Sigma rule: JexBoss Command Sequence

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-8d8b710f8720, updated 2025-11-22T00:00:00.000Z.

Rule

Title
JexBoss Command Sequence
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2017-08-24
Modified
2025-11-22
File
rules/linux/builtin/lnx_susp_jexboss.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects suspicious command sequence that JexBoss

Log source

product
linux

Detection

keywords:
    '|all':
        - 'bash -c /bin/bash'
        - '&/dev/tcp/'
condition: keywords

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.execution
  • attack.t1059.004

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/builtin/lnx_susp_jexboss.yml

Sources and licences

  • SigmaHQ

    "JexBoss Command Sequence" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/builtin/lnx_susp_jexboss.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: JexBoss Command Sequence",
entity page, dataset version ref-8d8b710f8720, updated 2025-11-22T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/8ec2c8b4-557a-4121-b87c-5dfb3a602fae (accessed 2026-11-03).
Underlying source: SigmaHQ rule 8ec2c8b4-557a-4121-b87c-5dfb3a602fae, 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.