Analysis

  • max time kernel
    143s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 17:11

General

  • Target

    f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe

  • Size

    738KB

  • MD5

    3272f4177ebd454a5d1ba9279f20e1a1

  • SHA1

    fd8a0f709d84c07f79cd21b7ec1aa73e3310b2b0

  • SHA256

    f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d

  • SHA512

    6486a6b6403eaec5640cc657bcce4280af824c8d9318f80d08a7f347068c7dca461bf2998f973ba5ba7085027c5f56d55d91504a6d9b4611d374ab67ff63f047

  • SSDEEP

    12288:MY5C0LI3iARtuv881XKkVrzXyomCOzqlqQE26d:HC0WiAnuHIag26

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes
  • extension

    .vehu

  • 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: 0872PsawqS

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\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
    "C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4788
    • C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
      "C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1328
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\bfb93ab8-d199-42cf-a5fb-cfe7ccc77f1b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2072
      • C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
        "C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:5004
        • C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
          "C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3748

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

    df80f9ba75076db634761b6132e0d4e3

    SHA1

    07983946fb660752c7cccb2ef82d01ec4c9ecc5d

    SHA256

    d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99

    SHA512

    4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a

  • 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

    7ab7f71ca3b66c963f16ced32610976d

    SHA1

    c955b825cf828d5dfbafcebd99e6dcaea67a1046

    SHA256

    519300bbc8fa37d9edd179022cbe6060cf5d61851d041699f20f9623d1a6e542

    SHA512

    de1088561d7df6a6806b230fad1ba6472c16b9ef2dce528fe31c287cba5074f2d8a2ee2606b7282cbb5f12734a49a40de17e694ad5ff817dca722540e9b44167

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

    Filesize

    392B

    MD5

    11f278ecfadd681ed364f1d2378e1c12

    SHA1

    86ca6ba60845cb97e850c3849028735b799607d7

    SHA256

    4f9ab2929062209a0fef639022b39e69aa46473633ca68853a91340f0dd6e5fd

    SHA512

    d4ba5faf3ca38d8a709f0fdb2a2657732a14be4f6107a7725b3e3d13b1d8f1d6d4602c72ff70ba200f5f2a49b76caea59f28cc29a008e2de7ca36ef017b54aaa

  • C:\Users\Admin\AppData\Local\bfb93ab8-d199-42cf-a5fb-cfe7ccc77f1b\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe

    Filesize

    738KB

    MD5

    3272f4177ebd454a5d1ba9279f20e1a1

    SHA1

    fd8a0f709d84c07f79cd21b7ec1aa73e3310b2b0

    SHA256

    f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d

    SHA512

    6486a6b6403eaec5640cc657bcce4280af824c8d9318f80d08a7f347068c7dca461bf2998f973ba5ba7085027c5f56d55d91504a6d9b4611d374ab67ff63f047

  • memory/1328-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1328-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1328-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1328-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1328-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3748-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3748-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3748-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3748-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3748-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3748-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3748-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3748-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3748-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4788-2-0x0000000004140000-0x000000000425B000-memory.dmp

    Filesize

    1.1MB

  • memory/4788-1-0x00000000025C0000-0x0000000002655000-memory.dmp

    Filesize

    596KB