Sigma rule: Linux Recon Indicators

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-7784bf546fa9, updated 2022-06-20T00:00:00.000Z.

Rule

Title
Linux Recon Indicators
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2022-06-20
File
rules/linux/process_creation/proc_creation_lnx_susp_recon_indicators.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects events with patterns found in commands used for reconnaissance on linux systems

Log source

product
linux
category
process_creation

Detection

selection:
    CommandLine|contains:
        - ' -name .htpasswd'
        - ' -perm -4000 '
condition: selection

False positives (as the rule lists them)

  • Legitimate administration activities

Tags

  • attack.reconnaissance
  • attack.t1592.004
  • attack.credential-access
  • attack.t1552.001

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/process_creation/proc_creation_lnx_susp_recon_indicators.yml

Sources and licences

  • SigmaHQ

    "Linux Recon Indicators" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/process_creation/proc_creation_lnx_susp_recon_indicators.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Linux Recon Indicators",
entity page, dataset version ref-7784bf546fa9, updated 2022-06-20T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/0cf7a157-8879-41a2-8f55-388dd23746b7 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 0cf7a157-8879-41a2-8f55-388dd23746b7, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.