Regsvr32 Scriptlet Execution
highWindowsSingle eventexperimentalsigma.regsvr32_scriptlet_exec · v1.0.0
What it detects
Regsvr32 loading a remote/COM scriptlet (Squiblydoo)
MITRE ATT&CK mapping
- T1218.010System Binary Proxy Execution: Regsvr32· Defense Evasion
False positives and triage
Converted from Sigma; review before enabling.
The rule
Declarative YAML read by the detection engine — data, never executed. Confidence 70%. Source: rules/sigma/sigma.regsvr32_scriptlet_exec.yaml, licensed under the Detection Rule License 1.1.
id: sigma.regsvr32_scriptlet_exec
version: 1.0.0
status: experimental
severity: high
confidence: 0.7
platforms:
- windows
mitre_techniques:
- T1218.010
description: Regsvr32 loading a remote/COM scriptlet (Squiblydoo) — Sigma sample
match:
event_category: process
process_path_contains_any:
- \regsvr32.exe
command_line_contains_any:
- scrobj.dll
- /i:http
- .sct
false_positive_guidance: Converted from Sigma; review before enabling.
Adapted from the SigmaHQ rule “Regsvr32 Scriptlet Execution”, distributed under the Detection Rule License 1.1. SigmaHQ.
Related detections
Run this rule on your own logs — offline
KIROSEC runs this rule and the rest of the library over Windows, Linux, macOS and cloud audit logs on the analyst's own machine. Every alert links to the events that raised it, and nothing leaves the device.