Detection rules › Sigma

Browser Started with Remote Debugging

Severity
medium
Author
pH-T (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
Source
upstream

Detects browsers starting with the remote debugging flags. Which is a technique often used to perform browser injection attacks

MITRE ATT&CK coverage

TacticTechniques
CollectionT1185 Browser Session Hijacking

Event coverage

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

Stages and Predicates

Stage 1: 1 of selection_chromium_based

CommandLine|contains: ' --remote-debugging-'

Stage 2: 1 of selection_firefox

CommandLine|contains: ' -start-debugger-server'
Image|endswith: '\firefox.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
CommandLinematch
  • --remote-debugging-
  • -start-debugger-server
Imageends_with
  • \firefox.exe corpus 6 (sigma 6)