Ursnif Redirection Of Discovery Commands

Detects the redirection of Ursnif discovery commands as part of the initial execution of the malware.

Detection logic

selection

ParentImage|endswith: \explorer.exe
Image|endswith: \cmd.exe
CommandLine|contains|all:
  - "/C "
  - " >> *\\AppData\\local\\temp\\*.bin"

Condition

selection

Raw YAML

title: Ursnif Redirection Of Discovery Commands
id: 7aaa5739-12fc-41aa-b98b-23ec27d42bdf
status: test
description: |
    Detects the redirection of Ursnif discovery commands as part of the initial execution of the malware.
references:
    - Internal Research
author: '@kostastsale'
date: 2023-07-16
tags:
    - attack.execution
    - attack.t1059
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\explorer.exe'
        Image|endswith: '\cmd.exe'
        CommandLine|contains|all:
            - '/C '
            - ' >> *\AppData\local\temp\*.bin'
    condition: selection
falsepositives:
    - Unlikely
level: high

False positives

Unlikely

References

Internal Research

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