Analysis

  • max time kernel
    297s
  • max time network
    303s
  • platform
    windows10-1703_x64
  • resource
    win10-20231220-en
  • resource tags

    arch:x64arch:x86image:win10-20231220-enlocale:en-usos:windows10-1703-x64system
  • submitted
    15/01/2024, 04:53

General

  • Target

    7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe

  • Size

    823KB

  • MD5

    2ef95cac7a29f753ddd6722ad578638b

  • SHA1

    ae4b034b625e18192d3f1e4da6a06c56e9241848

  • SHA256

    7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668

  • SHA512

    08335b9087c9d642935db87223b9a7e6ada2ff9f7a3b4431e7a0200112d11dfe51e0fd0931694a98eba48ee881eefcee37c51bb83892a3b7f9e05b7b38f5d31c

  • SSDEEP

    12288:Bu4Z0Rr/foApQ8BpUlsVHZ/w6P/VAspkABjeBjWtsHVj9OQBNemak+W9lPJ:Bu4aRjfLzBpysPCqkGqjWt+pBema30x

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\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe
    "C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:316
    • C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe
      "C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2684
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\28ce7fef-f09c-4687-a619-5f0ca079d85e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1148
      • C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe
        "C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2860
        • C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe
          "C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2004
          • C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe
            "C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1800
  • C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe
    "C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe"
    1⤵
    • Executes dropped EXE
    PID:396
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 396 -s 1908
      2⤵
      • Program crash
      PID:3708

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

          feecae61d880321dbbd0d32522d4b852

          SHA1

          ee78bf411a139889dc1a691c4277e0e3e3629f7e

          SHA256

          c55c8a7bd3391a265396f6f8de0490ca8784803c259dfaccb8ecfa83fa04ad12

          SHA512

          c94e488487cd21b32be4b964da8f53fb75e0f38df71b58b8f3b391d47d8337207ec8b51c94b9d7178677b48265200366c1db1456ddbe042a80377a6c555bc14a

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

          Filesize

          392B

          MD5

          3540b29390984ff8967c0eee238c907a

          SHA1

          65e1a15c73b1695308f73c154673cde04c201b23

          SHA256

          a7d25b5295a544a47958707fde8445fbc8d47b3f5670bae304239bc37c9f8d47

          SHA512

          32cd7ab111b1155398e9ad38f0b0c273106b38b2942900a1c94bb464d26f79607da798da3a8bf7535311288e776e9a362d7c8f4baab2cfcb828cfe5caf307841

        • C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe

          Filesize

          122KB

          MD5

          cac7c1e98cd83b5b9b08e6402801e543

          SHA1

          c84fc44831b50e3177a7a6d5b96202a91c883b72

          SHA256

          b405fcbef76f9b3dd0cd40889f9475a978bde4034087dd183f97c5ffd546d4e0

          SHA512

          75cc29303a2fc0ae78fbad6120ba5cf18eae7af9d3e2b1e31e4a54e189eeb50b03c7e0b358b5b878cee769e5feeb585a7f6a4e00f1a204d58790f690cc19dc24

        • C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe

          Filesize

          64KB

          MD5

          a7f4a71c03997e5363d8851d071cf00a

          SHA1

          881489c07963f9c62d05dec13b8e6b7abadc3a3c

          SHA256

          6d3943fce8b3da19e36f379a9707a365c9c62c0c6fe706abbc3ff866a248f60b

          SHA512

          f2a982d98ee350ca3b09841294ff9ee9bb3028d6b7bab230db94ef6143f766d2b6d18814e10565b16978405398e01fd232cc0d9e608f950dbc9ec1d398f66395

        • C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe

          Filesize

          46KB

          MD5

          ba897519cf035a5d589cd1cc43e88acd

          SHA1

          0d4320c3e59b679122fbf01ff09ad95ab0ee2d47

          SHA256

          ebbe00c547df623096cbd2452fdad6345ebb45c4f2f894123dc830b4959861ee

          SHA512

          fefeff649f0ef23ce3f2f0f93ca6b2e7a535936be3fdc2269e414c1d71032e1984ec556b9f2d28142603caef13f9c759405c16577511c2b25c4d579918c1ee94

        • C:\Users\Admin\AppData\Local\28ce7fef-f09c-4687-a619-5f0ca079d85e\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe

          Filesize

          11KB

          MD5

          6628eb387c0fb4329dd464a2e690278a

          SHA1

          fe2a0e08f60b241f8963217d08a985dca531f97c

          SHA256

          7200c9ba76424154d3164e096234eb5a89e7f02635b8c019b4ca7beb09188bdf

          SHA512

          ff0112d8805e328c161d7dc4156ffbb4417a8afbcce50b5f5df3fa10a11f33b821369bfdf636a3911358ea4fd60405bbff33f7d61fc795a2b96f97c0e9e55e00

        • memory/316-2-0x0000000002300000-0x000000000241B000-memory.dmp

          Filesize

          1.1MB

        • memory/316-1-0x00000000009D0000-0x0000000000A72000-memory.dmp

          Filesize

          648KB

        • memory/396-39-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/396-43-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/396-45-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/396-51-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/1800-44-0x00000000020C0000-0x000000000210B000-memory.dmp

          Filesize

          300KB

        • memory/1800-41-0x0000000000520000-0x0000000000620000-memory.dmp

          Filesize

          1024KB

        • memory/1800-59-0x00000000020C0000-0x000000000210B000-memory.dmp

          Filesize

          300KB

        • memory/2004-30-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2004-53-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2004-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2004-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2004-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2004-57-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2004-55-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2004-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2004-56-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2004-47-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2684-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2684-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2684-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2684-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2684-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2860-22-0x00000000008A0000-0x0000000000937000-memory.dmp

          Filesize

          604KB