Detection rules › Sigma
Small Sieve Malware CommandLine Indicator
Detects specific command line argument being passed to a binary as seen being used by the malware Small Sieve.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1574.001 Hijack Execution Flow: DLL |
| Stealth | T1574.001 Hijack Execution Flow: DLL |
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: Small Sieve Malware CommandLine Indicator
id: 21117127-21c8-437a-ae03-4b51e5a8a088
status: test
description: Detects specific command line argument being passed to a binary as seen being used by the malware Small Sieve.
references:
- https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/small-sieve/NCSC-MAR-Small-Sieve.pdf
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-19
tags:
- attack.privilege-escalation
- attack.persistence
- attack.execution
- attack.stealth
- attack.t1574.001
- detection.emerging-threats
logsource:
product: windows
category: process_creation
detection:
selection:
CommandLine|endswith: '.exe Platypus'
condition: selection
falsepositives:
- Unlikely
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
CommandLine|endswith: '.exe Platypus'
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 | ends_with |
|