Detection rules › Sigma

Potential CCleanerReactivator.DLL Sideloading

Severity
medium
Author
X__Junior
Source
upstream

Detects potential DLL sideloading of "CCleanerReactivator.dll"

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: '\CCleanerReactivator.dll'

Stage 2: not 1 of filter_main_path

or:
Image|startswith: 'C:\Program Files (x86)\CCleaner\'
Image|startswith: 'C:\Program Files\CCleaner\'
Image|endswith: '\CCleanerReactivator.exe'

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
  • \CCleanerReactivator.exe
Imagestarts_with
  • C:\Program Files (x86)\CCleaner\ corpus 2 (sigma 2)
  • C:\Program Files\CCleaner\ corpus 2 (sigma 2)
ImageLoadedends_with
  • \CCleanerReactivator.dll