Identifier / Programs / Linux and Unix
as
Portable GNU assembler. Primarily intended to assemble output from gcc to be used by ld. tldr-pages
GTFOBins file-read 1 documented command
How as is abused
file-read
Each abuse is GTFOBins's category and the options and words it uses; the full write-up is on GTFOBins's page for as.
1 documented command
file-read unprivileged, with sudo, as SUID
Lines are likely leaked as error messages.
as @/path/to/input-fileThe 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 as. The identifier reads the line that runs as.
Everyday use
Assemble a file, writing the output to a.out
as path/to/file.sIdentifyAssemble the output to a given file
as path/to/file.s -o path/to/output_file.oIdentifyGenerate output faster by skipping whitespace and comment preprocessing. (Should only be used for trusted compilers)
as -f path/to/file.sIdentifyNone of the 3 examples the identifier reads matches GTFOBins abuse or trips a Sigma process-creation rule.