Analysis

  • max time kernel
    79s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2024, 05:32

General

  • Target

    16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe

  • Size

    744KB

  • MD5

    a29a054b916c7fb3a6b10e18c54cb9ec

  • SHA1

    bf756199ed02aa04bbfacad49ea51333f6a3a999

  • SHA256

    16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34

  • SHA512

    78b3d4425acc21dbf40e9df6015db6bb9a3729506845e6be3e025027fc6142469b3b353a543c85730ccddb136ef93e85fc9209dc03af3ac667b0006c49c6b43d

  • SSDEEP

    12288:tBWA0WS1K08QHydsNMhhgQnKT310AmvToMJyng+q4hvhyHOaeVoajKZTlReJEKfc:c8XQSdI25KT1+LQnVqUAHOaeVQlgXf

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .cdpo

  • offline_id

    Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://habrafa.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. You can get and look video overview decrypt tool: https://we.tl/t-FCWSCsjEWS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0844OSkw

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
    "C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2396
    • C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
      "C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3752
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\07e127b3-8619-4db8-af6c-2b4fee2a52ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:660
      • C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
        "C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1476
        • C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
          "C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
            PID:4072
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4072 -s 568
              5⤵
              • Program crash
              PID:4736
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4072 -ip 4072
      1⤵
        PID:3544

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\07e127b3-8619-4db8-af6c-2b4fee2a52ff\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe

              Filesize

              744KB

              MD5

              a29a054b916c7fb3a6b10e18c54cb9ec

              SHA1

              bf756199ed02aa04bbfacad49ea51333f6a3a999

              SHA256

              16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34

              SHA512

              78b3d4425acc21dbf40e9df6015db6bb9a3729506845e6be3e025027fc6142469b3b353a543c85730ccddb136ef93e85fc9209dc03af3ac667b0006c49c6b43d

            • memory/1476-18-0x0000000000780000-0x000000000081F000-memory.dmp

              Filesize

              636KB

            • memory/2396-1-0x0000000002270000-0x000000000230A000-memory.dmp

              Filesize

              616KB

            • memory/2396-2-0x0000000002340000-0x000000000245B000-memory.dmp

              Filesize

              1.1MB

            • memory/3752-3-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/3752-4-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/3752-5-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/3752-6-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/3752-15-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/4072-20-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/4072-21-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/4072-23-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB