nomit vyas
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694 detections
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Detects the execution of the LANDFALL spyware's SELinux policy manipulation helper (`l.so`). The spyware's loader (`b.so`) sets a `PRELOAD_PATH` environment variable pointing to `l.so` and uses `LD_PRELOAD` to inject another payload into the benign `/system/bin/id` process. This behavior is specific to the "interactive" execution mode of the spyware.
Detects the creation or modification of a large file named 'logs.dat' (100KB or greater) within common user-related directories such as AppData, Temp, Users, or Documents. This pattern can indicate data staging for exfiltration, where an adversary collects sensitive information into a single file before attempting to move it off the system.
Detects the creation or modification of an email compliance or forwarding rule containing the specific typo "Patroit". This indicator is associated with the UNC6508 threat actor's data exfiltration activities via silently BCC-forwarding sensitive emails.
Detects the unique PowerShell de-obfuscation sequence used by ErrTraffic ClickFix lures to drop follow-on payloads. Specifically, it looks for PowerShell command or script block execution events containing the string patterns "-bxor[int][char]$" and "[convert]::ToInt32", which are indicative of the custom XOR decryption and type conversion methods employed by this malware distribution framework.
Detects command line activity attempting to push, commit, or create repositories containing specific Miasma exfiltration signatures, which are associated with the Shai-Hulud malware variant. This rule looks for distinct string patterns in process command lines indicating the use of these signatures for data exfiltration to code repositories.
Detects the obfuscated 'setup.cjs' dropper associated with the easy-day-js npm supply chain attack. The rule identifies unique obfuscated variable names, XOR-encoded marker bytes, and specific campaign-related strings, including postinstall commands, package names, second-stage payload filenames, self-deletion patterns, and TLS bypass indicators.
Jellyfin Ffprobe Exploit
YARA-L
Detects Jellyfin's automated ffprobe media scan pipeline spawning suspicious network-related shell commands. This indicates active exploitation of the PixelSmash vulnerability (CVE-2026-8461) via zero-click library scans.
This rule detects potentially malicious shell execution (e.g., bash -i, /dev/tcp/ reverse shells, netcat) spawned directly or indirectly by common media processing applications such as ffmpeg, ffprobe, jellyfin, or nextcloud. It identifies when these applications initiate shell processes or execute command lines that exhibit suspicious behavior or access specific media-related paths commonly targeted for abuse.
Detects potential process impersonation by monitoring for suspicious named pipe creation followed by system-level process spawning.
Detects the creation of scheduled tasks at 1-minute intervals using 'schtasks.exe' that employ masqueraded names (e.g., MicrosoftUserInterface) or execute known suspicious payloads associated with the NarwhalRAT malware (e.g., python scripts or .cat files). This behavior is characteristic of persistence mechanisms used by APT37.
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