Detection rules › Sigma
Suspicious VBScript UN2452 Pattern
Detects suspicious inline VBScript keywords as used by UNC2452
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | |
| Privilege Escalation |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: Suspicious VBScript UN2452 Pattern
id: 20c3f09d-c53d-4e85-8b74-6aa50e2f1b61
status: test
description: Detects suspicious inline VBScript keywords as used by UNC2452
references:
- https://www.microsoft.com/security/blog/2021/03/04/goldmax-goldfinder-sibot-analyzing-nobelium-malware/
author: Florian Roth (Nextron Systems)
date: 2021-03-05
modified: 2022-10-09
tags:
- attack.privilege-escalation
- attack.persistence
- attack.t1547.001
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine|contains|all:
- 'Execute'
- 'CreateObject'
- 'RegRead'
- 'window.close'
- '\Microsoft\Windows\CurrentVersion'
filter:
CommandLine|contains: '\Software\Microsoft\Windows\CurrentVersion\Run'
condition: selection and not filter
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selection and not filterStage 1: selection
selection:
CommandLine|contains|all:
- 'Execute'
- 'CreateObject'
- 'RegRead'
- 'window.close'
- '\Microsoft\Windows\CurrentVersion'
Stage 2: not filter
filter:
CommandLine|contains: '\Software\Microsoft\Windows\CurrentVersion\Run'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
CommandLine | match | \Software\Microsoft\Windows\CurrentVersion\Run | excludes:CommandLine field:"CommandLine" value:"\Software\Microsoft\Windows\CurrentVersion\Run" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |