Analysis

  • max time kernel
    145s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/01/2024, 08:50

General

  • Target

    5ca3f45557b4e9c5b9c2ace9ae1a4752.exe

  • Size

    729KB

  • MD5

    5ca3f45557b4e9c5b9c2ace9ae1a4752

  • SHA1

    8497aae4a8f26c94bdbd9478db8fd0a5479e81d2

  • SHA256

    66d68d69e8d3911c571276d89698732c17f35544c5884d548c9260adf01b9839

  • SHA512

    723171a94fdbbdb3f921ad8d6e63782b8fcebe3db88e1e6557c8ab2c8e897a90c6a673b32a64c2a32f81b472ff32483a7ac64e40c63f940c784cb423bac6b563

  • SSDEEP

    12288:dMUbKO9Y0irApn/w9tiKFJWP3vxSBh3XzwphP+2FTbvIjK8xf2U:mUFirA4n7aP3e3222FTrIjK8

Malware Config

Extracted

Family

djvu

C2

http://astdg.top/fhsgtsspen6/get.php

Attributes
  • extension

    .nooa

  • offline_id

    PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1

  • payload_url

    http://securebiz.org/dl/build2.exe

    http://astdg.top/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. You can get and look video overview decrypt tool: https://we.tl/t-CnI3tI6Ktv Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0322gDrgo

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 18 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\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
    "C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1332
    • C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
      "C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4092
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\05eca6e0-e5ff-48c0-8c05-37cbb624f885" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2392
      • C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
        "C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4180
        • C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
          "C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:860

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

          b7470a9aa569b259d4c2bb3b80ae3aa3

          SHA1

          093290296b7f1e402ef96e4b33a88f064aa401eb

          SHA256

          ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6

          SHA512

          4da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be

        • 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

          a6b9bf291eb2fba6054942b19caf34a6

          SHA1

          8907687ca7d66c8518f50df2695de5966f60e69d

          SHA256

          d3ac5e897b373c3b74cefeb7f0c7f4798a472a53883fe073443db3630f7777a9

          SHA512

          1043772a0cac5ed2fc382abe373a2d667a86974cd082319cf486608f064ee643c53e9349bbacc49d759932ba84c08644dd82f9468962533426a18cfee9e92247

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

          Filesize

          392B

          MD5

          adffb09b28da4972e42784a110a7d109

          SHA1

          a6b5a1803e6cd823be0f5509d2993bbcc2fa012d

          SHA256

          d938dec63ace855025e8dbaf47b661e413d6a588d76df4333519c0b303b17187

          SHA512

          a7a132778bb9b404e44b9dee686c49ba35cf775bff18ee58bbe2d993442feb62b5c03370a75bf8f42334942787ae3124c4a8693da8bab0817d6846379b5408c7

        • C:\Users\Admin\AppData\Local\05eca6e0-e5ff-48c0-8c05-37cbb624f885\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe

          Filesize

          729KB

          MD5

          5ca3f45557b4e9c5b9c2ace9ae1a4752

          SHA1

          8497aae4a8f26c94bdbd9478db8fd0a5479e81d2

          SHA256

          66d68d69e8d3911c571276d89698732c17f35544c5884d548c9260adf01b9839

          SHA512

          723171a94fdbbdb3f921ad8d6e63782b8fcebe3db88e1e6557c8ab2c8e897a90c6a673b32a64c2a32f81b472ff32483a7ac64e40c63f940c784cb423bac6b563

        • memory/860-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-20-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-33-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/860-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1332-2-0x0000000004A10000-0x0000000004B2B000-memory.dmp

          Filesize

          1.1MB

        • memory/1332-1-0x0000000002FA0000-0x0000000003042000-memory.dmp

          Filesize

          648KB

        • memory/4092-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4092-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4092-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4092-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4092-16-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4180-18-0x00000000048F0000-0x0000000004991000-memory.dmp

          Filesize

          644KB