RDP Port Forwarding Rule Added Via Netsh.EXE

Severity: high
Author: Florian Roth (Nextron Systems), oscd.community
Source: upstream

Detects the execution of netsh to configure a port forwarding of port 3389 (RDP) rule

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1090` Proxy

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_img`

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

Stage 2: `all of selection_cli`

CommandLine|contains: ' c'
CommandLine|contains: ' i'
CommandLine|contains: ' p'
CommandLine|contains: '=3389'

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.

Field	Kind	Values
`CommandLine`	match	`c` `i` corpus 2 (sigma 2) `p` corpus 2 (sigma 2) `=3389`
`Image`	ends_with	`\netsh.exe` corpus 16 (sigma 16)
`OriginalFileName`	eq	`netsh.exe` corpus 14 (sigma 14)