Detection rules › Sigma

Diamond Sleet APT File Creation Indicators

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

Detects file creation activity that is related to Diamond Sleet APT activity

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
ExecutionNo specific technique

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 11: FileCreate

Rule body

title: Diamond Sleet APT File Creation Indicators
id: e1212b32-55ff-4dfb-a595-62b572248056
status: test
description: Detects file creation activity that is related to Diamond Sleet APT activity
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: file_event
    product: windows
detection:
    selection:
        TargetFilename|endswith:
            - ':\ProgramData\4800-84DC-063A6A41C5C'
            - ':\ProgramData\clip.exe'
            - ':\ProgramData\DSROLE.dll'
            - ':\ProgramData\Forest64.exe'
            - ':\ProgramData\readme.md'
            - ':\ProgramData\Version.dll'
            - ':\ProgramData\wsmprovhost.exe'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    TargetFilename|endswith:
        - ':\ProgramData\4800-84DC-063A6A41C5C'
        - ':\ProgramData\clip.exe'
        - ':\ProgramData\DSROLE.dll'
        - ':\ProgramData\Forest64.exe'
        - ':\ProgramData\readme.md'
        - ':\ProgramData\Version.dll'
        - ':\ProgramData\wsmprovhost.exe'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
TargetFilenameends_with
  • :\ProgramData\4800-84DC-063A6A41C5C
  • :\ProgramData\DSROLE.dll
  • :\ProgramData\Forest64.exe
  • :\ProgramData\Version.dll
  • :\ProgramData\clip.exe
  • :\ProgramData\readme.md
  • :\ProgramData\wsmprovhost.exe
field:"TargetFilename" kind:ends_with