Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the creation of a 'WSPrint' scheduled task followed by deletion of its Security Descriptor (SD) registry value. Deleting the SD value hides the task from schtasks /query and Task Scheduler. This technique is used by UAT-9244 for stealthy persistence and is also associated with HAFNIUM/Tarrask.
KQL Query from file: Ottercookie Detection
This analytic detects a process attempting to delete or modify a scheduled task's Security Descriptor (SD) from its registry path. This activity is significant as it may indicate an attempt to remove evidence of a scheduled task for defense evasion. If confirmed malicious, it suggests an attacker with privileged access trying to hide their tracks, potentially compromising system integrity and security. Immediate investigation is required.
This rule detects the deletion of the 'SD' (Security Descriptor) value within the `\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\` registry hive. This action is typically performed by adversaries to hide scheduled tasks, making them less visible to standard enumeration tools. This technique has been observed in use by the Tarrask malware.
This rule detects the TaRRaK ransomware based on specific bytecode patterns. The patterns indicate functionality related to finding and encrypting files, changing the desktop background, and dropping a ransom note. The rule specifically targets MSIL (Microsoft Intermediate Language) bytecode, suggesting it's designed for .NET executables.
