SigmaHQ/rules/windows/malware/sysmon_malware_wannacry.yml

title: WannaCry Ransomware via Sysmon
status: experimental
description: Detects WannaCry ransomware activity via Sysmon
reference: https://www.hybrid-analysis.com/sample/ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa?environmentId=100
author: Florian Roth (rule), Tom U. @c_APT_ure (collection) 
logsource:
    product: windows
    service: sysmon
detection:
    selection1:
        EventID: 1
        Image:
            - '*\tasksche.exe'
            - '*\mssecsvc.exe'
            - '*\taskdl.exe'
            - '*\@WanaDecryptor@*'
            - '*\taskhsvc.exe'
            - '*\taskse.exe'
            - '*\111.exe'
            - '*\lhdfrgui.exe'
            - '*\diskpart.exe'  # Rare, but can be false positive
            - '*\linuxnew.exe'
            - '*\wannacry.exe'
    selection2:
        EventID: 1
        CommandLine:
            - '*vssadmin delete shadows*'
            - '*icacls * /grant Everyone:F /T /C /Q*'
            - '*bcdedit /set {default} recoveryenabled no*'
            - '*wbadmin delete catalog -quiet*'
            - '*@Please_Read_Me@.txt*'
    condition: selection1 or selection2
falsepositives:
    - Diskpart.exe usage to manage partitions on the local hard drive
level: critical