Detection rules › Sigma

Potential DCOM InternetExplorer.Application DLL Hijack - Image Load

Severity
critical
Author
Roberto Rodriguez @Cyb3rWard0g, Open Threat Research (OTR), wagga
Source
upstream

Detects potential DLL hijack of "iertutil.dll" found in the DCOM InternetExplorer.Application Class

MITRE ATT&CK coverage

TacticTechniques
Lateral MovementT1021.002 Remote Services: SMB/Windows Admin Shares, T1021.003 Remote Services: Distributed Component Object Model

Event coverage

ProviderEvent IDTitle
Sysmon7Image loaded

Stages and Predicates

Stage 1: selection

Image|endswith: '\Internet Explorer\iexplore.exe'
ImageLoaded|endswith: '\Internet Explorer\iertutil.dll'

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
Imageends_with
  • \Internet Explorer\iexplore.exe
ImageLoadedends_with
  • \Internet Explorer\iertutil.dll