Arnold Chan
@slazTrusted contributorCompletionist
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7,555 detections
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Detects network activity associated with the 'ClickFix' campaign, specifically targeting the cdnsuicaches[.]com domain. The rules identify the initial DNS query, the subsequent TLS SNI connection, and the retrieval of malicious JavaScript containing the 'cookie-captcha-complete' overlay signature. This behavior is indicative of a browser-based social engineering attack.
Detects execution of PowerShell commands that exhibit characteristics frequently associated with malicious activity, such as reflective assembly loading, compression/decompression operations, use of specific known obfuscation markers, encoded commands, or execution originating from suspicious parent processes like explorer.exe or cmd.exe.
Detects unauthorized processes attempting to modify, create, or rename sensitive browser files (Login Data or Cookies) belonging to Google Chrome or Microsoft Edge. The rule filters out known browser processes and looks for suspicious initiating processes characterized by unsigned code or execution from common staging areas like Temp folders.
Detects known PowerShell dropper and embedded StealC payload binaries used in the ClickFix infection chain via exact SHA256 hash equality only
Detects known PowerShell dropper and embedded StealC payload binaries used in the ClickFix infection chain via exact SHA256 hash equality only
This rule monitors for suspicious PowerShell command-line activity originating from Windows Explorer (explorer.exe) or embedded within RunMRU registry modifications. It detects obfuscated or hidden command execution patterns, such as base64 encoding, the use of -EncodedCommand, Invoke-Expression, or execution policy bypass flags, which are commonly associated with malicious scripts and fileless malware execution.
This rule monitors for suspicious PowerShell command-line activity originating from Windows Explorer (explorer.exe) or embedded within RunMRU registry modifications. It detects obfuscated or hidden command execution patterns, such as base64 encoding, the use of -EncodedCommand, Invoke-Expression, or execution policy bypass flags, which are commonly associated with malicious scripts and fileless malware execution.
Detects instances where explorer.exe initiates cmd.exe with suspicious command-line patterns often associated with malicious script execution or evasion. These include caret-based obfuscation, mixed-case PowerShell invocations, or base64-like blobs, alongside indicators of common malicious file paths or execution policy bypass flags.
Detects instances where explorer.exe initiates cmd.exe with suspicious command-line patterns often associated with malicious script execution or evasion. These include caret-based obfuscation, mixed-case PowerShell invocations, or base64-like blobs, alongside indicators of common malicious file paths or execution policy bypass flags.
This rule detects instances where a process associated with a known StealC command-and-control (C2) IP address subsequently spawns a hidden cmd.exe instance. It correlates network connections to known malicious infrastructure with the creation of hidden command shells within the same device session, specifically looking for common parent processes like web browsers or system utilities.
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