IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Potential SSH-IT SSH Worm Downloaded

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Potential SSH-IT SSH Worm Downloaded

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Identifies processes that are capable of downloading files with command line arguments containing URLs to SSH-IT’s autonomous SSH worm. This worm intercepts outgoing SSH connections every time a user uses ssh.

Rule type: eql

Rule indices:

logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://www.thc.org/ssh-it/

Tags:

Domain: Endpoint
OS: Linux
Use Case: Threat Detection
Tactic: Lateral Movement
Data Source: Elastic Defend
Data Source: Elastic Endgame

Version: 2

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and
process.name in ("curl", "wget") and process.args : (
  "https://thc.org/ssh-it/x", "http://nossl.segfault.net/ssh-it-deploy.sh", "https://gsocket.io/x",
  "https://thc.org/ssh-it/bs", "http://nossl.segfault.net/bs"
)

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Lateral Movement
- ID: TA0008
- Reference URL: https://attack.mitre.org/tactics/TA0008/
Technique:
- Name: Remote Services
- ID: T1021
- Reference URL: https://attack.mitre.org/techniques/T1021/
Sub-technique:
- Name: SSH
- ID: T1021.004
- Reference URL: https://attack.mitre.org/techniques/T1021/004/
Technique:
- Name: Remote Service Session Hijacking
- ID: T1563
- Reference URL: https://attack.mitre.org/techniques/T1563/
Sub-technique:
- Name: SSH Hijacking
- ID: T1563.001
- Reference URL: https://attack.mitre.org/techniques/T1563/001/

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