Nohup Execution
A Sigma rule for process creation on Linux, by Christopher Peacock @SecurePeacock, SCYTHE @scythe_io.
medium 1 ATT&CK technique 1 program it names 3 everyday examples trip it
What it looks for
detection:
selection:
Image|endswith: '/nohup'
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 Christopher Peacock @SecurePeacock, SCYTHE @scythe_io, 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
Run a process that can live beyond the terminal on the page for nohup
nohup command argument1 argument2 ...IdentifyLaunch nohup in background mode on the page for nohup
nohup command argument1 argument2 ... &IdentifyRun a shell script that can live beyond the terminal on the page for nohup
nohup path/to/script.sh &IdentifyThe commands LOLBAS or GTFOBins documents for nohup trip it too: each is on its program’s page, read by CmdID.