Identifier / Programs / Linux and Unix
basenc
Encode or decode file or stdin using a specified encoding, to stdout. tldr-pages
GTFOBins file-read 1 documented command
How basenc is abused
file-read
--base64-dEach abuse is GTFOBins's category and the options and words it uses; the full write-up is on GTFOBins's page for basenc.
1 documented command
file-read unprivileged, with sudo, as SUID
basenc --base64 /path/to/input-file | basenc -d --base64IdentifyThe command the identifier reads trips no Sigma process-creation rule. This command is 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 basenc. The identifier reads the line that runs basenc.
Everyday use
Encode a file with Base64 encoding
basenc --base64 path/to/fileIdentifyDecode a file with Base64 encoding
basenc --decode --base64 path/to/fileIdentifyEncode from stdin with Base32 encoding with 42 columns
command | basenc --base32 --wrap 42IdentifyNone of the 3 examples the identifier reads matches GTFOBins abuse or trips a Sigma process-creation rule.