Analysis

  • max time kernel
    143s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    22-05-2024 10:01

General

  • Target

    645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe

  • Size

    702KB

  • MD5

    dd1cb88ac4542fea3c32b4ff7c60483e

  • SHA1

    b4b716636014911d002c72ca8e35fb90c7074b76

  • SHA256

    645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012

  • SHA512

    df9929a028576507fbf9307a723877eee25463868499c10d3b2c45defd665331f2425e96a6ad2035f7baa6a0c2fe3a75830d56a9bfc8ae44f1e846043d9f12f1

  • SSDEEP

    12288:WRuDXAgdLFderRBGPHzyoqJnG7suDKkrq3Daa1qG7GXiLSG4Bfp5C:WREdLXRPGBJG7Rekrq32awCSiLSPV

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.

  • 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\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
    "C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:5100
    • C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
      "C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5048
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\e79973e8-e286-4d03-b4a9-962f6e104a95" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2992
      • C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
        "C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:104
        • C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
          "C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1364

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

    195fc28150bef9b30510eed36fb325af

    SHA1

    1ea8a314d8af1d431b77d5280d1782e9a8e867c6

    SHA256

    5c2e51ccf5767f80257a0a0bb66dee40957e5379431e15a118e7f1343ad1f6e0

    SHA512

    537da7e46d8b5afc796c1908042088c583c5380fb729f3665845fe36286b3efeaec9fa26475e9c2263f55b1eca04bd7ae26088a9a85950b2b7f750fd24eadcfc

  • 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

    133d62f51f9606e085206c87e3c2c095

    SHA1

    bf3e8aedb2f92b12055730cd544cc4ebe79b45f8

    SHA256

    e0a4a861ec64fe9a3cdd73b2ff7bcdf626e4a965ee22d39a31721b80702d9898

    SHA512

    f8c28a01bf141a43da0b7d0192b27762ddf2ba183fcde5d9f2eb34d96bfdd8046adc1d63211a878b210c1e7abd1f4b3484aa043312b28835dccafc61fbfc8f9b

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

    Filesize

    392B

    MD5

    b464283a9104c250b476065b838d6e92

    SHA1

    e6e224b83f022df7eb31dc01d4a7bf3a6506b029

    SHA256

    61c2803fd69a3da8d7747c71fbf9fbd6c1d1b34a1b7b8ae5fd77c65ca8de64b9

    SHA512

    e09b5056794018eb4d48e43512c724796b96c0ae028686d6f16db7546f230a9f2294ecef035c37a096dc97695f273dc5f4347d8c0ad9a624b8557427b537b3cb

  • C:\Users\Admin\AppData\Local\e79973e8-e286-4d03-b4a9-962f6e104a95\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe

    Filesize

    702KB

    MD5

    dd1cb88ac4542fea3c32b4ff7c60483e

    SHA1

    b4b716636014911d002c72ca8e35fb90c7074b76

    SHA256

    645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012

    SHA512

    df9929a028576507fbf9307a723877eee25463868499c10d3b2c45defd665331f2425e96a6ad2035f7baa6a0c2fe3a75830d56a9bfc8ae44f1e846043d9f12f1

  • memory/1364-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1364-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1364-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1364-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1364-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1364-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1364-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1364-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1364-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5048-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5048-2-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5048-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5048-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5048-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5100-1-0x0000000004AA0000-0x0000000004B3C000-memory.dmp

    Filesize

    624KB

  • memory/5100-5-0x0000000004B60000-0x0000000004C7B000-memory.dmp

    Filesize

    1.1MB