Analysis

  • max time kernel
    299s
  • max time network
    307s
  • 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, 04:53

General

  • Target

    6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe

  • Size

    811KB

  • MD5

    6e1ad02bf816694f51cee197284676d7

  • SHA1

    d77d8bfef363dac6948ffd59041520e177884b42

  • SHA256

    6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e

  • SHA512

    4a29311f123e27773287264f82bf913b0a4cbc4424aae0c3d3bd4315f3b6a280f03ef1d1bc76e920238a66aa90b49d14eb3ed6804f0450491546d093ea47bab4

  • SSDEEP

    12288:sJV6RP01LjFq2cSOW/XGXsMUBtB6yOKxipkRJJ9DsJYTM9rH+kVg4G18Tt:HINcC2X+t8nKxipkDJOH9rH+H1G

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .cdwe

  • offline_id

    dSwr1XNNi5cIitB5eDPbMANcusB1dWGDB8ToUnt1

  • 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-e21iz7dS58 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: 0842ASdw

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 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe
    "C:\Users\Admin\AppData\Local\Temp\6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4372
    • C:\Users\Admin\AppData\Local\Temp\6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe
      "C:\Users\Admin\AppData\Local\Temp\6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4828
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\609fa6bd-59af-4c0d-8b22-38c39690a586" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4116
      • C:\Users\Admin\AppData\Local\Temp\6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe
        "C:\Users\Admin\AppData\Local\Temp\6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2928
        • C:\Users\Admin\AppData\Local\Temp\6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe
          "C:\Users\Admin\AppData\Local\Temp\6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:656
          • C:\Users\Admin\AppData\Local\3e574088-1159-4aeb-8193-7f855ba9080c\build2.exe
            "C:\Users\Admin\AppData\Local\3e574088-1159-4aeb-8193-7f855ba9080c\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4168
            • C:\Users\Admin\AppData\Local\3e574088-1159-4aeb-8193-7f855ba9080c\build2.exe
              "C:\Users\Admin\AppData\Local\3e574088-1159-4aeb-8193-7f855ba9080c\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:4132
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 1908
                7⤵
                • Program crash
                PID:4608

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        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

          a80c989f02c6438c57ff08ace0bcc76b

          SHA1

          49408336eb66ed1d6b0e01da18535f26a3ca4ff6

          SHA256

          8b192448875fbc304724beea1d08cf0d9f34bae2e721305f09682fb29cea4f1b

          SHA512

          d04a0849ab40572573c3324fa769bbfc74a65f7b42c5a40785d1a52d85a27cef76e1ed0206da252647e5be02d1f5f9b4286ed1311cfce6ad1d7c078721955c28

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

          Filesize

          392B

          MD5

          29894420414aa249f11bf24abbe386af

          SHA1

          1bc7c7de6768ad408c07732d1a58d30389332cce

          SHA256

          e2350b4f45ed79c77890ad2e4e6c42037d78c3e5b86007c4b87e8d2ed4cc62be

          SHA512

          4c545c46f86f6bf5f05d56a2cc8486f1cb48410d7ba7b47145b2f09ac4d2b71b7c346f0cf711ba836877f6464f01c8b152aef84dff9938e7788231230126083d

        • C:\Users\Admin\AppData\Local\3e574088-1159-4aeb-8193-7f855ba9080c\build2.exe

          Filesize

          341KB

          MD5

          58d27cdb2dd179af830b8f913fb0eb13

          SHA1

          668899ba8d286f36757f69ac1ef6cb89b3794479

          SHA256

          4bff957a94d3ec4efb8b07969a1e82dc9abbc19c897d3cd8def3d4a11ce300ed

          SHA512

          cd220f57394c5660b5c01123ce5fc269c1a6afb7f34081136469d2aa4b49435c3f962d34b69bb3169cb864f745160d032896c9a0d699386a5c39ee18b0129c01

        • C:\Users\Admin\AppData\Local\3e574088-1159-4aeb-8193-7f855ba9080c\build2.exe

          Filesize

          192KB

          MD5

          5d559f4ba8fedb485128d9389b778296

          SHA1

          aff6e3e6db266f0138081e18ffbd477a6165a418

          SHA256

          f4dbc0a7903fd76a8a774a4d7651890626dc7b6dc359401ee0c605d5316c758c

          SHA512

          6b4b2f9374d0ba4b8bbad3ea91adec13323acb359cba5a23d914bb9e5ded0f1f27c6fc23342170c6250bb469655e0660d5dde8c03db5705dfab52555bfeadc36

        • C:\Users\Admin\AppData\Local\3e574088-1159-4aeb-8193-7f855ba9080c\build2.exe

          Filesize

          358KB

          MD5

          c4070da9f9b0581171af16e681ccdff8

          SHA1

          3fb4182921fdc3acd7873ebe113ac5522585312a

          SHA256

          26063c78e5418610471a9f3a00a155d7d1e5b29856e1979ba3bdc42681a871d0

          SHA512

          c7569cea7f1a841e7cac9cd41287dba3bcacf2cf9dee7bece88800848a7ad5dc4cd2bdc896c7389f0f1144079bbe168048b3f722bcd76fa5d6e14f3081bb6427

        • C:\Users\Admin\AppData\Local\609fa6bd-59af-4c0d-8b22-38c39690a586\6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e.exe

          Filesize

          811KB

          MD5

          6e1ad02bf816694f51cee197284676d7

          SHA1

          d77d8bfef363dac6948ffd59041520e177884b42

          SHA256

          6e83d5dae916b6c88c9a3c93b6c7c55c5f582c2ecdaa97a89a0d8fc803e8113e

          SHA512

          4a29311f123e27773287264f82bf913b0a4cbc4424aae0c3d3bd4315f3b6a280f03ef1d1bc76e920238a66aa90b49d14eb3ed6804f0450491546d093ea47bab4

        • memory/656-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/656-42-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/656-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/656-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/656-57-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/656-56-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/656-55-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/656-53-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/656-30-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/656-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2928-20-0x00000000024B0000-0x000000000254E000-memory.dmp

          Filesize

          632KB

        • memory/4132-51-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/4132-45-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/4132-39-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/4132-46-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/4168-44-0x0000000000530000-0x000000000057B000-memory.dmp

          Filesize

          300KB

        • memory/4168-40-0x00000000005A0000-0x00000000006A0000-memory.dmp

          Filesize

          1024KB

        • memory/4168-59-0x0000000000530000-0x000000000057B000-memory.dmp

          Filesize

          300KB

        • memory/4372-2-0x00000000025D0000-0x00000000026EB000-memory.dmp

          Filesize

          1.1MB

        • memory/4372-1-0x0000000002530000-0x00000000025CE000-memory.dmp

          Filesize

          632KB

        • memory/4828-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4828-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4828-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4828-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4828-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB