Detection rules › Sigma

Potential Libvlc.DLL Sideloading

Severity
medium
Author
X__Junior
Source
upstream

Detects potential DLL sideloading of "libvlc.dll", a DLL that is legitimately used by "VLC.exe"

MITRE ATT&CK coverage

TacticTechniques
PersistenceT1574.001 Hijack Execution Flow: DLL
Privilege EscalationT1574.001 Hijack Execution Flow: DLL
Defense EvasionT1574.001 Hijack Execution Flow: DLL

Event coverage

ProviderEvent IDTitle
Sysmon7Image loaded

Stages and Predicates

Stage 1: selection

ImageLoaded|endswith: '\libvlc.dll'

Stage 2: not 1 of filter_main_vlc

or:
ImageLoaded|startswith: 'C:\Program Files (x86)\VideoLAN\VLC\'
ImageLoaded|startswith: 'C:\Program Files\VideoLAN\VLC\'

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
ImageLoadedends_with
  • \libvlc.dll
ImageLoadedstarts_with
  • C:\Program Files (x86)\VideoLAN\VLC\
  • C:\Program Files\VideoLAN\VLC\