Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    09/08/2026, 12:36

General

  • Target
    a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
  • Size 702KB
  • Sample260809-ps33msxglc
  • SHA256 a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • djvu

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

Attributes
  • extension

    .bgzq

  • offline_id

    Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1

  • payload_url

    http://sdfjhuz.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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0864PsawqS

rsa_pubkey.plain

Signatures

  • Family: Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Detected Djvu ransomware 14 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 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 1 TTPs 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
    "C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
      "C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.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:2740
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\1eb51e4f-1b8f-4396-ba62-8a926dd71514" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:2856
      • C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
        "C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2532
        • C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
          "C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:2160
  • C:\Users\Admin\AppData\Local\1eb51e4f-1b8f-4396-ba62-8a926dd71514\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
    C:\Users\Admin\AppData\Local\1eb51e4f-1b8f-4396-ba62-8a926dd71514\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2480
    • C:\Users\Admin\AppData\Local\1eb51e4f-1b8f-4396-ba62-8a926dd71514\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
      C:\Users\Admin\AppData\Local\1eb51e4f-1b8f-4396-ba62-8a926dd71514\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:1212

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        70825F0EABF2526E540CA0F7C268D189

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\70825F0EABF2526E540CA0F7C268D189
        • Size 309B
        • SHA256 091bbd1acaff352686d345b5d1a62cbe1907c8993036afffba6ac4b6121c1772
        • MD5 SHA1 SHA512 TLSH

        8B2B9A00839EED1DFDCCC3BFC2F5DF12

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
        • Size 1KB
        • SHA256 63b14543360f5e89942ea8d5113526e64fbc71c1207328f0136b3a495d921dd0
        • MD5 SHA1 SHA512 TLSH

        B46811C17859FFB409CF0E904A4AA8F8

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
        • Size 528B
        • SHA256 d2bb091268ade68ad8121d2184d0fbce128070156304bd4de312e6fbd267409c
        • MD5 SHA1 SHA512 TLSH

        70825F0EABF2526E540CA0F7C268D189

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\70825F0EABF2526E540CA0F7C268D189
        • Size 192B
        • SHA256 053973f5918035dfe3aa06ea1534058bba82e3097e18435a6489ed6741bae2fa
        • MD5 SHA1 SHA512 TLSH

        8B2B9A00839EED1DFDCCC3BFC2F5DF12

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
        • Size 174B
        • SHA256 35bafbf6617033016dc0edfe7991f76d91e2eba29bdbcc48e09b4f3a1a57049b
        • MD5 SHA1 SHA512 TLSH

        B46811C17859FFB409CF0E904A4AA8F8

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
        • Size 170B
        • SHA256 e120fb44f6da27b8f1e3f35511650f190294c531dbeb82503741b7833a2753dd
        • MD5 SHA1 SHA512 TLSH

        a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe

        • Path C:\Users\Admin\AppData\Local\1eb51e4f-1b8f-4396-ba62-8a926dd71514\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
        • Size 702KB
        • SHA256 a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/1212-34-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1212-43-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2020-2-0x00000000049C0000-0x0000000004ADB000-memory.dmp

        memory/2020-1-0x0000000002CE0000-0x0000000002D7C000-memory.dmp

        memory/2160-22-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2160-36-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2160-35-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2160-20-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2160-45-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2740-15-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2740-7-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2740-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2740-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2740-4-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2740-3-0x0000000000400000-0x0000000000537000-memory.dmp