Analysis

  • max time kernel
    308s
  • max time network
    299s
  • platform
    windows10-1703_x64
  • resource
    win10-20231215-en
  • resource tags

    arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system
  • submitted
    28/01/2024, 22:17

General

  • Target
    15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe
  • Size 665KB
  • Sample240128-17v65abce8
  • SHA256 15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://habrafa.com/test1/get.php

Attributes
  • extension

    .cdcc

  • offline_id

    LBxKKiegnAy53rpqH3Pj2j46vwldiEt9kqHSuMt1

  • 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-iVcrVFVRqu 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: 0846ASdw

rsa_pubkey.plain

Extracted

Family
  • vidar

Version
  • 7.5

Botnet
  • e7447dc405edc4690f5920bdb056364f

C2
  • https://t.me/bogotatg

  • https://steamcommunity.com/profiles/76561199621829149

Attributes
  • profile_id_v2

    e7447dc405edc4690f5920bdb056364f

  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 11_3) Chrome/90.0.4430.93 Safari/537.36 Vivaldi/3.7

Signatures

  • Detect Vidar Stealer 8 IoCs
  • Detected Djvu ransomware 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 11 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 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 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 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe
    "C:\Users\Admin\AppData\Local\Temp\15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1808
    • C:\Users\Admin\AppData\Local\Temp\15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe
      "C:\Users\Admin\AppData\Local\Temp\15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5004
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\799ded73-55b5-436f-bca4-c32c1b675987" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3132
      • C:\Users\Admin\AppData\Local\Temp\15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe
        "C:\Users\Admin\AppData\Local\Temp\15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1796
        • C:\Users\Admin\AppData\Local\Temp\15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe
          "C:\Users\Admin\AppData\Local\Temp\15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3108
          • C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build2.exe
            "C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3980
            • C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build2.exe
              "C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:4484
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4484 -s 1856
                7⤵
                • Program crash
                PID:4460
          • C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build3.exe
            "C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4500
            • C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build3.exe
              "C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3600
  • 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"
    1⤵
    • Creates scheduled task(s)
    PID:4272
  • 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
    • Suspicious use of WriteProcessMemory
    PID:4188
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4820
      • 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⤵
        • Creates scheduled task(s)
        PID:4808
  • 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
    PID:1868
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1048
  • 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
    PID:4220
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:4256
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    PID:4648

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 1KB
        • SHA256 972331bf876251e477d6232910b63cc2901ea9a039f03161b07bd4851d1452ab
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 724B
        • SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
        • MD5 SHA1 SHA512

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 410B
        • SHA256 efd12497ca478f327ddb18d79b1d83214d607d38a5c9f65337bc4bbc90db4386
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 392B
        • SHA256 66bc22faef9d600c8d46ac6bd3a4855c29b4b4536de9b9d1a576e35326fbf379
        • MD5 SHA1 SHA512

        build2.exe

        • Path C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build2.exe
        • Size 262KB
        • SHA256 1ae4509fb8949fab80d4cc0fefec087af17e7c5654f2a66ac04f7372edaec5fe
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build3.exe
        • Size 299KB
        • SHA256 fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\75b60816-f483-4521-84d3-ec22b5a4e7a1\build3.exe
        • Size 267KB
        • SHA256 25c78f7ad93882ccb2091b87343c3d37819a4649adf0667c84c1befa2b94986a
        • MD5 SHA1 SHA512 SSDEEP

        15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe

        • Path C:\Users\Admin\AppData\Local\799ded73-55b5-436f-bca4-c32c1b675987\15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a.exe
        • Size 665KB
        • SHA256 15678912e8711440cd89fed63ef9d25ce4432d44fc5396b046a8c56c29fd507a
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 62KB
        • SHA256 d7ffba3ea741d3933f70f0ba14e157d51bd634d621bbe81da34ba1f2e8e831a9
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 187KB
        • SHA256 f21915a70a7dc2940e40dcd45c0f5743058cf61a203e3fdff9626d13debe49dd
        • MD5 SHA1 SHA512 SSDEEP

        memory/1796-21-0x0000000002C90000-0x0000000002D31000-memory.dmp

        memory/1808-1-0x0000000002DD0000-0x0000000002E6D000-memory.dmp

        memory/1808-3-0x0000000004850000-0x000000000496B000-memory.dmp

        memory/1868-132-0x0000000000960000-0x0000000000A60000-memory.dmp

        memory/3108-37-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3108-53-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3108-30-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3108-29-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3108-34-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3108-36-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3108-63-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3108-24-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3108-23-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3108-22-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3600-74-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3600-81-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3600-79-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3980-47-0x0000000000760000-0x0000000000860000-memory.dmp

        memory/3980-48-0x00000000005A0000-0x00000000005CC000-memory.dmp

        memory/4188-111-0x0000000000B20000-0x0000000000C20000-memory.dmp

        memory/4220-159-0x00000000009C0000-0x0000000000AC0000-memory.dmp

        memory/4484-66-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4484-46-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4484-52-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4484-51-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4500-78-0x00000000001E0000-0x00000000001E4000-memory.dmp

        memory/4500-77-0x0000000000910000-0x0000000000A10000-memory.dmp

        memory/5004-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5004-17-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5004-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5004-4-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5004-2-0x0000000000400000-0x0000000000537000-memory.dmp