Detection rules › Sigma

Potential Binary Proxy Execution Via Cdb.EXE

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

Detects usage of "cdb.exe" to launch arbitrary processes or commands from a debugger script file

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1106 Native API
Defense EvasionT1127 Trusted Developer Utilities Proxy Execution, T1218 System Binary Proxy Execution

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: all of selection_img

or:
Image|endswith: '\cdb.exe'
OriginalFileName: CDB.Exe

Stage 2: all of selection_cli

or:
CommandLine|contains: ' -c '
CommandLine|contains: ' -cf '

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
  • -c corpus 11 (sigma 11)
  • -cf
Imageends_with
  • \cdb.exe
OriginalFileNameeq
  • CDB.Exe