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Analysis

  • max time kernel
    142s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/04/2024, 13:21

General

  • Target

    c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe

  • Size

    825KB

  • MD5

    a396fe245f20167c4ca851964a04ed82

  • SHA1

    649c7f054b8ea9ea85b2471e48c16256ff9bdb06

  • SHA256

    c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d

  • SHA512

    adf814dbdf0232f6fc600d80c8931a603807902ac64214fc1a6f7af4611f3a539edd9e08eb219b767f9e7693d8423e3943d0bccc9c10454b81a8a3529a2d519a

  • SSDEEP

    12288:+e7f6+LF0YaGXLrS/Kxs/al3diVHJQqYmjXiHIqluOiwuvE1CDpPksEWo:+e7HKYafxilEVHJPYmioqluOUc2Zo

Malware Config

Extracted

Family

djvu

C2

http://sajdfue.com/test2/get.php

Attributes
  • extension

    .uazq

  • offline_id

    Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1

  • payload_url

    http://sdfjhuz.com/dl/build2.exe

    http://sajdfue.com/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0860PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 9 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
    "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4732
    • C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
      "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4288
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\21109f57-f652-48a3-a5e2-9d23166a34c6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:5048
      • C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
        "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4380
        • C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
          "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
            PID:3636
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 568
              5⤵
              • Program crash
              PID:1324
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3636 -ip 3636
      1⤵
        PID:4984

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\21109f57-f652-48a3-a5e2-9d23166a34c6\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe

        Filesize

        825KB

        MD5

        a396fe245f20167c4ca851964a04ed82

        SHA1

        649c7f054b8ea9ea85b2471e48c16256ff9bdb06

        SHA256

        c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d

        SHA512

        adf814dbdf0232f6fc600d80c8931a603807902ac64214fc1a6f7af4611f3a539edd9e08eb219b767f9e7693d8423e3943d0bccc9c10454b81a8a3529a2d519a

      • memory/3636-20-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/3636-21-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/3636-23-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4288-3-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4288-4-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4288-5-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4288-6-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4288-15-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4380-18-0x00000000049C0000-0x0000000004A62000-memory.dmp

        Filesize

        648KB

      • memory/4732-1-0x0000000004940000-0x00000000049E0000-memory.dmp

        Filesize

        640KB

      • memory/4732-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp

        Filesize

        1.1MB