Detection rules › Sigma

EvilNum APT Golden Chickens Deployment Via OCX Files

Status
test
Severity
critical
Log source
category process_creation, product windows
Author
Florian Roth (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects Golden Chickens deployment method as used by Evilnum and described in ESET July 2020 report

MITRE ATT&CK coverage

Telemetry coverage

Rule body

title: EvilNum APT Golden Chickens Deployment Via OCX Files
id: 8acf3cfa-1e8c-4099-83de-a0c4038e18f0
status: test
description: Detects Golden Chickens deployment method as used by Evilnum and described in ESET July 2020 report
references:
    - https://www.welivesecurity.com/2020/07/09/more-evil-deep-look-evilnum-toolset/
    - https://app.any.run/tasks/33d37fdf-158d-4930-aa68-813e1d5eb8ba/
author: Florian Roth (Nextron Systems)
date: 2020-07-10
modified: 2023-03-09
tags:
    - attack.stealth
    - attack.t1218.011
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - 'regsvr32'
            - '/s'
            - '/i'
            - '\AppData\Roaming\'
            - '.ocx'
    condition: selection
falsepositives:
    - Unknown
level: critical

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    CommandLine|contains|all:
        - 'regsvr32'
        - '/s'
        - '/i'
        - '\AppData\Roaming\'
        - '.ocx'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • .ocx
  • /i corpus 2 (sigma 2)
  • /s corpus 8 (sigma 6, splunk 2)
  • \AppData\Roaming\ corpus 17 (sigma 16, elastic 1)
  • regsvr32 corpus 15 (sigma 15)
field:"CommandLine" kind:match