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Detection rules › Sigma

Cisco LDP Authentication Failures

Status
test
Severity
low
Log source
product cisco, service ldp
Author
Tim Brown
Source
github.com/SigmaHQ/sigma

Detects LDP failures which may be indicative of brute force attacks to manipulate MPLS labels

MITRE ATT&CK coverage

TacticTechniques
Initial AccessT1078 Valid Accounts
PersistenceT1078 Valid Accounts
Privilege EscalationT1078 Valid Accounts
StealthT1078 Valid Accounts
Credential AccessT1110 Brute Force, T1557 Adversary-in-the-Middle
CollectionT1557 Adversary-in-the-Middle

Rule body yaml

title: Cisco LDP Authentication Failures
id: 50e606bf-04ce-4ca7-9d54-3449494bbd4b
status: test
description: Detects LDP failures which may be indicative of brute force attacks to manipulate MPLS labels
references:
    - https://www.blackhat.com/presentations/bh-usa-03/bh-us-03-convery-franz-v3.pdf
author: Tim Brown
date: 2023-01-09
tags:
    - attack.initial-access
    - attack.persistence
    - attack.privilege-escalation
    - attack.credential-access
    - attack.collection
    - attack.stealth
    - attack.t1078
    - attack.t1110
    - attack.t1557
logsource:
    product: cisco
    service: ldp
    definition: 'Requirements: cisco ldp logs need to be enabled and ingested'
detection:
    selection_protocol:
        - 'LDP'
    selection_keywords:
        - 'SOCKET_TCP_PACKET_MD5_AUTHEN_FAIL'
        - 'TCPMD5AuthenFail'
    condition: selection_protocol and selection_keywords
falsepositives:
    - Unlikely. Except due to misconfigurations
level: low

Stages and Predicates

Stage 0: condition

selection_protocol and selection_keywords

Stage 1: selection_protocol

selection_protocol:
    - 'LDP'

Stage 2: selection_keywords

selection_keywords:
    - 'SOCKET_TCP_PACKET_MD5_AUTHEN_FAIL'
    - 'TCPMD5AuthenFail'