Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    27-04-2024 22:31

General

  • Target

    32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe

  • Size

    807KB

  • MD5

    f22a07f566c981eb20ff0b4919acc695

  • SHA1

    8885990f31137750ca6cf4a4ef90b36942f6f890

  • SHA256

    32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea

  • SHA512

    7dc4983c0bc68bcce53c8420bb4c049e2cab07d509a0ca088f9d0c1e4803ed2c20f90a985f55564ce51edf8a455b6be4f62f199ec3462bff8343d57f1f642bff

  • SSDEEP

    12288:O7L6TRDWnyGDwYzM3JailasHMVD1duYBjSwzP3hINNvYe+l:BVWnDwYM1lJHidugTzRoNQe+

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes
  • extension

    .bgjs

  • offline_id

    Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1

  • 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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 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 2 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\32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe
    "C:\Users\Admin\AppData\Local\Temp\32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3492
    • C:\Users\Admin\AppData\Local\Temp\32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe
      "C:\Users\Admin\AppData\Local\Temp\32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4116
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\804f1d4d-8ced-4b42-b44b-624a22a2324a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4508
      • C:\Users\Admin\AppData\Local\Temp\32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe
        "C:\Users\Admin\AppData\Local\Temp\32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:720
        • C:\Users\Admin\AppData\Local\Temp\32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe
          "C:\Users\Admin\AppData\Local\Temp\32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2148

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\804f1d4d-8ced-4b42-b44b-624a22a2324a\32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea.exe

    Filesize

    807KB

    MD5

    f22a07f566c981eb20ff0b4919acc695

    SHA1

    8885990f31137750ca6cf4a4ef90b36942f6f890

    SHA256

    32ca82ed5bd55e19ba8bbfe9381b52c3b6c0231ccd468bf52582e14c17e001ea

    SHA512

    7dc4983c0bc68bcce53c8420bb4c049e2cab07d509a0ca088f9d0c1e4803ed2c20f90a985f55564ce51edf8a455b6be4f62f199ec3462bff8343d57f1f642bff

  • memory/720-14-0x0000000001D80000-0x0000000001E1A000-memory.dmp

    Filesize

    616KB

  • memory/2148-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2148-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2148-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2148-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2148-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2148-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2148-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2148-16-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2148-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2148-18-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3492-1-0x0000000001D70000-0x0000000001E0E000-memory.dmp

    Filesize

    632KB

  • memory/3492-2-0x0000000003840000-0x000000000395B000-memory.dmp

    Filesize

    1.1MB

  • memory/4116-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4116-12-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4116-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4116-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4116-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB