Detection rules › Sigma

Suspicious Plink Port Forwarding

Severity
high
Author
Florian Roth (Nextron Systems)
Source
upstream

Detects suspicious Plink tunnel port forwarding to a local port

MITRE ATT&CK coverage

TacticTechniques
Lateral MovementT1021.001 Remote Services: Remote Desktop Protocol
Command & ControlT1572 Protocol Tunneling

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection

CommandLine|contains: ' -R '
Description: 'Command-line SSH, Telnet, and Rlogin client'

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
  • -R corpus 4 (sigma 4)
Descriptioneq
  • Command-line SSH, Telnet, and Rlogin client