Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/07/2024, 05:56

General

  • Target
    c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe
  • Size 808KB
  • Sample240725-gnaarsscmp
  • SHA256 c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://winnlinne.com/test3/get.php

Attributes
  • extension

    .ofoq

  • offline_id

    xkNzhkB1wvgoDI7Uo0HPNLY3qCuwoFpP7nlhlut1

  • payload_url

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

    http://winnlinne.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-EWKSsSJiVn 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: 0568Jhyjd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 16 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Checks computer location settings 2 TTPs 3 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 3 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe
    "C:\Users\Admin\AppData\Local\Temp\c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1056
    • C:\Users\Admin\AppData\Local\Temp\THvFY.exe
      C:\Users\Admin\AppData\Local\Temp\THvFY.exe
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3564
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\20bb152b.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2932
    • C:\Users\Admin\AppData\Local\Temp\c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe
      "C:\Users\Admin\AppData\Local\Temp\c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.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:4844
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\1fe73f5b-831c-4f91-ad5b-7af4baff5055" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:3232
      • C:\Users\Admin\AppData\Local\Temp\c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe
        "C:\Users\Admin\AppData\Local\Temp\c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4452
        • C:\Users\Admin\AppData\Local\Temp\THvFY.exe
          C:\Users\Admin\AppData\Local\Temp\THvFY.exe
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4764
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\57826fa3.bat" "
            5⤵
            • System Location Discovery: System Language Discovery
            PID:3516
        • C:\Users\Admin\AppData\Local\Temp\c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe
          "C:\Users\Admin\AppData\Local\Temp\c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:1804

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 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
        • MD5 SHA1 SHA512

        B46811C17859FFB409CF0E904A4AA8F8

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
        • Size 436B
        • SHA256 5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f
        • MD5 SHA1 SHA512

        8B2B9A00839EED1DFDCCC3BFC2F5DF12

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
        • Size 174B
        • SHA256 20222d35d486f9f5d0ca3d1754f62df9ffe7240fed02a1aebc0d0c74e67c9fc8
        • MD5 SHA1 SHA512

        B46811C17859FFB409CF0E904A4AA8F8

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
        • Size 170B
        • SHA256 232a3b18a52cd7be767ad9c398dfb76ac2a2f8dfc7e69dae6cc4064b91d9e5d8
        • MD5 SHA1 SHA512

        c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe

        • Path C:\Users\Admin\AppData\Local\1fe73f5b-831c-4f91-ad5b-7af4baff5055\c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e.exe
        • Size 808KB
        • SHA256 c82021909b9fa18ba7151f0df381ba5d605e4729b0d75d27ab7dab2b906ebe4e
        • MD5 SHA1 SHA512 SSDEEP

        k2[1].rar

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\A4F1OTIC\k2[1].rar
        • Size 4B
        • SHA256 b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c
        • MD5 SHA1 SHA512

        00D36BBC.exe

        • Path C:\Users\Admin\AppData\Local\Temp\00D36BBC.exe
        • Size 4B
        • SHA256 9f2981a7cc4d40a2a409dc895de64253acd819d7c0011c8e80b86fe899464e31
        • MD5 SHA1 SHA512

        20bb152b.bat

        • Path C:\Users\Admin\AppData\Local\Temp\20bb152b.bat
        • Size 185B
        • SHA256 46e85a174d4ccb81fbc87844b08cb4d183678df83e3f9c94312dc0b85cb58786
        • MD5 SHA1 SHA512

        57826fa3.bat

        • Path C:\Users\Admin\AppData\Local\Temp\57826fa3.bat
        • Size 185B
        • SHA256 42aacf83a9e760c978e5936ca7be98e3c41b987b90587ec402b408d4a290768c
        • MD5 SHA1 SHA512

        THvFY.exe

        • Path C:\Users\Admin\AppData\Local\Temp\THvFY.exe
        • Size 15KB
        • SHA256 4485df22c627fa0bb899d79aa6ff29bc5be1dbc3caa2b7a490809338d54b7794
        • MD5 SHA1 SHA512 SSDEEP

        memory/1056-50-0x00000000021E0000-0x00000000022FB000-memory.dmp

        memory/1056-0-0x0000000000400000-0x000000000050C000-memory.dmp

        memory/1056-53-0x0000000000400000-0x000000000050C000-memory.dmp

        memory/1056-49-0x0000000000790000-0x0000000000829000-memory.dmp

        memory/1804-88-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1804-89-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1804-98-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1804-97-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1804-95-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1804-96-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1804-82-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1804-81-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1804-93-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1804-90-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3564-47-0x00000000002E0000-0x00000000002E9000-memory.dmp

        memory/3564-6-0x00000000002E0000-0x00000000002E9000-memory.dmp

        memory/4452-83-0x0000000000400000-0x000000000050C000-memory.dmp

        memory/4452-70-0x0000000000400000-0x000000000050C000-memory.dmp

        memory/4764-74-0x0000000000AD0000-0x0000000000AD9000-memory.dmp

        memory/4844-54-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4844-55-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4844-52-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4844-66-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4844-51-0x0000000000400000-0x0000000000537000-memory.dmp