Overview

overview

10

Static

static

WannaHappy.exe

windows7_x64

WannaHappy.exe

windows10_x64

Sharing

Copy URL
Twitter E-mail

General

  • Target

    WannaHappy.exe

  • Size

    220KB

  • Sample

    210213-sljee9nq2s

  • MD5

    fa187b42e289bbc3fe867ad23fa1a19c

  • SHA1

    ecd00be8d18551267445e8777522c92591a45419

  • SHA256

    c609f8ade568e817601f912dc17cc1e00bd684d212a934533eaa588b2834a860

  • SHA512

    fb57e94ebe15b4ab732e52e3081c0607a770e3b879440c3a764e019646cb60f393fdd55cdb6e47836fa08a85a1d001e907121a786d172613527c04dc9b3a693c

Score
10/10
bootkitevasionpersistenceransomware

Malware Config

Targets

    • Target

      WannaHappy.exe

    • Size

      220KB

    • MD5

      fa187b42e289bbc3fe867ad23fa1a19c

    • SHA1

      ecd00be8d18551267445e8777522c92591a45419

    • SHA256

      c609f8ade568e817601f912dc17cc1e00bd684d212a934533eaa588b2834a860

    • SHA512

      fb57e94ebe15b4ab732e52e3081c0607a770e3b879440c3a764e019646cb60f393fdd55cdb6e47836fa08a85a1d001e907121a786d172613527c04dc9b3a693c

    Score
    10/10
    evasionpersistenceransomwarebootkit

    • Modifies WinLogon for persistence

      persistence

    • Disables Task Manager via registry modification

      evasion

    • Modifies WinLogon to allow AutoLogon

      Enables rebooting of the machine without requiring login credentials.

      ransomwarebootkit

    • Drops desktop.ini file(s)

    • Enumerates physical storage devices

      Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

2
T1004

Privilege Escalation

Defense Evasion

Modify Registry

4
T1112

Credential Access

Discovery

System Information Discovery

2
T1082

Query Registry

1
T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Defacement

1
T1491

Tasks