Memory dumping with comsvcs.dll

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	6 Hours
Required Data	XDR Agent
ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	OS Credential Dumping (T1003), OS Credential Dumping: LSASS Memory (T1003.001)
Severity	High

Description

A process memory dump was performed using comsvcs.dll MiniDump. This method is commonly used by attackers to dump Lsass.exe (Local Security Authority Subsystem Service) process memory to a file, so they could later extract credentials from the memory dump.

Attacker's Goals

Attackers may attempt to dump the memory of sensitive processes.

Investigative actions

Check whether the executing process is benign and if this was a desired behavior as part of its normal execution flow.