Suspicious Redirection to Local Admin Share — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-01-16 / 2023-12-28.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: abd316c7a8c9cecedade6a9bc970c056b3b00e9d8daa5d94909f5d85a253e42a

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Suspicious Redirection to Local Admin Share
id: ab9e3b40-0c85-4ba1-aede-455d226fd124
status: test
description: Detects a suspicious output redirection to the local admins share, this technique is often found in malicious scripts or hacktool stagers
references:
    - https://www.microsoft.com/security/blog/2022/01/15/destructive-malware-targeting-ukrainian-organizations/
    - http://blog.talosintelligence.com/2022/09/lazarus-three-rats.html
author: Florian Roth (Nextron Systems)
date: 2022-01-16
modified: 2023-12-28
tags:
    - attack.exfiltration
    - attack.t1048
logsource:
    category: process_creation
    product: windows
detection:
    selection_redirect:
        CommandLine|contains: '>'
    selection_share:
        CommandLine|contains:
            - '\\\\127.0.0.1\\admin$\\'
            - '\\\\localhost\\admin$\\'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.microsoft.com/security/blog/2022/01/15/destructive-malware-targeting-ukrainian-organizations/
• http://blog.talosintelligence.com/2022/09/lazarus-three-rats.html