Analysis

  • max time kernel
    149s
  • max time network
    158s
  • 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 18:20

General

  • Target

    50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe

  • Size

    708KB

  • MD5

    c991e828e97d9e583ff042e5891d9999

  • SHA1

    12b6ab69ee99c0c5cb5b4f413f24e84d438b2d96

  • SHA256

    50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f

  • SHA512

    f65fcd02981c1a4eea592486ccb6b592fe646dbac48b0104586bf06f96a65124916c9f456ac588411b2b9dc434ede958977cdf47550e957623a1e1c6960573fb

  • SSDEEP

    12288:tnsGKEfpDplHlPCBMPmpE0NuaAidBVlB+Nze9qXX0S6CjXf23:tsxYpDp9ZCBMI/uaAOug9OfXf4

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 15 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\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
    "C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3012
    • C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
      "C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3444
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\87c61868-8efa-4019-8824-2c994fbeca4a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3224
      • C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
        "C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3596
        • C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
          "C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3604

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

    adead621f2288e26195653c887983fde

    SHA1

    c3e0d98297fd75d9fedfb384dee90a52d81cedf3

    SHA256

    7d82a598981d48e84bf1c2e5e3b7a64338fd1b7ce6c9a38669cb9474171a6f96

    SHA512

    aa810f10532357a96ed94b00404bfffa394c828e4f0f0bd6ec1a029f2d10b296a008daf1160d1fb166feeaded5e100f1ed12a59be117a551b1c78c08dc0306fe

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

    Filesize

    392B

    MD5

    a4afb99c6884f5a84aa96b483af9125f

    SHA1

    e80d4ee7937e8622d0c3d1533a81e6e106422e62

    SHA256

    a7f38e972e84069b072fe9ac12605591274a3e5f5a63e4f9d672c05e6ae63fac

    SHA512

    30ec705b8b984083677bd7b7a86591f4966bc1012a8931977b9e0ab60e9dda11530a673d65ffa5a99d079a362b0138a1340d5ddbc433c3bf6929d6e5b9420593

  • C:\Users\Admin\AppData\Local\87c61868-8efa-4019-8824-2c994fbeca4a\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe

    Filesize

    708KB

    MD5

    c991e828e97d9e583ff042e5891d9999

    SHA1

    12b6ab69ee99c0c5cb5b4f413f24e84d438b2d96

    SHA256

    50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f

    SHA512

    f65fcd02981c1a4eea592486ccb6b592fe646dbac48b0104586bf06f96a65124916c9f456ac588411b2b9dc434ede958977cdf47550e957623a1e1c6960573fb

  • memory/3012-2-0x0000000004230000-0x000000000434B000-memory.dmp

    Filesize

    1.1MB

  • memory/3012-1-0x00000000024D0000-0x0000000002562000-memory.dmp

    Filesize

    584KB

  • memory/3444-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3444-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3444-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3444-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3444-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3604-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3604-25-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3604-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3604-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3604-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3604-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3604-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3604-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3604-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB