Diamond Sleet APT Process Activity Indicators

Status: test
Severity: high
Log source: category process_creation, product windows
Author: Nasreddine Bencherchali (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects process creation activity indicators related to Diamond Sleet APT

Known false positives

Unlikely

MITRE ATT&CK coverage

Tactic	Techniques
Execution	No specific technique

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: Diamond Sleet APT Process Activity Indicators
id: b5495d8d-24ad-4a44-8caf-ceae9a07a5c2
status: test
description: Detects process creation activity indicators related to Diamond Sleet APT
references:
    - https://www.microsoft.com/en-us/security/blog/2023/10/18/multiple-north-korean-threat-actors-exploiting-the-teamcity-cve-2023-42793-vulnerability/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-10-24
tags:
    - attack.execution
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains: ' uTYNkfKxHiZrx3KJ'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    CommandLine|contains: ' uTYNkfKxHiZrx3KJ'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`uTYNkfKxHiZrx3KJ`	`field:"CommandLine" kind:match value:" uTYNkfKxHiZrx3KJ"`

Diamond Sleet APT Process Activity Indicators

Known false positives

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`