Analysis

  • max time kernel
    150s
  • max time network
    150s
  • 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, 09:50

General

  • Target

    a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe

  • Size

    771KB

  • MD5

    3a8a7c0a60f77b76feac5c6f736119b8

  • SHA1

    1966c2a7262aa4161958f168c4bc75dee4a291f4

  • SHA256

    a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f

  • SHA512

    3b29ffe7c556245f91838282a3667f097ff951936d3f3e054a3ae8d766c06605568f59c5020547e58523bf849ac5ac30f15d29363315c2c1b69a45953ac7d2d2

  • SSDEEP

    12288:ULaenOBDWTYc0uPoGKe6twNgOlj+eOnnkB35Xs5d6IdBuASBBhxlsz6A3SfpQO3:LIYpGh6twiu+eOnkq6HASrFsmA34OO3

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\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
    "C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1352
    • C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
      "C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2244
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\622f7fcd-b718-4e50-bc6a-c98eee1b9528" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4876
      • C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
        "C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3628
        • C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
          "C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3148

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

          a791dc660eb1a20532715092eec9e1a2

          SHA1

          0d5e484ddf9c2d25e8c856d8447a9adcf113300b

          SHA256

          63ad6f14dedb9e1d22bc2a5bff7af908b9ada094d211559d596ac7395dbc0f6d

          SHA512

          6c2929b0dd28dd4fe4887df2ac95968deca1cdd91a1002ee1fcc99073f34460c16ff187e4b3f9ecd827d8cc1ea7543d6fa46944130c2c8681d88213d17574c13

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

          Filesize

          392B

          MD5

          edeaeee2db8bf0c849c0de68474259e4

          SHA1

          eb132a6b4a11481c50491978795fe9821f2ef966

          SHA256

          c90d48e9112a020d890e99083fdbb3b4dba2d79af2684fc7d032549b2a25731e

          SHA512

          d04f79278105cf40f350f7b7b70c2cacf710dcdc3f3d73c5105ac6e6249508db136d675371718729996c144fa7577d38b6197e5a5779919e72c71ff53e4ee3b2

        • C:\Users\Admin\AppData\Local\622f7fcd-b718-4e50-bc6a-c98eee1b9528\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe

          Filesize

          771KB

          MD5

          3a8a7c0a60f77b76feac5c6f736119b8

          SHA1

          1966c2a7262aa4161958f168c4bc75dee4a291f4

          SHA256

          a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f

          SHA512

          3b29ffe7c556245f91838282a3667f097ff951936d3f3e054a3ae8d766c06605568f59c5020547e58523bf849ac5ac30f15d29363315c2c1b69a45953ac7d2d2

        • memory/1352-1-0x0000000004B50000-0x0000000004BE8000-memory.dmp

          Filesize

          608KB

        • memory/1352-2-0x0000000004BF0000-0x0000000004D0B000-memory.dmp

          Filesize

          1.1MB

        • memory/2244-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2244-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2244-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2244-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2244-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-30-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3148-39-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3628-20-0x00000000048C0000-0x000000000495B000-memory.dmp

          Filesize

          620KB