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Analysis

  • max time kernel
    291s
  • max time network
    264s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    01/05/2024, 22:47

General

  • Target

    2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe

  • Size

    802KB

  • MD5

    0779bb0f196e0f569113456aac677a3d

  • SHA1

    fe8c4330c4a00c6931c68a41fee99bede478a902

  • SHA256

    2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a

  • SHA512

    73cee4415e796d71ca6b3b91f95a917fb8c926453279210c0500c17d8b2292e4183588b4dbd6293ff9945cee0dc0ef921e7316c2500106254eb4e34ada8c86fe

  • SSDEEP

    12288:99WFA2R+3gfJn0qEH5S6xuyu1TUDJmHiYyMVEUcejAFTFHDkT6jj7PjEbhV:ChaLxuNtXioVSJHDkTQjbjEbh

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .bgjs

  • offline_id

    Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1

  • 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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • 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\2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe
    "C:\Users\Admin\AppData\Local\Temp\2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4196
    • C:\Users\Admin\AppData\Local\Temp\2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe
      "C:\Users\Admin\AppData\Local\Temp\2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4968
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\0fd29864-55a6-439c-a6cf-6433cefa50cc" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4428
      • C:\Users\Admin\AppData\Local\Temp\2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe
        "C:\Users\Admin\AppData\Local\Temp\2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4336
        • C:\Users\Admin\AppData\Local\Temp\2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe
          "C:\Users\Admin\AppData\Local\Temp\2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4780

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

    56282e3f56542f67e60909a4345c5a35

    SHA1

    1a627ec9980ee9e3f5846da3b63552122032f78b

    SHA256

    719698173bbfbb3375c5e0c43342f785c76727fcd6560364e0d9bec77232a6f5

    SHA512

    291a1569239659ae5c1466d324f6c0114653f2b1578e59f1f340decf189aa38ccf9599c2005551e09ce94f2bceb94f64773181fc011dc1167edd4aa9b1b4d11e

  • 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

    31e46469000b13498d38559df53d73ec

    SHA1

    8e1a0270df046ad93e5103a008c944633bb01c16

    SHA256

    0b29551384baf79c75a89dad168c622505abe1c11caca9d0dba6dc0b4fbd1686

    SHA512

    cd00500d6f4e9963315367325dac3e1a94d695c383d629d2fa7a650c27c755b9d8a2b5b2c068a73a14240f60761659fc84c6f5de475061672c52f2056c0a68da

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

    Filesize

    392B

    MD5

    aab65b8e274c114b5e5638cf538d4b7b

    SHA1

    be54be0d075636b2f30958ed63c0d73df306ff4c

    SHA256

    1842903b62f19e5026639ba67fa9b9232dd3803cedd93ae8f2fd8b746b6f8a48

    SHA512

    f014f64f3d38b07504c3f6ccdf950c9770b958cecaef30d8ccba62af1331ccd210efc74477712824b06a0f9ac2cf9726507697af62450ce8cb6c56bcc6013fc6

  • C:\Users\Admin\AppData\Local\0fd29864-55a6-439c-a6cf-6433cefa50cc\2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a.exe

    Filesize

    802KB

    MD5

    0779bb0f196e0f569113456aac677a3d

    SHA1

    fe8c4330c4a00c6931c68a41fee99bede478a902

    SHA256

    2f82408849237d1795ad71007139db9b9cd99d77f97554a71f0d34821870756a

    SHA512

    73cee4415e796d71ca6b3b91f95a917fb8c926453279210c0500c17d8b2292e4183588b4dbd6293ff9945cee0dc0ef921e7316c2500106254eb4e34ada8c86fe

  • memory/4196-2-0x0000000003650000-0x000000000376B000-memory.dmp

    Filesize

    1.1MB

  • memory/4196-1-0x0000000001D00000-0x0000000001DA2000-memory.dmp

    Filesize

    648KB

  • memory/4780-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4780-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4780-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4780-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4780-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4780-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4780-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4780-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4968-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4968-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4968-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4968-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4968-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB