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Detection rules › Sigma

Potential CSharp Streamer RAT Loading .NET Executable Image

Status
test
Severity
high
Log source
category image_load, product windows
Author
Luca Di Bartolomeo
Source
github.com/SigmaHQ/sigma

Detects potential CSharp Streamer RAT loading .NET executable image by using the default file name and path associated with the tool.

MITRE ATT&CK coverage

TacticTechniques
Command & Control

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 7: Image loaded

Rule body

title: Potential CSharp Streamer RAT Loading .NET Executable Image
id: 6f6afac3-8e7a-4e4b-9588-2608ffe08f82
status: test
description: |
    Detects potential CSharp Streamer RAT loading .NET executable image by using the default file name and path associated with the tool.
references:
    - https://thedfirreport.com/2024/06/10/icedid-brings-screenconnect-and-csharp-streamer-to-alphv-ransomware-deployment/#detections
    - https://cyber.wtf/2023/12/06/the-csharp-streamer-rat/
author: Luca Di Bartolomeo
date: 2024-06-22
tags:
    - attack.command-and-control
    - attack.t1219.002
    - detection.emerging-threats
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|re: '\\AppData\\Local\\Temp\\dat[0-9A-Z]{4}\.tmp'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    ImageLoaded|re: '\\AppData\\Local\\Temp\\dat[0-9A-Z]{4}\.tmp'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
ImageLoadedregex_match
  • \AppData\Local\Temp\dat[0-9A-Z]{4}.tmp
field:"ImageLoaded" kind:regex_match value:"\AppData\Local\Temp\dat[0-9A-Z]{4}.tmp"