Detection rules › Sigma

Suspicious ZipExec Execution

Severity
medium
Author
frack113
Source
upstream

ZipExec is a Proof-of-Concept (POC) tool to wrap binary-based tools into a password-protected zip file.

MITRE ATT&CK coverage

TacticTechniques
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: run

CommandLine|contains: .zip
CommandLine|contains: '/generic:Microsoft_Windows_Shell_ZipFolder:filename='
CommandLine|contains: '/pass:'
CommandLine|contains: '/user:'

Stage 2: delete

CommandLine|contains: .zip
CommandLine|contains: '/delete'
CommandLine|contains: 'Microsoft_Windows_Shell_ZipFolder:filename='

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
  • .zip corpus 4 (sigma 4)
  • /delete corpus 4 (sigma 4)
  • /generic:Microsoft_Windows_Shell_ZipFolder:filename=
  • /pass: corpus 2 (sigma 2)
  • /user: corpus 3 (sigma 3)
  • Microsoft_Windows_Shell_ZipFolder:filename=