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Detection rules › Sigma

Pingback Backdoor DLL Loading Activity

Status
test
Severity
high
Log source
category image_load, product windows
Author
Bhabesh Raj
Source
github.com/SigmaHQ/sigma

Detects the use of Pingback backdoor that creates ICMP tunnel for C2 as described in the trustwave report

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
Execution
Stealth

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 7: Image loaded

Rule body

title: Pingback Backdoor DLL Loading Activity
id: 35a7dc42-bc6f-46e0-9f83-81f8e56c8d4b
related:
    - id: 35a7dc42-bc6f-46e0-9f83-81f8e56c8d4b # File indicators
      type: similar
    - id: b2400ffb-7680-47c0-b08a-098a7de7e7a9 # Process Creation
      type: similar
status: test
description: Detects the use of Pingback backdoor that creates ICMP tunnel for C2 as described in the trustwave report
references:
    - https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/backdoor-at-the-end-of-the-icmp-tunnel
    - https://app.any.run/tasks/4a54c651-b70b-4b72-84d7-f34d301d6406
author: Bhabesh Raj
date: 2021-05-05
modified: 2023-02-17
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.execution
    - attack.stealth
    - attack.t1574.001
    - detection.emerging-threats
logsource:
    product: windows
    category: image_load
detection:
    selection:
        Image|endswith: '\msdtc.exe'
        ImageLoaded: 'C:\Windows\oci.dll'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image|endswith: '\msdtc.exe'
    ImageLoaded: 'C:\Windows\oci.dll'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Imageends_with
  • \msdtc.exe corpus 2 (sigma 2)
field:"Image" kind:ends_with value:"\msdtc.exe"
ImageLoadedeq
  • C:\Windows\oci.dll
field:"ImageLoaded" kind:eq value:"C:\Windows\oci.dll"