Detection rules › Sigma

Uncommon Child Process Of BgInfo.EXE

Severity
medium
Author
Nasreddine Bencherchali (Nextron Systems), Beyu Denis, oscd.community
Source
upstream

Detects uncommon child processes of "BgInfo.exe" which could be a sign of potential abuse of the binary to proxy execution via external VBScript

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1059.005 Command and Scripting Interpreter: Visual Basic
Defense EvasionT1202 Indirect Command Execution, T1218 System Binary Proxy Execution

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation
Security-Auditing4688A new process has been created.

Stages and Predicates

Stage 1: selection

or:
ParentImage|endswith: '\bginfo.exe'
ParentImage|endswith: '\bginfo64.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
ParentImageends_with
  • \bginfo.exe corpus 2 (sigma 2)
  • \bginfo64.exe corpus 2 (sigma 2)