Nohup Execution

calendar Oct 17, 2023 · attack.execution attack.t1059.004  ·
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Detects usage of nohup which could be leveraged by an attacker to keep a process running or break out from restricted environments

Sigma rule (View on GitHub)

 1title: Nohup Execution
 2id: e4ffe466-6ff8-48d4-94bd-e32d1a6061e2
 3status: test
 4description: Detects usage of nohup which could be leveraged by an attacker to keep a process running or break out from restricted environments
 5references:
 6    - https://gtfobins.github.io/gtfobins/nohup/
 7    - https://en.wikipedia.org/wiki/Nohup
 8    - https://www.computerhope.com/unix/unohup.htm
 9author: 'Christopher Peacock @SecurePeacock, SCYTHE @scythe_io'
10date: 2022/06/06
11tags:
12    - attack.execution
13    - attack.t1059.004
14logsource:
15    product: linux
16    category: process_creation
17detection:
18    selection:
19        Image|endswith: '/nohup'
20    condition: selection
21falsepositives:
22    - Administrators or installed processes that leverage nohup
23level: medium

References

  • nohup | GTFOBins

    .. / nohup Shell Command SUID Sudo Shell It can be used to break out from restricted environments by spawning an interactive system shell. nohup /bin/sh -c "sh $(tty) 2>$(tty)" Command It can be us...


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  • nohup - Wikipedia

    nohup is a POSIX command which means "no hang up". Its purpose is to execute a command such that it ignores the HUP (hangup) signal and therefore does not stop when the user logs out. Output that w...


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  • Linux Nohup Command Help and Examples

    Linux nohup command help and information with nohup examples, syntax, related commands, and how to use the nohup command from the command line.


    Read More

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