Detection rules › Sigma

HackTool - Certify Execution

Severity
high
Author
pH-T (Nextron Systems)
Source
upstream

Detects Certify a tool for Active Directory certificate abuse based on PE metadata characteristics and common command line arguments.

MITRE ATT&CK coverage

TacticTechniques
Credential AccessT1649 Steal or Forge Authentication Certificates

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection_img

or:
Description|contains: Certify
Image|endswith: '\Certify.exe'
OriginalFileName: Certify.exe

Stage 2: all of selection_cli_commands

or:
CommandLine|contains: '.exe cas '
CommandLine|contains: '.exe download '
CommandLine|contains: '.exe find '
CommandLine|contains: '.exe pkiobjects '
CommandLine|contains: '.exe request '

Stage 3: all of selection_cli_options

or:
CommandLine|contains: ' /altname:'
CommandLine|contains: ' /ca:'
CommandLine|contains: ' /domain:'
CommandLine|contains: ' /path:'
CommandLine|contains: ' /template:'
CommandLine|contains: ' /vulnerable'

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
CommandLinematch
  • /altname:
  • /ca:
  • /domain:
  • /path:
  • /template:
  • /vulnerable
  • .exe cas
  • .exe download
  • .exe find
  • .exe pkiobjects
  • .exe request
Descriptionmatch
  • Certify
Imageends_with
  • \Certify.exe corpus 2 (sigma 2)
OriginalFileNameeq
  • Certify.exe