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Potential Meterpreter Reverse Shell

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Potential Meterpreter Reverse Shell

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This detection rule identifies a sample of suspicious Linux system file reads used for system fingerprinting, leveraged by the Metasploit Meterpreter shell to gather information about the target that it is executing its shell on. Detecting this pattern is indicative of a successful meterpreter shell connection.

Rule type: eql

Rule indices:

auditbeat-*
logs-auditd_manager.auditd-*

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: None

Tags:

Domain: Endpoint
OS: Linux
Use Case: Threat Detection
Tactic: Execution

Version: 3

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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sample by host.id, process.pid, user.id
[file where host.os.type == "linux" and event.dataset == "auditd_manager.auditd" and auditd.data.syscall == "open" and
  auditd.data.a2 == "1b6" and file.path == "/etc/machine-id"]
[file where host.os.type == "linux" and event.dataset == "auditd_manager.auditd" and auditd.data.syscall == "open" and
  auditd.data.a2 == "1b6" and file.path == "/etc/passwd"]
[file where host.os.type == "linux" and event.dataset == "auditd_manager.auditd" and auditd.data.syscall == "open" and
  auditd.data.a2 == "1b6" and file.path == "/proc/net/route"]
[file where host.os.type == "linux" and event.dataset == "auditd_manager.auditd" and auditd.data.syscall == "open" and
  auditd.data.a2 == "1b6" and file.path == "/proc/net/ipv6_route"]
[file where host.os.type == "linux" and event.dataset == "auditd_manager.auditd" and auditd.data.syscall == "open" and
  auditd.data.a2 == "1b6" and file.path == "/proc/net/if_inet6"]

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/
Sub-technique:
- Name: Unix Shell
- ID: T1059.004
- Reference URL: https://attack.mitre.org/techniques/T1059/004/
Tactic:
- Name: Command and Control
- ID: TA0011
- Reference URL: https://attack.mitre.org/tactics/TA0011/
Technique:
- Name: Application Layer Protocol
- ID: T1071
- Reference URL: https://attack.mitre.org/techniques/T1071/

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