Analysis

  • max time kernel
    297s
  • max time network
    304s
  • platform
    windows10-1703_x64
  • resource
    win10-20231215-en
  • resource tags

    arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system
  • submitted
    15/01/2024, 04:55

General

  • Target

    a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe

  • Size

    735KB

  • MD5

    3c2b31e7c091650e12934ee8eeaeeb58

  • SHA1

    5848274e0b6da2d94d28b32314a5b9b56d2d7a5e

  • SHA256

    a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a

  • SHA512

    fde24a46c657248611e27feb5835eb76e12ba828028b1ba514ff98cf5046f122d68e179923f6c52edec0c97edc578f7a6e0671eda12799ce4351f934db0d6100

  • SSDEEP

    12288:89z7w/ixbv7lzUwXOwuG6rVAPJChCEzIa5vMFiZL1jb1yP0t5BwEYNi7/S:89z7wibTxUwXOw6WIDzXyiZW09fei7

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .cdpo

  • offline_id

    Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1

  • 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-FCWSCsjEWS 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: 0844OSkw

rsa_pubkey.plain

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 16 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 14 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 9 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\a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe
    "C:\Users\Admin\AppData\Local\Temp\a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3784
    • C:\Users\Admin\AppData\Local\Temp\a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe
      "C:\Users\Admin\AppData\Local\Temp\a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2544
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\ff4b3cd0-a953-4de5-bc46-5112cba09b7e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1820
      • C:\Users\Admin\AppData\Local\Temp\a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe
        "C:\Users\Admin\AppData\Local\Temp\a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2980
        • C:\Users\Admin\AppData\Local\Temp\a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe
          "C:\Users\Admin\AppData\Local\Temp\a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3320
          • C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build2.exe
            "C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1444
            • C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build2.exe
              "C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:4268
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4268 -s 1928
                7⤵
                • Program crash
                PID:1056
          • C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build3.exe
            "C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3680
            • C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build3.exe
              "C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:864
              • 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⤵
                • Creates scheduled task(s)
                PID:4780
  • 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:3248
    • 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:4264
      • 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:4756
  • 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:5068
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:436
  • 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:5040
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2104
  • 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:688
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2860
  • 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:1492
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2508

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

          b7470a9aa569b259d4c2bb3b80ae3aa3

          SHA1

          093290296b7f1e402ef96e4b33a88f064aa401eb

          SHA256

          ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6

          SHA512

          4da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be

        • 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

          cdd2a66680e57ed3177202af8e0e3e76

          SHA1

          5f8cb7912c9122161fd49eb608a5722f37e0f0da

          SHA256

          d641ee5febeac49f522fb93abcf5e7fd0cbdd543f984cf27545ccac395135337

          SHA512

          55eaa6335b0ea858b3207e5197f340ab74b69596e1aaf8101c98dbd201d7ccd8823ebbb62ab92d420cee3bd120192f8ab9923c4c9e31b948f8a3e6cf22ed5c17

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

          Filesize

          392B

          MD5

          57313eb3ffa096f23faa8ee3cafae685

          SHA1

          6de8364f5146921d7f2faa22a5c4927bf93d7634

          SHA256

          4de57d50cf948cd713380aab3a43b0e57c8c8313d891b60082c08f9cb2214abf

          SHA512

          97aaeab67fa1640a635e3af6900ef8f531bde377195fd76955c0fef6cf6d7ac1abebbeb881307cb20fa882941f414dacad5be945496a9b4f6b962f69f4bd0a65

        • C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build2.exe

          Filesize

          358KB

          MD5

          c4070da9f9b0581171af16e681ccdff8

          SHA1

          3fb4182921fdc3acd7873ebe113ac5522585312a

          SHA256

          26063c78e5418610471a9f3a00a155d7d1e5b29856e1979ba3bdc42681a871d0

          SHA512

          c7569cea7f1a841e7cac9cd41287dba3bcacf2cf9dee7bece88800848a7ad5dc4cd2bdc896c7389f0f1144079bbe168048b3f722bcd76fa5d6e14f3081bb6427

        • C:\Users\Admin\AppData\Local\092bdef0-490c-4c03-a841-2a658414b65f\build3.exe

          Filesize

          299KB

          MD5

          41b883a061c95e9b9cb17d4ca50de770

          SHA1

          1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

          SHA256

          fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

          SHA512

          cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

        • C:\Users\Admin\AppData\Local\ff4b3cd0-a953-4de5-bc46-5112cba09b7e\a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a.exe

          Filesize

          735KB

          MD5

          3c2b31e7c091650e12934ee8eeaeeb58

          SHA1

          5848274e0b6da2d94d28b32314a5b9b56d2d7a5e

          SHA256

          a3113438508c7141c5f4cd4ad3ea64a4e9f08a87944ad2ceb5760e539e6a8d1a

          SHA512

          fde24a46c657248611e27feb5835eb76e12ba828028b1ba514ff98cf5046f122d68e179923f6c52edec0c97edc578f7a6e0671eda12799ce4351f934db0d6100

        • memory/436-116-0x0000000000410000-0x0000000000411000-memory.dmp

          Filesize

          4KB

        • memory/688-164-0x0000000000A40000-0x0000000000B40000-memory.dmp

          Filesize

          1024KB

        • memory/864-74-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/864-67-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/864-72-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1444-46-0x00000000007A0000-0x00000000008A0000-memory.dmp

          Filesize

          1024KB

        • memory/1444-47-0x00000000005E0000-0x000000000062B000-memory.dmp

          Filesize

          300KB

        • memory/1492-191-0x0000000000960000-0x0000000000A60000-memory.dmp

          Filesize

          1024KB

        • memory/2544-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2544-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2544-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2544-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2544-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2980-20-0x0000000000710000-0x00000000007AB000-memory.dmp

          Filesize

          620KB

        • memory/3248-84-0x00000000008B0000-0x00000000009B0000-memory.dmp

          Filesize

          1024KB

        • memory/3320-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3320-30-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3320-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3320-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3320-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3320-56-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3320-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3320-62-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3320-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3320-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3680-71-0x00000000008E0000-0x00000000008E4000-memory.dmp

          Filesize

          16KB

        • memory/3680-70-0x0000000000970000-0x0000000000A70000-memory.dmp

          Filesize

          1024KB

        • memory/3784-1-0x0000000000720000-0x00000000007BA000-memory.dmp

          Filesize

          616KB

        • memory/3784-2-0x00000000021D0000-0x00000000022EB000-memory.dmp

          Filesize

          1.1MB

        • memory/4264-87-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/4268-52-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/4268-77-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/4268-51-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/4268-48-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/5040-139-0x00000000009A0000-0x0000000000AA0000-memory.dmp

          Filesize

          1024KB

        • memory/5068-110-0x0000000000A00000-0x0000000000B00000-memory.dmp

          Filesize

          1024KB