Detection rules › Sigma
Winlogon process contact to C2 - Blacklotus (Sysmon)
Detects Blacklotus HTTP downloader injection into winlogon.exe process.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Discovery | T1016 System Network Configuration Discovery |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
Rule body yaml
title: Winlogon process contact to C2 - Blacklotus (Sysmon)
description: Detects Blacklotus HTTP downloader injection into winlogon.exe process.
requirements: SYSMON configuration from SwiftOnSecurity needs to be adapted in order to audit winlogon.exe connections.
references:
- https://www.microsoft.com/en-us/security/blog/2023/04/11/guidance-for-investigating-attacks-using-cve-2022-21894-the-blacklotus-campaign/
tags:
- attack.command_and_control
- attack.discovery
- attack.t1016 # System Network Configuration Discovery
author: mdecrevoisier
status: experimental
logsource:
product: windows
category: process_creation
detection:
selection:
Image|endswith: '\winlogon.exe'
DestinationPort: 80
condition: selection
falsepositives:
- None
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Image|endswith: '\winlogon.exe'
DestinationPort: 80
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 |
|---|---|---|
DestinationPort | eq |
|
Image | ends_with |
|