Detection rules › Sigma

Renamed CURL.EXE Execution

Severity
medium
Author
X__Junior (Nextron Systems)
Source
upstream

Detects the execution of a renamed "CURL.exe" binary based on the PE metadata fields

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1059 Command and Scripting Interpreter
Defense EvasionT1202 Indirect Command Execution

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection

or:
Description: 'The curl executable'
OriginalFileName: curl.exe

Stage 2: not 1 of filter_main_img

Image|contains: '\curl'

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
Descriptioneq
  • The curl executable
Imagematch
  • \curl
OriginalFileNameeq
  • curl.exe corpus 11 (sigma 11)