Analysis

  • max time kernel
    144s
  • max time network
    123s
  • 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 10:22

General

  • Target

    31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe

  • Size

    707KB

  • MD5

    10d7f2ef729dae9b14dce2ffd23a4f68

  • SHA1

    cf087763472d322312bbfdcb7d5cc226f5b555b8

  • SHA256

    31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a

  • SHA512

    25181f93d725513facbb00cf309a9caf17e4ddd57e841567c2c364aedbb1ef0e07b499324c277345867eb13504474367452b92ba9862495908365d7d52527fbb

  • SSDEEP

    12288:qjXryfVBE2pamRANWTRawlSZut27FU1cuZivt6Lqg:qjXyExj6t87WA6L

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\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
    "C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4156
    • C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
      "C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3060
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\903cbbbf-23d3-4833-9f59-0a7d6c3c428a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:5036
      • C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
        "C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4728
        • C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
          "C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:352

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

    6fe3d5224be209069852716076fe610f

    SHA1

    d12dcd9daceeb51f0aded0aafc6037870178c9e1

    SHA256

    cf3e8ee6650531f3fc721606bcf6743e8879e8a14bcbd22c182b2c48b9a7e7a0

    SHA512

    9c76c3434469e3fb368a3527a152135699aac08012ae919d2dc1c62775528cecf14c11bdafb05f9c8a1594269a4f22b3836ddfb4b5ef3781775d141f562e542a

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

    Filesize

    392B

    MD5

    b77b7c914c3a9b42377f56fb2ca46b42

    SHA1

    af41e4b2c796200699e34752114329c1ad8e1d81

    SHA256

    e33aaa014c8d92462efc4dde7a0f794336054cfed8fd1e570f5b49f91bf69423

    SHA512

    272af9666ab7b5cb57768d9ca738d8977f2c7dce47f1557392f7ebeb79b9be6a0c634e6afcfc6deefdbc068e534d6d9577c6f3fbcdbc384c05f8c5fb5442c68b

  • C:\Users\Admin\AppData\Local\903cbbbf-23d3-4833-9f59-0a7d6c3c428a\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe

    Filesize

    707KB

    MD5

    10d7f2ef729dae9b14dce2ffd23a4f68

    SHA1

    cf087763472d322312bbfdcb7d5cc226f5b555b8

    SHA256

    31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a

    SHA512

    25181f93d725513facbb00cf309a9caf17e4ddd57e841567c2c364aedbb1ef0e07b499324c277345867eb13504474367452b92ba9862495908365d7d52527fbb

  • memory/352-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/352-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/352-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/352-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/352-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/352-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/352-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/352-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/352-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3060-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3060-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3060-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3060-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3060-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4156-2-0x0000000004B00000-0x0000000004C1B000-memory.dmp

    Filesize

    1.1MB

  • memory/4156-1-0x0000000004A30000-0x0000000004ACE000-memory.dmp

    Filesize

    632KB