Analysis

  • max time kernel
    143s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/04/2024, 05:01

General

  • Target

    b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe

  • Size

    771KB

  • MD5

    2a980de49d376b3ce74a9e0d2b62e162

  • SHA1

    b135b43dfcd38f3d92c8ef89d0c672cb3f297cab

  • SHA256

    b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027

  • SHA512

    1f4b5f99cba10082b9f7a7f83e716cebcc711e45fafd932ef255bcd2aef10ff37d8063cffffb5b1af7fa3d6ffef6435a2f66bb715c280579e90d04c44f4d81a5

  • SSDEEP

    12288:IPiZoikvkDSY0wImPo85s6Gt81RCwiZMNHjpfVsRcdFzVkxjgehS6:gLYzQ85xGORLiGpfucdFzWBhS6

Malware Config

Extracted

Family

djvu

C2

http://sajdfue.com/test1/get.php

Attributes
  • extension

    .uajs

  • 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: 0859PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 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 3 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).

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe
    "C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4672
    • C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe
      "C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3636
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\51402f06-36d5-4d80-9671-702a5350ffaa" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4864
      • C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe
        "C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3832
        • C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe
          "C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1520

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          1KB

          MD5

          fc5408c48a55314c72e200b74330cac4

          SHA1

          7e8889ec3189a40e6078088927bf3612753fa628

          SHA256

          7ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4

          SHA512

          481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          724B

          MD5

          8202a1cd02e7d69597995cabbe881a12

          SHA1

          8858d9d934b7aa9330ee73de6c476acf19929ff6

          SHA256

          58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

          SHA512

          97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          410B

          MD5

          bbb080f9ce644f4b03214e9bf6cc2ac8

          SHA1

          1f8fd9f2d647d8fa9e1e8e76e28851d35dc66fe7

          SHA256

          a27c6ff53b736e4ac3dec797e94e344530e2b8e7039ab793fea1fb449ccfaffb

          SHA512

          af5f915e5dda969b959d7b8d6c2f6d4c0fd675777e78719014854531515054a0415f43ee1ebca47ae8551a5c94cc4807f2672fb11d5067ebeb29fd566d4a6dc8

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          392B

          MD5

          f1496e2986ccf20cedfb6aa7817ca304

          SHA1

          b3d0a7cfdd0799349a251bb82d2c8079eb150bcb

          SHA256

          5c7e05ed4160c9d9d534938d7cbd8fe8f0a44876d28f8e1c584f47669a38beec

          SHA512

          a3fe2a5e2fe0a5a56f7206943e585a3fc18d6b459738851961108f1e632f8d813fda672a95129b3cbabd50f41e651182c0bd574df2ee025c4b7f313138d5f4f9

        • C:\Users\Admin\AppData\Local\51402f06-36d5-4d80-9671-702a5350ffaa\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe

          Filesize

          771KB

          MD5

          2a980de49d376b3ce74a9e0d2b62e162

          SHA1

          b135b43dfcd38f3d92c8ef89d0c672cb3f297cab

          SHA256

          b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027

          SHA512

          1f4b5f99cba10082b9f7a7f83e716cebcc711e45fafd932ef255bcd2aef10ff37d8063cffffb5b1af7fa3d6ffef6435a2f66bb715c280579e90d04c44f4d81a5

        • memory/1520-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-20-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-32-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1520-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3636-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3636-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3636-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3636-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3636-15-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3832-18-0x0000000004A50000-0x0000000004AE9000-memory.dmp

          Filesize

          612KB

        • memory/4672-2-0x0000000004AB0000-0x0000000004BCB000-memory.dmp

          Filesize

          1.1MB

        • memory/4672-1-0x0000000004A10000-0x0000000004AAE000-memory.dmp

          Filesize

          632KB