Detection rules › Sigma
Suspicious Rundll32 Invoking Inline VBScript
Detects suspicious process related to rundll32 based on command line that invokes inline VBScript as seen being used by UNC2452
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Privilege Escalation | T1055 Process Injection |
| Stealth | T1055 Process Injection |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
title: Suspicious Rundll32 Invoking Inline VBScript
id: 1cc50f3f-1fc8-4acf-b2e9-6f172e1fdebd
status: test
description: Detects suspicious process related to rundll32 based on command line that invokes inline VBScript as seen being 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.stealth
- attack.t1055
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine|contains|all:
- 'rundll32.exe'
- 'Execute'
- 'RegRead'
- 'window.close'
condition: selection
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
CommandLine|contains|all:
- 'rundll32.exe'
- 'Execute'
- 'RegRead'
- 'window.close'
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.
| Field | Kind | Values |
|---|---|---|
CommandLine | match |
|