Possible code downloading from a remote host by Regsvr32

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	XDR Agent
Detector Tags	LOLBIN Execution Analytics
ATT&CK Tactic	Stealth (TA0005)
ATT&CK Technique	System Binary Proxy Execution: Regsvr32 (T1218.010)
Severity	Medium

Description

Regsvr32 may be used to fetch arbitrary code from a remote host and execute it without dropping the payload onto the disk. Known to be used for malicious purposes.

Attacker's Goals

Gain code execution on the host and evade security controls.

Investigative actions

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