Identifier / Programs / Linux and Unix
clamscan
A virus scanner. tldr-pages
GTFOBins file-read 1 documented command
How clamscan is abused
file-read
--no-summary-d-f-nEEach abuse is GTFOBins's category and the options and words it uses; the full write-up is on GTFOBins's page for clamscan.
1 documented command
file-read unprivileged, with sudo, as SUID
Each line of the file is interpreted as a path and the content is leaked via error messages. The output can optionally be cleaned using sed.
touch x.yara
clamscan --no-summary -d x.yara -f /path/to/input-file 2>&1 | sed -nE 's/^(.*): No such file or directory$/\1/p'The command the identifier reads trips no 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 clamscan. The identifier reads the line that runs clamscan.
Everyday use
Scan a file for vulnerabilities
clamscan path/to/fileIdentifyScan all files recursively in a specific directory
clamscan --recursive path/to/directoryIdentifyScan data from stdin
command | clamscan -IdentifyNone of the 3 examples the identifier reads matches GTFOBins abuse or trips a Sigma process-creation rule.