Analysis

  • max time kernel
    297s
  • max time network
    252s
  • platform
    windows10-1703_x64
  • resource
    win10-20231025-en
  • resource tags

    arch:x64arch:x86image:win10-20231025-enlocale:en-usos:windows10-1703-x64system
  • submitted
    27-11-2023 04:52

General

  • Target

    509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe

  • Size

    785KB

  • MD5

    ed61f850998129a23067242a868a2044

  • SHA1

    f5873bdd503ab43cc7c1bf7bfb9294a36bc8b74a

  • SHA256

    509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1

  • SHA512

    ee3094216838491481fc42cac3bfa518733f95e4765a7348cb43e449d74b7f58818f6fe41a4661907ae0648ef0a219a069231808a0bda6173f7677aeba7e7a41

  • SSDEEP

    12288:TPSJR2xS142p8hcMdkjTDcmLbJnGOXIBHHis5JZ1vJwmrShMvDZ0:KR2mTp8nocUtwnis5WwDZ0

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/lancer/get.php

Attributes
  • extension

    .gycc

  • offline_id

    nN1rRlTxKTPo66pmJEAHwufZ2Dhz4MsNxIlOk6t1

  • payload_url

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

    http://zexeq.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-CDZ4hMgp2X 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: 0829ASdw

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe
    "C:\Users\Admin\AppData\Local\Temp\509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:5060
    • C:\Users\Admin\AppData\Local\Temp\509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe
      "C:\Users\Admin\AppData\Local\Temp\509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:220
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\288a16b3-1f3c-48ec-80ff-3a35ec7a4ec6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2320
      • C:\Users\Admin\AppData\Local\Temp\509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe
        "C:\Users\Admin\AppData\Local\Temp\509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1312
        • C:\Users\Admin\AppData\Local\Temp\509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe
          "C:\Users\Admin\AppData\Local\Temp\509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4536
          • C:\Users\Admin\AppData\Local\7909978e-ea0c-419b-8cd0-e8edd09ea696\build2.exe
            "C:\Users\Admin\AppData\Local\7909978e-ea0c-419b-8cd0-e8edd09ea696\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4480
            • C:\Users\Admin\AppData\Local\7909978e-ea0c-419b-8cd0-e8edd09ea696\build2.exe
              "C:\Users\Admin\AppData\Local\7909978e-ea0c-419b-8cd0-e8edd09ea696\build2.exe"
              6⤵
              • Executes dropped EXE
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:4080
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\7909978e-ea0c-419b-8cd0-e8edd09ea696\build2.exe" & del "C:\ProgramData\*.dll"" & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:4664
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 5
                  8⤵
                  • Delays execution with timeout.exe
                  PID:4492

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

    Filesize

    1KB

    MD5

    8584329156d082b3be8cae7ce02baef4

    SHA1

    c7442e94ba342d35f13f3afba516efae7e1e749d

    SHA256

    b4e30b71b318a78c4055f1cae108e0c51dc945de02efbf80703d048eb1035806

    SHA512

    6607a44d7e3e36edacc113cd56d1a95f969b27f079303ede89d3f77f5ca071f90a586f7c3731b6bebabb25de9d31dbaaadb5139ce265bda6e2b9dcf8ed2ae089

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

    Filesize

    724B

    MD5

    8202a1cd02e7d69597995cabbe881a12

    SHA1

    8858d9d934b7aa9330ee73de6c476acf19929ff6

    SHA256

    58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

    SHA512

    97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

    Filesize

    410B

    MD5

    02b3dc741e8d97226dd46264d8766766

    SHA1

    16af17204484ccf057da0f5af1af9996b2a6d960

    SHA256

    e7a5b5e20dd5ec9aec54e49c77c6873b71ee02ba026a1d6299069fe57b8a2115

    SHA512

    600932a1180aff42291c3616012867b63f27c655556b889b1bfefbd32581f0264d622c08c6c25062878bd3b892a3db345ccf07c54794544b0487da39ad40220c

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

    Filesize

    392B

    MD5

    b832931ca84cdd0277c6f942b78e91da

    SHA1

    6790949b52529834b1e1c1148f96ed2e9d6b07ad

    SHA256

    1ed23a29e604220c3401b5ded1d25cc29934fcb3a82cce6ed4a946df0341e20e

    SHA512

    cfd8ae80a4bf3416cdcaf452f9d6afd278aa5871b47aa26646ee95bb241edaf0773ac655c44bf7fe7f3551ce9bd2e8dc431b08d008f76f4bc936fd69d9cfa090

  • C:\Users\Admin\AppData\Local\288a16b3-1f3c-48ec-80ff-3a35ec7a4ec6\509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1.exe

