Renamed Jusched.EXE Execution — Sigma Rule

Rule metadata and linked tags

Author: Markus Neis, Swisscom. Source status: test; severity: high. Source dates: 2019-06-04 / 2023-02-03.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 66f516575f00a48ab7e4282fc92f243d70338b8672624660f4295318ea0c8d9f

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: Renamed Jusched.EXE Execution
id: edd8a48c-1b9f-4ba1-83aa-490338cd1ccb
status: test
description: Detects the execution of a renamed "jusched.exe" as seen used by the cobalt group
references:
    - https://www.bitdefender.com/files/News/CaseStudies/study/262/Bitdefender-WhitePaper-An-APT-Blueprint-Gaining-New-Visibility-into-Financial-Threats-interactive.pdf
author: Markus Neis, Swisscom
date: 2019-06-04
modified: 2023-02-03
tags:
    - attack.execution
    - attack.stealth
    - attack.t1036.003
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Description:
            - Java Update Scheduler
            - Java(TM) Update Scheduler
    filter:
        Image|endswith: '\jusched.exe'
    condition: selection and not filter
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.bitdefender.com/files/News/CaseStudies/study/262/Bitdefender-WhitePaper-An-APT-Blueprint-Gaining-New-Visibility-into-Financial-Threats-interactive.pdf