Identifier / Programs / Linux and Unix
ss
Utility to investigate sockets. tldr-pages
GTFOBins file-read 1 Sigma rule name it 1 documented command
How ss is abused
file-read
-a-FEach abuse is GTFOBins's category and the options and words it uses; the full write-up is on GTFOBins's page for ss.
1 documented command
file-read unprivileged, with sudo, as SUID
The file content is actually parsed so only a part of the first line is returned as a part of an error message.
ss -a -F /path/to/input-fileTrips 1 Sigma rule: informationalSystem Network Discovery - Linux by Ömer Günal and remotephone, oscd.community
The command the identifier reads trips a Sigma process-creation rule. This command is, with GTFOBins’ notes, from GTFOBins, at commit acd524623f9c of 2026-05-27, under the GPL-3.0, with no warranty. Changed: Markdown is shown formatted. The source is in lolbas-gtfobins-commands.json.gz, and the full entry is on GTFOBins’s page for ss. The identifier reads the line that runs ss.
What detects it
Everyday use
Show all TCP/UDP/RAW/UNIX sockets
ss --all --tcpIdentifyTrips 1 Sigma rule: informationalSystem Network Discovery - Linux by Ömer Günal and remotephone, oscd.community
Filter TCP sockets by states, only/exclude
ss state bucketIdentifyTrips 1 Sigma rule: informationalSystem Network Discovery - Linux by Ömer Günal and remotephone, oscd.community
Show all TCP sockets connected to the local HTTPS port (443)
ss --tcp src :443IdentifyTrips 1 Sigma rule: informationalSystem Network Discovery - Linux by Ömer Günal and remotephone, oscd.community
Of the 3 examples the identifier reads, 3 match GTFOBins abuse or trip a Sigma process-creation rule.