Detection rules › Sigma

Local File Read Using Curl.EXE

Severity
medium
Author
Nasreddine Bencherchali (Nextron Systems)
Source
upstream

Detects execution of "curl.exe" with the "file://" protocol handler in order to read local files.

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: all of selection_img

or:
Image|endswith: '\curl.exe'
OriginalFileName: curl.exe

Stage 2: all of selection_cli

CommandLine|contains: 'file:///'

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
  • file:///
Imageends_with
  • \curl.exe corpus 19 (sigma 19)
OriginalFileNameeq
  • curl.exe corpus 11 (sigma 11)