Analysis

  • max time kernel
    146s
  • max time network
    152s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    22-05-2024 00:03

General

  • Target

    3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe

  • Size

    805KB

  • MD5

    c809827be1c79e65c9dd86e78d7c53f1

  • SHA1

    ba0403ea800d5b0e68888543f6ca0921f753ddd1

  • SHA256

    3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8

  • SHA512

    ad47c68490b7c34b0ae8001d59071cbf1888de7bb72be29922dc0c3e1eea1624bc1a4dfd6481cc06281363c54d170bbfa37a43b1e720721b18b5813d23ad45c5

  • SSDEEP

    12288:ofdavAM3xfGM4YJYFdxFQ09Lbl7Pq3/RSVAlGO+MUzE:+dazfGM4kYdFfLbl7PqUalZoI

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.

  • 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\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
    "C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4132
    • C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
      "C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1696
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\68c30bef-ea8c-43e6-9d87-e39d860b5d94" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:792
      • C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
        "C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1512
        • C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
          "C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3292

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

    a1d955617a4d146e70544d0d9a0390ca

    SHA1

    5ffdc4453b23e24a7cb0e634b26864c169f5257b

    SHA256

    8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3

    SHA512

    0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810

  • 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

    fc645c046b61028ac135d6484834cb8f

    SHA1

    0f53da2cd7bd5b6b695f47ebefc6b1c698fe8019

    SHA256

    0adc0b994b1509aeec734e92f21f5c329aaec02fd7d56d403269df9a1caea6c4

    SHA512

    567f0a47bdc02fac646e1aef827c20c9346581337838dd3585f383aa764213fc627261d26b921bc24ab48d242abeb29235eba43b49cfaa2ed969d2b15237a13c

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

    Filesize

    392B

    MD5

    7a00c45f57b41d4648d4a405aeca7a8b

    SHA1

    b888be9f54e7b25cae3c695ede5c9d7b13dea882

    SHA256

    5251445e4ea5898e0729257f732a7739523d59abd1316f497162c52ad5d8ddb2

    SHA512

    0f4e384b1df95ac59a53ba81bdb6bbc46114c2f4d3a89ecab0d16cf9d9888eb05fe15f53d5eb7b0e01c69b6ff21b7b4727537601020c713c4bfe0e61da63cd32

  • C:\Users\Admin\AppData\Local\68c30bef-ea8c-43e6-9d87-e39d860b5d94\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe

    Filesize

    805KB

    MD5

    c809827be1c79e65c9dd86e78d7c53f1

    SHA1

    ba0403ea800d5b0e68888543f6ca0921f753ddd1

    SHA256

    3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8

    SHA512

    ad47c68490b7c34b0ae8001d59071cbf1888de7bb72be29922dc0c3e1eea1624bc1a4dfd6481cc06281363c54d170bbfa37a43b1e720721b18b5813d23ad45c5

  • memory/1696-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1696-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1696-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1696-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1696-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3292-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3292-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3292-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3292-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3292-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3292-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3292-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3292-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3292-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4132-1-0x00000000025D0000-0x0000000002670000-memory.dmp

    Filesize

    640KB

  • memory/4132-2-0x00000000041C0000-0x00000000042DB000-memory.dmp

    Filesize

    1.1MB