Analysis

  • max time kernel
    106s
  • max time network
    112s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-07-2024 02:44

General

  • Target

    5c171af1b9174fd62c8a9e3f2de9df00N.exe

  • Size

    888KB

  • MD5

    5c171af1b9174fd62c8a9e3f2de9df00

  • SHA1

    88586368c833ce427e3e28af0a7bd5a18b0add4c

  • SHA256

    856fed29facb17f62dd6449b1cfabe65de2b8cb478e52417e7c0069bde7db864

  • SHA512

    5675000af023d8c2f1c4c9091f4356178ec2c8975f66ad259483ea02c9bf458280449143d64ad13ec2b65f81380da80eb7a835546752fbbfa1c917f5553f4af1

  • SSDEEP

    24576:4TJYdNu+4/LN1WKVQ7A6WNETiczoc9myk:4GV4/LK+pPwRNmy

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .watz

  • offline_id

    Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1

  • payload_url

  • 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/abe121434ad837dd5bdd03878a14485820240531135509/34284d 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: 0874PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 9 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 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).

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
    "C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2376
    • C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
      "C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1328
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\32a17bb1-8f22-430d-8bcc-e4ec3958227a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:4000
      • C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
        "C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2496
        • C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
          "C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2964
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 2964 -s 568
            5⤵
            • Program crash
            PID:3580
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2964 -ip 2964
    1⤵
      PID:4360

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\32a17bb1-8f22-430d-8bcc-e4ec3958227a\5c171af1b9174fd62c8a9e3f2de9df00N.exe

      Filesize

      888KB

      MD5

      5c171af1b9174fd62c8a9e3f2de9df00

      SHA1

      88586368c833ce427e3e28af0a7bd5a18b0add4c

      SHA256

      856fed29facb17f62dd6449b1cfabe65de2b8cb478e52417e7c0069bde7db864

      SHA512

      5675000af023d8c2f1c4c9091f4356178ec2c8975f66ad259483ea02c9bf458280449143d64ad13ec2b65f81380da80eb7a835546752fbbfa1c917f5553f4af1

    • memory/1328-4-0x0000000000400000-0x0000000000537000-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/1328-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1328-17-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2376-1-0x0000000000770000-0x0000000000803000-memory.dmp

      Filesize

      588KB

    • memory/2376-2-0x0000000002270000-0x000000000238B000-memory.dmp

      Filesize

      1.1MB

    • memory/2496-22-0x0000000000400000-0x00000000004DE000-memory.dmp

      Filesize

      888KB

    • memory/2496-20-0x0000000000400000-0x00000000004DE000-memory.dmp

      Filesize

      888KB

    • memory/2964-21-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2964-25-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2964-23-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB