Arnold Chan
@slazTrusted contributorCompletionist
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7,555 detections
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This rule detects potential malicious activity by matching endpoint file events against a known list of malicious file hashes (SHA256, SHA1, MD5) and monitoring for connections to known malicious domains or URLs.
This rule detects potential malicious activity by matching endpoint file events against a known list of malicious file hashes (SHA256, SHA1, MD5) and monitoring for connections to known malicious domains or URLs.
This rule detects potential malicious activity by matching endpoint file events against a known list of malicious file hashes (SHA256, SHA1, MD5) and monitoring for connections to known malicious domains or URLs.
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 outbound HTTP POST requests directed at a known StealC command-and-control IP address. The rule identifies suspicious beaconing behavior by looking for POST requests that lack a standard User-Agent, do not utilize common HTTP content types, and contain a request body exceeding 16 bytes, suggesting custom binary protocol usage.
Detects outbound HTTP POST requests directed at a known StealC command-and-control IP address. The rule identifies suspicious beaconing behavior by looking for POST requests that lack a standard User-Agent, do not utilize common HTTP content types, and contain a request body exceeding 16 bytes, suggesting custom binary protocol usage.
Detects network activity associated with the 'ClickFix' campaign, specifically targeting DNS queries, TLS SNI, HTTP Host headers, and direct IP connections to known malicious infrastructure domains (cdnsuicaches.com, mnl.ac) and exfiltration endpoints (23.227.198.199).
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 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.
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.
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