Virtual Machine Fingerprinting via Grepedit
An adversary may attempt to get detailed information about the operating system and hardware. This rule identifies common locations used to discover virtual machine hardware by a non-root user. This technique has been used by the Pupy RAT and other malware.
Rule type: eql
Rule indices:
- auditbeat-*
- logs-endpoint.events.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- macOS
- Linux
- Threat Detection
- Discovery
Version: 100 (version history)
Added (Elastic Stack release): 7.16.0
Last modified (Elastic Stack release): 8.5.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positivesedit
Certain tools or automated software may enumerate hardware information. These tools can be exempted via user name or process arguments to eliminate potential noise.
Investigation guideedit
Rule queryedit
process where event.type == "start" and process.name in ("grep", "egrep") and user.id != "0" and process.args : ("parallels*", "vmware*", "virtualbox*") and process.args : "Manufacturer*" and not process.parent.executable in ("/Applications/Docker.app/Contents/MacOS/Docker", "/usr/libexec/kcare/virt-what")
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
-
Technique:
- Name: System Information Discovery
- ID: T1082
- Reference URL: https://attack.mitre.org/techniques/T1082/
Rule version historyedit
- Version 100 (8.5.0 release)
-
- Formatting only
- Version 4 (8.4.0 release)
-
-
Updated query, changed from:
process where event.type == "start" and process.name in ("grep", "egrep") and user.id != "0" and process.args : ("parallels*", "vmware*", "virtualbox*") and process.args : "Manufacturer*" and not process.parent.executable in ("/Applications/Docker.app/Contents/MacOS/Docker", "/usr/libexec/kcare/virt-what")
-
- Version 2 (8.2.0 release)
-
- Formatting only