Finger.EXE Execution
A Sigma rule for process creation on Windows, by Florian Roth (Nextron Systems), omkar72, oscd.community.
high 1 ATT&CK technique 1 program it names 3 everyday examples trip it
What it looks for
detection:
selection:
- OriginalFileName: 'finger.exe'
- Image|endswith: '\finger.exe'
condition: selection
The rule’s detection, its selections and fields in order of name. The whole rule, with its references and false positives, is on SigmaHQ, by Florian Roth (Nextron Systems), omkar72, oscd.community, under the Detection Rule License 1.1. CmdID evaluates it on a command line alone: a test on what a command line cannot show, such as the parent process or the user, is not met.
Command lines that trip it
Display information about a specific user on the page for finger.exe
finger user@hostIdentifyDisplay information about all users on the specified host on the page for finger.exe
finger @hostIdentifyDisplay information in a longer format on the page for finger.exe
finger user@host -lIdentifyThe commands LOLBAS or GTFOBins documents for finger.exe trip it too: each is on its program’s page, read by CmdID.