the 3CXDesktopApp software. This rule specifically looks for the 'update.exe' process within the 3CXDesktopApp directory being executed with command-line arguments indicating an update operation for version '18.12' via HTTP, which was associated with the supply chain compromise.
Detects the creation of a remote thread from a PowerShell process (powershell.exe or pwsh.exe) into another process. This activity can be indicative of process injection techniques used by adversaries to execute malicious code or evade defenses. A filter is included to exclude known legitimate activity from CompatTelRunner.exe.
Detects Microsoft Excel loading an Add-In (.xll) file. Adversaries may use malicious Excel Add-Ins to execute arbitrary code, establish persistence, or perform other malicious activities. This rule specifically looks for the loading of '.xll' files by 'excel.exe'.
Detects the execution of PowerShell cmdlets 'Get-NetFirewallRule' or 'Show-NetFirewallRule' to enumerate local firewall rules on a host. This activity is often performed by adversaries during the discovery phase to understand network configurations and potential egress/ingress points.
Detects the use of 'curl.exe' to download files by looking for specific command-line arguments such as '-O', '--remote-name', or '--output'. This activity can indicate an adversary transferring tools or other files into a compromised environment.
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