Resubmissions

15/06/2025, 19:42

250615-yenkgabj3t10

09/02/2025, 03:10

250209-dn49cstkez10

08/06/2024, 08:50

240608-krvyesae9110

08/05/2024, 16:15

240508-tqnx6ach3w10

08/05/2024, 16:07

240508-tkr3mafa5410

01/05/2024, 18:02

240501-wmf49acg3s6

27/04/2024, 08:46

240427-kpfeysff8s10

26/04/2024, 17:56

240426-wh2v6ahg8v

25/04/2024, 21:25

240425-z9y55afb7v10

25/04/2024, 21:16

240425-z4pphafa9710

General

  • Target
    Malware.zip
  • Size 6.4MB
  • Sample240425-z4pphafa97
  • SHA256 2a45e44be359fba4c85591e7b13d1ec772ed181adc41254d8b00d31b2d15878e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • wannacry

Ransom Note
  • Q: What's wrong with my files? A: Ooops, your important files are encrypted. It means you will not be able to access them anymore until they are decrypted. If you follow our instructions, we guarantee that you can decrypt all your files quickly and safely! Let's start decrypting! Q: What do I do? A: First, you need to pay service fees for the decryption. Please send $300 worth of bitcoin to this bitcoin address: 13AM4VW2dhxYgXeQepoHkHSQuy6NgaEb94 Next, please find an application file named "@[email protected]". It is the decrypt software. Run and follow the instructions! (You may need to disable your antivirus for a while.) Q: How can I trust? A: Don't worry about decryption. We will decrypt your files surely because nobody will trust us if we cheat users. * If you need our assistance, send a message by clicking <Contact Us> on the decryptor window. �
Wallets
  • 13AM4VW2dhxYgXeQepoHkHSQuy6NgaEb94

Targets

    • Target
      000.exe
    • Size 6.7MB
    • SHA256 4ea1f2ecf7eb12896f2cbf8683dae8546d2b8dc43cf7710d68ce99e127c0a966
    • MD5 SHA1 SHA512 SSDEEP
    • Disables Task Manager via registry modification

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Modifies WinLogon

    • Sets desktop wallpaper using registry

    • Target
      Ana.exe
    • Size 2.1MB
    • SHA256 117d7af0deb40b3fe532bb6cbe374884fa55ed7cfe053fe698720cdccb5a59cb
    • MD5 SHA1 SHA512 SSDEEP
    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Executes dropped EXE

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Drops file in System32 directory

    • Target
      Bad Rabit.exe
    • Size 431KB
    • SHA256 630325cac09ac3fab908f903e3b00d0dadd5fdaa0875ed8496fcbb97a558d0da
    • MD5 SHA1 SHA512 SSDEEP
    • BadRabbit

      Ransomware family discovered in late 2017, mainly targeting Russia and Ukraine.

    • Mimikatz

      mimikatz is an open source tool to dump credentials on Windows.

    • mimikatz is an open source tool to dump credentials on Windows

    • Executes dropped EXE

    • Loads dropped DLL

    • Target
      Desktop Puzzle.exe
    • Size 239KB
    • SHA256 1f5a26f24a2bfdd301008f0cc51a6c3762f41b926f974c814f1ecaa4cb28e5e6
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10
    • Target
      Memz.exe
    • Size 14KB
    • SHA256 a3d5715a81f2fbeb5f76c88c9c21eeee87142909716472f911ff6950c790c24d
    • MD5 SHA1 SHA512 SSDEEP
    Score
    6/10
    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Target
      NoEscape.exe
    • Size 666KB
    • SHA256 d30d7676a3b4c91b77d403f81748ebf6b8824749db5f860e114a8a204bca5b8f
    • MD5 SHA1 SHA512 SSDEEP
    • Target
      WannaCrypt0r.exe
    • Size 3.4MB
    • SHA256 ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa
    • MD5 SHA1 SHA512 SSDEEP
    • Wannacry

      WannaCry is a ransomware cryptoworm.

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v15

Tasks