nomit vyas
@xoxoTrusted contributorCompletionist
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694 detections
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This rule detects potential mass email collection activity over IMAP (port 143). It triggers when a client sends a 'FETCH' command followed by 'BODY[]' content at least 20 times within 60 seconds from the same source IP address. This behavior is indicative of an adversary attempting to download a large number of email bodies, which is a common method for email collection.
This rule detects outbound network connections from devices to a specific remote IP address (62.102.148.212) on a set of suspicious remote ports (37393, 45839, 38471, 12345, 4444, 5555). This pattern is indicative of potential command and control (C2) communication or data exfiltration to a known malicious endpoint.
This rule detects network connections to known IP addresses associated with FortiBleed activity, including C2, pentest labs, credential validation, and sniffer nodes. It identifies both successful connections and connection attempts.
This rule detects network communication associated with the 'easy-day-js Mastra npm Supply Chain' compromise. The first alert identifies C2 exfiltration attempts over TLS to a specific IP address (23.254.164.123) on port 443. The second alert identifies a stage-2 payload download from another specific IP address (23.254.164.92) on port 8000, specifically looking for the URI '/update/49890878'. These indicators are linked to the 'protocal.cjs' and 'setup.cjs' malware, respectively, and are part of a supply chain attack.
Detects suspicious process command lines associated with WebRTC, STUN, TURN, or ICE protocols when initiated by common web browsers (Chrome, Firefox, Opera) and having a parent process identified as 'Remcos'. This behavior could indicate the Remcos RAT attempting to establish peer-to-peer communication or exfiltrate data.
Detects a browser session that contacts an EvilTokens Device Code phishing endpoint (/api/device/status/) and then immediately navigates to onedrive.live.com, indicating the attacker backend returned status:completed and the kit executed window.location.replace to redirect the victim to OneDrive after token capture. This sequence suggests a successful device code phishing attack where the victim's credentials or tokens have been captured, and they are then redirected to a legitimate service to avoid suspicion.
This rule detects the execution of specific Python scripts associated with the 'FortiBleed' campaign. These scripts include 'spray_da.py' (domain admin password spray), 'smb_test.py' (SMB validation/lateral movement), 'spider.py' (Active Directory crawler), and 'ad_full_audit.py' (Active Directory full audit). Detection is based on the Python executable (python.exe, python3, etc.) running with these script names in the command line or as the main file executed.
This rule detects suspicious execution of VBScript or VBE files via wscript.exe or cscript.exe where the command line contains keywords commonly associated with financial documents or urgent requests. A high count of such executions within an hour from a single device is flagged to identify potential phishing attempts or malware delivery.
This rule detects potential ransomware activity by monitoring for the creation, modification, or renaming of files with the '.prinzeugen' extension. This extension is commonly associated with specific ransomware families. The rule aggregates these file events by device and time, triggering an alert if 10 or more such files are observed within an hour on a single device, indicating a bulk encryption event.
Detects suspicious process executions where 'ctfmon.exe' or 'cloudfiles.exe' are initiated by a non-SYSTEM user but contain 'SYSTEM' in their command line. This could indicate an attempt to impersonate or escalate privileges.
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