detection.wiki

Detection rules › Sigma

OpenCanary - SMB File Open Request

Status
test
Severity
high
Log source
product opencanary, category application
Author
Security Onion Solutions
Source
github.com/SigmaHQ/sigma

Detects instances where an SMB service on an OpenCanary node has had a file open request.

MITRE ATT&CK coverage

TacticTechniques
Lateral MovementT1021 Remote Services
CollectionT1005 Data from Local System

Rule body yaml

title: OpenCanary - SMB File Open Request
id: 22777c9e-873a-4b49-855f-6072ab861a52
status: test
description: Detects instances where an SMB service on an OpenCanary node has had a file open request.
references:
    - https://opencanary.readthedocs.io/en/latest/starting/configuration.html#services-configuration
    - https://github.com/thinkst/opencanary/blob/a0896adfcaf0328cfd5829fe10d2878c7445138e/opencanary/logger.py#L52
author: Security Onion Solutions
date: 2024-03-08
tags:
    - attack.lateral-movement
    - attack.collection
    - attack.t1021
    - attack.t1005
logsource:
    category: application
    product: opencanary
detection:
    selection:
        logtype: 5000
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    logtype: 5000

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
logtypeeq
  • 5000