Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/10/2024, 18:38

General

  • Target
    d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe
  • Size 806KB
  • Sample241014-w9769atfpr
  • SHA256 d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://cajgtus.com/test2/get.php

Attributes
  • extension

    .waqa

  • offline_id

    Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1

  • payload_url

    http://defgyma.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/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: 0875PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 4 IoCs
  • 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 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 53 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe
    "C:\Users\Admin\AppData\Local\Temp\d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2124
    • C:\Users\Admin\AppData\Local\Temp\d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe
      "C:\Users\Admin\AppData\Local\Temp\d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.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:540
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\6e6ff895-2201-465b-9bab-52ed267117a6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:4632
      • C:\Users\Admin\AppData\Local\Temp\d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe
        "C:\Users\Admin\AppData\Local\Temp\d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1648
        • C:\Users\Admin\AppData\Local\Temp\d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe
          "C:\Users\Admin\AppData\Local\Temp\d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4760
          • C:\Users\Admin\AppData\Local\2d6cfafe-6fa5-4dd3-b7ab-9bdeebbc736d\build3.exe
            "C:\Users\Admin\AppData\Local\2d6cfafe-6fa5-4dd3-b7ab-9bdeebbc736d\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:368
            • C:\Users\Admin\AppData\Local\2d6cfafe-6fa5-4dd3-b7ab-9bdeebbc736d\build3.exe
              "C:\Users\Admin\AppData\Local\2d6cfafe-6fa5-4dd3-b7ab-9bdeebbc736d\build3.exe"
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:3784
              • C:\Windows\SysWOW64\schtasks.exe
                /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                7⤵
                • System Location Discovery: System Language Discovery
                • Scheduled Task/Job: Scheduled Task
                PID:2404
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1600
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4408
      • C:\Windows\SysWOW64\schtasks.exe
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3692

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        8B2B9A00839EED1DFDCCC3BFC2F5DF12

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
        • Size 1KB
        • SHA256 facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb
        • MD5 SHA1 SHA512

        B46811C17859FFB409CF0E904A4AA8F8

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
        • Size 436B
        • SHA256 f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
        • MD5 SHA1 SHA512

        8B2B9A00839EED1DFDCCC3BFC2F5DF12

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
        • Size 174B
        • SHA256 a51b341c49dbde23a0713d6662b2456d7af5113fc70071154fe5466eae342be0
        • MD5 SHA1 SHA512

        B46811C17859FFB409CF0E904A4AA8F8

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
        • Size 170B
        • SHA256 1c83b52eec0016d837569fd2a9bb313a5daaad4da8b0746c50eb5778a8ea342d
        • MD5 SHA1 SHA512

        build3.exe

        • Path C:\Users\Admin\AppData\Local\2d6cfafe-6fa5-4dd3-b7ab-9bdeebbc736d\build3.exe
        • Size 299KB
        • SHA256 fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
        • MD5 SHA1 SHA512 SSDEEP

        d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe

        • Path C:\Users\Admin\AppData\Local\6e6ff895-2201-465b-9bab-52ed267117a6\d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee.exe
        • Size 806KB
        • SHA256 d47e05b0ad27c651fb9cf73444e1f6a26514acb16998e92fca8be115ae6a2dee
        • MD5 SHA1 SHA512 SSDEEP

        memory/540-19-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/540-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/540-3-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/540-4-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/540-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2124-1-0x0000000004190000-0x0000000004228000-memory.dmp

        memory/2124-2-0x0000000004250000-0x000000000436B000-memory.dmp

        memory/3784-62-0x0000000000410000-0x00000000004D9000-memory.dmp

        memory/3784-63-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3784-60-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3784-58-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/4760-34-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4760-37-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4760-49-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4760-53-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4760-36-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4760-30-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4760-29-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4760-22-0x0000000000400000-0x0000000000537000-memory.dmp