Analysis

  • max time kernel
    296s
  • max time network
    158s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-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 14 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
  • Loads dropped DLL 6 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
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 49 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:2976
    • 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:2136
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\9d530b51-7c10-4fdb-ab63-a2b5b16c0b86" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2844
      • 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:1432
        • C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe
          "C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2708
          • C:\Users\Admin\AppData\Local\57248a62-37c4-4061-a127-d2d63976b737\build2.exe
            "C:\Users\Admin\AppData\Local\57248a62-37c4-4061-a127-d2d63976b737\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2896
            • C:\Users\Admin\AppData\Local\57248a62-37c4-4061-a127-d2d63976b737\build2.exe
              "C:\Users\Admin\AppData\Local\57248a62-37c4-4061-a127-d2d63976b737\build2.exe"
              6⤵
              • Executes dropped EXE
              • Modifies system certificate store
              • Suspicious use of WriteProcessMemory
              PID:1652
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1652 -s 1456
                7⤵
                • Loads dropped DLL
                • Program crash
                PID:1268

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

    7ca6307f3c6d3c642387da9b50996fb4

    SHA1

    77e6ae6ab6a970e4631f29dc8a9aa821b6c7e8b5

    SHA256

    0edec2cce9043228dfc3f439bb54181f368c48b5c54b5390e8585d854d423c77

    SHA512

    61b17213073e42952ff4ba1ee4638269b64235a1dcfe497ec8db34c9a9b24bdd5e8cf0bfd1af747a3a37ffc09296b80501274e7f6507caf5257d9acf56e47205

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    2444f211e7d2e7896e276a07a9b60eea

    SHA1

    4b753eb531fac26dd798d52fc9ff58877d72dd16

    SHA256

    f2aed7c92bf7d3560676cacac94a35500c3a76ce2b023f0c1feb4b58f57afe9a

    SHA512

    d553182641e07706565562ed5920a6e779132aec17bc57f9ed24b2c4101bec692cb0cbdb3a88f865f83f5edb0cff640f043c6a784abb0d550f52c886f2154731

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    81196706f8118da495eaed0213450462

    SHA1

    4ca806d4fceb33f22c16b7f265f1d45cbf66ee09

    SHA256

    cb7712bb4bff270e326d90d879b3c08cae006cc0a104c5b1cd1fe75e64dbb859

    SHA512

    f383223651e389e5da3931ecb33925e13b954c6241506969802144ee9ce7b5447ba7343ed4ff760e9644832c4abb0ab1ed36fc12bfb07f102a8d67b0161f969f

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

    Filesize

    392B

    MD5

    ea52eae0b1ac7dc634c6e69553977bb2

    SHA1

    a5175b2445970384d0a45ea34aadc8fb3978baed

    SHA256

    8025f9084aeadb1947f27ba37402c2b91aa5e1308112615dfe24806802fdefb7

    SHA512

    856f0e5202694fbd257ccd224b368b74c4b3782525d82f5b6f12bddc51f6c7159d0335a12115f46e38761fa100ec2ee6e95223beb54c8cedda59eaa11f320b1c

  • C:\Users\Admin\AppData\Local\9d530b51-7c10-4fdb-ab63-a2b5b16c0b86\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe

    Filesize

    823KB

    MD5

    2ef95cac7a29f753ddd6722ad578638b

    SHA1

    ae4b034b625e18192d3f1e4da6a06c56e9241848

    SHA256

    7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668

    SHA512

    08335b9087c9d642935db87223b9a7e6ada2ff9f7a3b4431e7a0200112d11dfe51e0fd0931694a98eba48ee881eefcee37c51bb83892a3b7f9e05b7b38f5d31c

  • C:\Users\Admin\AppData\Local\Temp\Cab6A38.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar980C.tmp

    Filesize

    171KB

    MD5

    9c0c641c06238516f27941aa1166d427

    SHA1

    64cd549fb8cf014fcd9312aa7a5b023847b6c977

    SHA256

    4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

    SHA512

    936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

  • \Users\Admin\AppData\Local\57248a62-37c4-4061-a127-d2d63976b737\build2.exe

    Filesize

    358KB

    MD5

    c4070da9f9b0581171af16e681ccdff8

    SHA1

    3fb4182921fdc3acd7873ebe113ac5522585312a

    SHA256

    26063c78e5418610471a9f3a00a155d7d1e5b29856e1979ba3bdc42681a871d0

    SHA512

    c7569cea7f1a841e7cac9cd41287dba3bcacf2cf9dee7bece88800848a7ad5dc4cd2bdc896c7389f0f1144079bbe168048b3f722bcd76fa5d6e14f3081bb6427

  • memory/1432-28-0x0000000000350000-0x00000000003E2000-memory.dmp

    Filesize

    584KB

  • memory/1432-29-0x0000000000350000-0x00000000003E2000-memory.dmp

    Filesize

    584KB

  • memory/1652-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1652-194-0x0000000000400000-0x000000000065E000-memory.dmp

    Filesize

    2.4MB

  • memory/1652-73-0x0000000000400000-0x000000000065E000-memory.dmp

    Filesize

    2.4MB

  • memory/1652-72-0x0000000000400000-0x000000000065E000-memory.dmp

    Filesize

    2.4MB

  • memory/1652-68-0x0000000000400000-0x000000000065E000-memory.dmp

    Filesize

    2.4MB

  • memory/2136-7-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2136-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2136-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2136-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2136-8-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2708-61-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2708-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2708-201-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2708-200-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2708-49-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2708-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2708-199-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2708-48-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2708-197-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2896-71-0x0000000000460000-0x00000000004AB000-memory.dmp

    Filesize

    300KB

  • memory/2896-64-0x0000000000280000-0x0000000000380000-memory.dmp

    Filesize

    1024KB

  • memory/2976-1-0x00000000002B0000-0x0000000000342000-memory.dmp

    Filesize

    584KB

  • memory/2976-0-0x00000000002B0000-0x0000000000342000-memory.dmp

    Filesize

    584KB

  • memory/2976-3-0x0000000001DE0000-0x0000000001EFB000-memory.dmp

    Filesize

    1.1MB