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Detection rules › Sigma

HackTool - Koadic Execution

Status
test
Severity
high
Log source
product windows, category process_creation
Author
wagga, Jonhnathan Ribeiro, oscd.community
Source
github.com/SigmaHQ/sigma

Detects command line parameters used by Koadic hack tool

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1059.003 Command and Scripting Interpreter: Windows Command Shell, T1059.005 Command and Scripting Interpreter: Visual Basic, T1059.007 Command and Scripting Interpreter: JavaScript

Event coverage

ProviderEventTitle
SysmonEvent ID 1Process creation

Rule body yaml

title: HackTool - Koadic Execution
id: 5cddf373-ef00-4112-ad72-960ac29bac34
status: test
description: Detects command line parameters used by Koadic hack tool
references:
    - https://unit42.paloaltonetworks.com/unit42-sofacy-groups-parallel-attacks/
    - https://github.com/offsecginger/koadic/blob/457f9a3ff394c989cdb4c599ab90eb34fb2c762c/data/stager/js/stdlib.js
    - https://blog.f-secure.com/hunting-for-koadic-a-com-based-rootkit/
author: wagga, Jonhnathan Ribeiro, oscd.community
date: 2020-01-12
modified: 2023-02-11
tags:
    - attack.execution
    - attack.t1059.003
    - attack.t1059.005
    - attack.t1059.007
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\cmd.exe'
        - OriginalFileName: 'Cmd.Exe'
    selection_cli:
        CommandLine|contains|all:
            - '/q'
            - '/c'
            - 'chcp'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: condition

all of selection_*

Stage 1: selection_img

selection_img:
    - Image|endswith: '\cmd.exe'
    - OriginalFileName: 'Cmd.Exe'

Stage 2: selection_cli

selection_cli:
    CommandLine|contains|all:
        - '/q'
        - '/c'
        - 'chcp'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
CommandLinematch
  • /c corpus 15 (sigma 13, splunk 2)
  • /q corpus 8 (sigma 7, splunk 1)
  • chcp
Imageends_with
  • \cmd.exe corpus 130 (sigma 130)
OriginalFileNameeq
  • Cmd.Exe corpus 65 (sigma 43, splunk 17, elastic 5)