Analysis

  • max time kernel
    141s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 19:14

General

  • Target

    a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe

  • Size

    710KB

  • MD5

    8858045135c3537e4cc0ea6c49532cc4

  • SHA1

    03ea0b26b5766dfcf0cb376a408251755bb608f5

  • SHA256

    a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5

  • SHA512

    24edb6df506ed00d808f69e6494cdbaafa98c3387e698f2a0312b4feecf1a4008959c18e55f4b2ac62e488728cc0988d5b6b447c62b4e8b48b8faf4f1ea7a879

  • SSDEEP

    12288:YIJja8HJIClsdRWU9A9NfLfMs46sa97pOeMcgobLEk8MAz:/a8HVukU96dw4lOeMmb45

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\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
    "C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:404
    • C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
      "C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:856
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\335fcf07-9df7-4d3d-b6ef-17f5c081e04e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4356
      • C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
        "C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3300
        • C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
          "C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4768

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

    991e196c1a868bec1d72cff5e169b98a

    SHA1

    d3c9d775393ba7aa6e8369dcce8348ae75efff90

    SHA256

    6dd434bcb6027f43d2b87519e7657fd4b62b356aaeb7c9db7ef25a0b3657bbc8

    SHA512

    c903f9393fffb9566f5f2038902ad7aab8046a6ad8cca38e46b609ce5eb9ed2975c746fa3456626770badd2624390bc337c532140bf29393028d95463f42fb69

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

    Filesize

    392B

    MD5

    bb94a67d131c34761ddfe7f90d464b05

    SHA1

    5535ea164296be3e24a24395a53939ee381c27af

    SHA256

    fddfc5e2266dbb086164d4805589b85adacede43f1ae9f447bb55ba369979781

    SHA512

    0fa6ab12ad6d94f946319ac01e115e2ca29c3a5da29841c583ba532733729d050dae25c5bac2edf64ed3e3cef023650912d73c9bd959030ae2c2547b17c4b7b4

  • C:\Users\Admin\AppData\Local\335fcf07-9df7-4d3d-b6ef-17f5c081e04e\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe

    Filesize

    710KB

    MD5

    8858045135c3537e4cc0ea6c49532cc4

    SHA1

    03ea0b26b5766dfcf0cb376a408251755bb608f5

    SHA256

    a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5

    SHA512

    24edb6df506ed00d808f69e6494cdbaafa98c3387e698f2a0312b4feecf1a4008959c18e55f4b2ac62e488728cc0988d5b6b447c62b4e8b48b8faf4f1ea7a879

  • memory/404-2-0x0000000004150000-0x000000000426B000-memory.dmp

    Filesize

    1.1MB

  • memory/404-1-0x0000000002510000-0x00000000025AD000-memory.dmp

    Filesize

    628KB

  • memory/856-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/856-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/856-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/856-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/856-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4768-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4768-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4768-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4768-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4768-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4768-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4768-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4768-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4768-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB