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Detection rules › Sigma

Triple Cross eBPF Rootkit Execve Hijack

Status
test
Severity
high
Log source
category process_creation, product linux
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects execution of a the file "execve_hijack" which is used by the Triple Cross rootkit as a way to elevate privileges

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
Privilege EscalationNo specific technique
StealthNo specific technique

Telemetry coverage

PlatformRecord / event type
LinuxEvent ID 1: Process Create

Rule body

title: Triple Cross eBPF Rootkit Execve Hijack
id: 0326c3c8-7803-4a0f-8c5c-368f747f7c3e
status: test
description: Detects execution of a the file "execve_hijack" which is used by the Triple Cross rootkit as a way to elevate privileges
references:
    - https://github.com/h3xduck/TripleCross/blob/1f1c3e0958af8ad9f6ebe10ab442e75de33e91de/src/helpers/execve_hijack.c#L275
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-07-05
tags:
    - attack.privilege-escalation
    - attack.stealth
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        Image|endswith: '/sudo'
        CommandLine|contains: 'execve_hijack'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image|endswith: '/sudo'
    CommandLine|contains: 'execve_hijack'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • execve_hijack
field:"CommandLine" kind:match value:"execve_hijack"
Imageends_with
  • /sudo
field:"Image" kind:ends_with value:"/sudo"