MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Defense Impairment | |
| Discovery | |
| Lateral Movement | |
| Impact |
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: WannaCry Ransomware Activity
id: 41d40bff-377a-43e2-8e1b-2e543069e079
status: test
description: Detects WannaCry ransomware activity
references:
- https://www.hybrid-analysis.com/sample/ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa?environmentId=100
- https://x.com/nas_bench/status/1868639048484425963
author: Florian Roth (Nextron Systems), Tom U. @c_APT_ure (collection), oscd.community, Jonhnathan Ribeiro
date: 2019-01-16
modified: 2025-10-18
tags:
- attack.lateral-movement
- attack.defense-impairment
- attack.t1210
- attack.discovery
- attack.t1083
- attack.t1222.001
- attack.impact
- attack.t1486
- attack.t1490
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith:
- '\tasksche.exe'
- '\mssecsvc.exe'
- '\taskdl.exe'
- '\taskhsvc.exe'
- '\taskse.exe'
- '\111.exe'
- '\lhdfrgui.exe'
# - '\diskpart.exe' # cannot be used in a rule of level critical
- '\linuxnew.exe'
- '\wannacry.exe'
- Image|contains: 'WanaDecryptor'
selection_cmd:
CommandLine|contains: '@Please_Read_Me@.txt'
condition: 1 of selection_*
falsepositives:
- Unknown
level: critical
Stages and Predicates
Stage 0: condition
1 of selection_*Stage 1: selection_img
selection_img:
- Image|endswith:
- '\tasksche.exe'
- '\mssecsvc.exe'
- '\taskdl.exe'
- '\taskhsvc.exe'
- '\taskse.exe'
- '\111.exe'
- '\lhdfrgui.exe'
- '\linuxnew.exe'
- '\wannacry.exe'
- Image|contains: 'WanaDecryptor'
Stage 2: selection_cmd
selection_cmd:
CommandLine|contains: '@Please_Read_Me@.txt'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match value:"@Please_Read_Me@.txt" |
Image | ends_with |
| field:"Image" kind:ends_with |
Image | match |
| field:"Image" kind:match value:"WanaDecryptor" |