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