    Filesize

    785KB

    MD5

    ed61f850998129a23067242a868a2044

    SHA1

    f5873bdd503ab43cc7c1bf7bfb9294a36bc8b74a

    SHA256

    509466341efb97d03c3ffc43b6e6570941da23566b1d1101fbde8a836047a7b1

    SHA512

    ee3094216838491481fc42cac3bfa518733f95e4765a7348cb43e449d74b7f58818f6fe41a4661907ae0648ef0a219a069231808a0bda6173f7677aeba7e7a41

  • C:\Users\Admin\AppData\Local\7909978e-ea0c-419b-8cd0-e8edd09ea696\build2.exe

    Filesize

    222KB

    MD5

    cb3caf60d63416b453f082de56510f98

    SHA1

    b06d9d1fd647e7e176d8b88c23be1b59f23ca26e

    SHA256

    d883478d7646dd5f53a6ce22e76b432cf1023fb456d2fe8c90176b96754db9e9

    SHA512

    1cb17bd4b917fdfcd322438c54df7bad6dc82756558fc39e531083ee02977c107de00ce0bce2553962cf2ad6a2f6d5181d5f235cda4457149539f0aa52c361e7

  • C:\Users\Admin\AppData\Local\7909978e-ea0c-419b-8cd0-e8edd09ea696\build2.exe

    Filesize

    222KB

    MD5

    cb3caf60d63416b453f082de56510f98

    SHA1

    b06d9d1fd647e7e176d8b88c23be1b59f23ca26e

    SHA256

    d883478d7646dd5f53a6ce22e76b432cf1023fb456d2fe8c90176b96754db9e9

    SHA512

    1cb17bd4b917fdfcd322438c54df7bad6dc82756558fc39e531083ee02977c107de00ce0bce2553962cf2ad6a2f6d5181d5f235cda4457149539f0aa52c361e7

  • C:\Users\Admin\AppData\Local\7909978e-ea0c-419b-8cd0-e8edd09ea696\build2.exe

    Filesize

    222KB

    MD5

    cb3caf60d63416b453f082de56510f98

    SHA1

    b06d9d1fd647e7e176d8b88c23be1b59f23ca26e

    SHA256

    d883478d7646dd5f53a6ce22e76b432cf1023fb456d2fe8c90176b96754db9e9

    SHA512

    1cb17bd4b917fdfcd322438c54df7bad6dc82756558fc39e531083ee02977c107de00ce0bce2553962cf2ad6a2f6d5181d5f235cda4457149539f0aa52c361e7

  • C:\Users\Admin\AppData\Local\7909978e-ea0c-419b-8cd0-e8edd09ea696\build3.exe

    Filesize

    1KB

    MD5

    cc6901a2665a3928d7547895d62e1bfd

    SHA1

    552303030ba53828fe3cdf725c44e84494f16de5

    SHA256

    1ef93ea88586bd708e6f8fe05622a4d7d481c327a822d9cc795ee6f4f31636d8

    SHA512

    9646389573b831dcdc65cdf83fdb9d7d715140050d55928dfaf3f31e23e2186bdef133c5a009039b80feb36e37d260823409636b5aeeea271dda30ab0e74539f

  • memory/220-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/220-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/220-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/220-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/220-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1312-21-0x0000000000A00000-0x0000000000A9E000-memory.dmp

    Filesize

    632KB

  • memory/4080-77-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/4080-60-0x0000000000400000-0x000000000063A000-memory.dmp

    Filesize

    2.2MB

  • memory/4080-59-0x0000000000400000-0x000000000063A000-memory.dmp

    Filesize

    2.2MB

  • memory/4080-95-0x0000000000400000-0x000000000063A000-memory.dmp

    Filesize

    2.2MB

  • memory/4080-55-0x0000000000400000-0x000000000063A000-memory.dmp

    Filesize

    2.2MB

  • memory/4080-74-0x0000000000400000-0x000000000063A000-memory.dmp

    Filesize

    2.2MB

  • memory/4080-75-0x0000000000400000-0x000000000063A000-memory.dmp

    Filesize

    2.2MB

  • memory/4480-56-0x0000000002410000-0x0000000002438000-memory.dmp

    Filesize

    160KB

  • memory/4480-54-0x00000000008C0000-0x00000000009C0000-memory.dmp

    Filesize

    1024KB

  • memory/4536-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4536-52-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4536-45-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4536-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4536-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4536-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4536-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4536-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4536-24-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4536-23-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5060-1-0x0000000002510000-0x00000000025AD000-memory.dmp

    Filesize

    628KB

  • memory/5060-2-0x00000000025B0000-0x00000000026CB000-memory.dmp

    Filesize

    1.1MB