Virtual Machine Fingerprinting via Grep
editVirtual Machine Fingerprinting via Grep
editAn 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: 2 (version history)
Added (Elastic Stack release): 7.16.0
Last modified (Elastic Stack release): 8.2.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positives
editCertain tools or automated software may enumerate hardware information. These tools can be exempted via user name or process arguments to eliminate potential noise.
Investigation guide
edit## Config If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
Rule query
editprocess 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 mapping
editFramework: 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 history
edit- Version 2 (8.2.0 release)
-
- Formatting only