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Analysis

  • max time kernel
    94s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/12/2024, 03:13

General

  • Target

    b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe

  • Size

    761KB

  • MD5

    d829a46501729b196b794f955aa69cc0

  • SHA1

    20efd5be2d09c31001c7b107388a9aee76f41eea

  • SHA256

    b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41

  • SHA512

    1497087e6fc04c23043da0974db4cd98c4c77a1509f648b2e230f0a8f5727fae3c8dd463fb1d9cc1e7094fb9692c35630999f7c14c4c28b837dc6dd72e75d9ec

  • SSDEEP

    12288:WvbhHdeD79q7DmMHUvJqHv/bpxwW4nnpdT0LHdVdjl8/e+7krnhOQUc4Mng/KWDi:E7eVSeJqPjQXnoLHdVdm/37kMQb4pKUi

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/test1/get.php

Attributes
  • extension

    .ghas

  • offline_id

    miqhSGmGE63yWs53FTz0fnp8eCARpnaYE3O3p2t1

  • payload_url

    http://zerit.top/dl/build2.exe

    http://fuyt.org/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-0SLhZxAjRX 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: 0445JIjdm

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 9 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Djvu 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\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
    "C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3088
    • C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
      "C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.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:4280
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\5a060378-0a5d-44d6-b3ea-e5faaae13326" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:4920
      • C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
        "C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5072
        • C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
          "C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          PID:1660
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1660 -s 584
            5⤵
            • Program crash
            PID:4860
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1660 -ip 1660
    1⤵
      PID:1712

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\5a060378-0a5d-44d6-b3ea-e5faaae13326\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe

      Filesize

      761KB

      MD5

      d829a46501729b196b794f955aa69cc0

      SHA1

      20efd5be2d09c31001c7b107388a9aee76f41eea

      SHA256

      b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41

      SHA512

      1497087e6fc04c23043da0974db4cd98c4c77a1509f648b2e230f0a8f5727fae3c8dd463fb1d9cc1e7094fb9692c35630999f7c14c4c28b837dc6dd72e75d9ec

    • memory/1660-21-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1660-22-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1660-24-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3088-2-0x0000000002220000-0x000000000233B000-memory.dmp

      Filesize

      1.1MB

    • memory/3088-1-0x0000000000770000-0x0000000000809000-memory.dmp

      Filesize

      612KB

    • memory/4280-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4280-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4280-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4280-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4280-17-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/5072-19-0x0000000000400000-0x00000000004E6000-memory.dmp

      Filesize

      920KB

    • memory/5072-25-0x0000000000400000-0x00000000004E6000-memory.dmp

      Filesize

      920KB