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Detection rules › Sigma

Triple Cross eBPF Rootkit Default LockFile

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

Detects the creation of the file "rootlog" which is used by the TripleCross rootkit as a way to check if the backdoor is already running.

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
StealthNo specific technique

Telemetry coverage

PlatformRecord / event type
LinuxEvent ID 11: File created

Rule body

title: Triple Cross eBPF Rootkit Default LockFile
id: c0239255-822c-4630-b7f1-35362bcb8f44
status: test
description: Detects the creation of the file "rootlog" which is used by the TripleCross rootkit as a way to check if the backdoor is already running.
references:
    - https://github.com/h3xduck/TripleCross/blob/1f1c3e0958af8ad9f6ebe10ab442e75de33e91de/src/helpers/execve_hijack.c#L33
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-07-05
modified: 2022-12-31
tags:
    - attack.stealth
logsource:
    product: linux
    category: file_event
detection:
    selection:
        TargetFilename: '/tmp/rootlog'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    TargetFilename: '/tmp/rootlog'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
TargetFilenameeq
  • /tmp/rootlog
field:"TargetFilename" kind:eq value:"/tmp/rootlog"