Detection rules › Sigma

MSI Installation From Web

Severity
medium
Author
Stamatis Chatzimangou
Source
upstream

Detects installation of a remote msi file from web.

MITRE ATT&CK coverage

TacticTechniques
Defense EvasionT1218 System Binary Proxy Execution, T1218.007 System Binary Proxy Execution: Msiexec

Event coverage

ProviderEvent IDTitle
MsiInstaller1040Beginning a Windows Installer transaction: %0
MsiInstaller1042Ending a Windows Installer transaction: %0

Stages and Predicates

Stage 1: selection

Data|contains: '://'
Provider_Name: MsiInstaller

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
Datamatch
  • ://
Provider_Nameeq
  • MsiInstaller corpus 4 (sigma 4)

Neighbors

Often fire together

Rules that target events appearing in the same incident timelines. They pattern-match on adjacent steps of the same TTP, so an alert from one is often paired with alerts from these. Useful for triage context and for assembling chained-detection rules.

Share event IDs (chain-detection candidates)

Rules that observe the same Windows event-ID pairs as this one. If you're authoring a multi-stage / sequence rule that spans these events, these are the existing detections that already cover one or both endpoints.