Analysis

  • max time kernel
    144s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 12:52

General

  • Target

    3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe

  • Size

    710KB

  • MD5

    f47cff4805227d54842556b0bddaaf7e

  • SHA1

    f734391825c9028127d49fd00dcfcc24aa801eaa

  • SHA256

    3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19

  • SHA512

    369af8e8e589126accc108c5e86484ce71d57646b2a7ee436cc2a1a0d71ca57422681590300215b4606306d5f9df6e1264c7ec8d87da8ccf12f8054a67f8964b

  • SSDEEP

    12288:BidJzy+JS1wz8BcokecNRgMjBoVvS27EjYkWTa5310Wh44Zh3Pfp6/yA2m:Bid1vJS1xcokeUsvS27wG4nfB6KA2m

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .vepi

  • offline_id

    EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1

  • payload_url

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

    http://cajgtus.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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 16 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\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
    "C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1056
    • C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
      "C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1020
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\1165bd64-e9b1-416c-8aec-766984f9cf96" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:384
      • C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
        "C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2800
        • C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
          "C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:444
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4088,i,5711962389779687290,1245653010537220991,262144 --variations-seed-version --mojo-platform-channel-handle=4060 /prefetch:8
    1⤵
      PID:1112

    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

      6728aea2631b86a76c237508d8ba9b55

      SHA1

      7a670f95cac088313f7558869162fe01c6dc0ec9

      SHA256

      e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b

      SHA512

      533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5

    • 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

      f3dc1d7791baccc6291802b8f9d0991d

      SHA1

      038ca35f7d86b8cc6275dcfae96966807625c78a

      SHA256

      40779d5f251e941d71bd92a992552462ecc9fdfffe60347743168883864a66ef

      SHA512

      be773163d4437e373d347e8d1aa1cdfe822da997c75d4c4dcd5d3d7ae08dd6a38cd2e8c935fe563b068485d710889b599bdf19c4284ecc75fd8904f025156eae

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

      Filesize

      392B

      MD5

      077b021d03335a7e233377766c4e97aa

      SHA1

      8be9bed088ffcfc2d12d8b2247d8d73d09e91034

      SHA256

      f72c08d5c0097839018b863e63023f98789a9fc5f32728d8434bc112717b6907

      SHA512

      5b240557b3738a9b05c55231066b0384fd5099bfd8ba6d0789845fc7aaab0375c9492fdd09bc36fe5b6e136ef423ad8c9bbc11ffd10b392e885eeb47d26fad41

    • C:\Users\Admin\AppData\Local\1165bd64-e9b1-416c-8aec-766984f9cf96\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe

      Filesize

      710KB

      MD5

      f47cff4805227d54842556b0bddaaf7e

      SHA1

      f734391825c9028127d49fd00dcfcc24aa801eaa

      SHA256

      3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19

      SHA512

      369af8e8e589126accc108c5e86484ce71d57646b2a7ee436cc2a1a0d71ca57422681590300215b4606306d5f9df6e1264c7ec8d87da8ccf12f8054a67f8964b

    • memory/444-28-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/444-35-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/444-37-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/444-20-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/444-22-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/444-36-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/444-34-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/444-32-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/444-29-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/444-27-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1020-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1020-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1020-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1020-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1020-17-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1056-1-0x0000000004940000-0x00000000049D5000-memory.dmp

      Filesize

      596KB

    • memory/1056-2-0x0000000004AA0000-0x0000000004BBB000-memory.dmp

      Filesize

      1.1MB