Analysis

  • max time kernel
    615s
  • max time network
    619s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    27/03/2024, 20:28

General

  • Target

    buildz.exe

  • Size

    728KB

  • MD5

    1ac225bc36c31f9209f984210bd68469

  • SHA1

    b43db3c1f19bca6b35e91ee88edf8c80d4e6c422

  • SHA256

    d69f5817cc5eadb99b3a8b0f87ca4a471c052f151f14180955f14ad78a1acacc

  • SHA512

    e99727b0b993b6911b402eb48c85eb81dd10b76894eabaad196618558f643ab6dd2e5c1a5d393e1537b089fdfdbe1d778c88f62fb0abd9384b461521422e53a3

  • SSDEEP

    12288:yCLwobUsKbD6axHJhie99gldRoo+uoagdWip+KSN7uO7/:yYsmaZJwAglLoo+5WioKSN7ue/

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .vook

  • offline_id

    1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1

  • payload_url

    http://sdfjhuz.com/dl/build2.exe

    http://sajdfue.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/3ed7a617738550b0a00c5aa231c0752020240316170955/d71ce1 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0857PsawqS

rsa_pubkey.plain

Extracted

Family

vidar

Version

8.6

Botnet

5739ef2bbcd39fcd59c5746bfe4238c5

C2

https://steamcommunity.com/profiles/76561199658817715

https://t.me/sa9ok

Attributes
  • profile_id_v2

    5739ef2bbcd39fcd59c5746bfe4238c5

  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 15 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 3 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\buildz.exe
    "C:\Users\Admin\AppData\Local\Temp\buildz.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3024
    • C:\Users\Admin\AppData\Local\Temp\buildz.exe
      "C:\Users\Admin\AppData\Local\Temp\buildz.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2452
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\d8aa1624-ce7e-4ee2-b975-20ac4a4eb5bd" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2100
      • C:\Users\Admin\AppData\Local\Temp\buildz.exe
        "C:\Users\Admin\AppData\Local\Temp\buildz.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1020
        • C:\Users\Admin\AppData\Local\Temp\buildz.exe
          "C:\Users\Admin\AppData\Local\Temp\buildz.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2736
          • C:\Users\Admin\AppData\Local\fb287a3e-6fca-41e7-8e54-20e161965c7e\build2.exe
            "C:\Users\Admin\AppData\Local\fb287a3e-6fca-41e7-8e54-20e161965c7e\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1248
            • C:\Users\Admin\AppData\Local\fb287a3e-6fca-41e7-8e54-20e161965c7e\build2.exe
              "C:\Users\Admin\AppData\Local\fb287a3e-6fca-41e7-8e54-20e161965c7e\build2.exe"
              6⤵
              • Executes dropped EXE
              • Modifies system certificate store
              • Suspicious use of WriteProcessMemory
              PID:1108
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1108 -s 1456
                7⤵
                • Loads dropped DLL
                • Program crash
                PID:1676

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

    4887e5c213b9a196b1e5f9bdc16f8048

    SHA1

    e8e9d7e44f6702e33a44e8ce90518500392dbc47

    SHA256

    10d47f70b1a3a7f9112bd231bcaede46d39be5480c61a6fbc1fc45cae8788880

    SHA512

    9c74a4bcfa65a82d3bb0c78ed02e2c8dab502c21fedfebd613fa3e89e6c50ebf8b290e82a3a7ae9fb77f8877aa50e217ab1a0207518253681f9379855b0d30e8

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

    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • 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

    ef0381d3baec16830875c4a1f627aaf8

    SHA1

    db6b6302c010ee014baf6935c9d05b1c10dfb75a

    SHA256

    62d1af13b59c56c6c4eab1c92665a5f5fbd590e4955df7bd169a0ed937663645

    SHA512

    53290921b0a4519a261f707a421a2fa2eaa0429f45447958d24dd37a7ba63a4e96266d533380bda5cf20bd3d15834865f2d392ce919ed364663e1b31805fa62d

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

    Filesize

    344B

    MD5

    02f552d470bf4d00aff349b8d4dbe3c5

    SHA1

    45d47497c597437b5bab8f409d02561c2d4d2270

    SHA256

    b428df158ad435b66aac9a1dd923d892b58ddcdc1c7ca578345d80719b8bfb01

    SHA512

    62e28f704d443e90d9e7dfe4b43034e4a1eeb222aea64cdbcda611da44b6827615ace2db28595965e8cdde851d125016f32f65203d7729fba0f7eb4db9f4ca09

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

    Filesize

    392B

    MD5

    bf611994af0504bbd7390912e2a276ab

    SHA1

    b34d6f28aee5bf17017143f7715799a1549d6d40

    SHA256

    ea3d51769806de901256c4d5f032f35a3c5537c5ce3456e769cbf95c6bf28402

    SHA512

    98f694bac7ba82b67c81ac2ed9a2d7e952c7adb7d2150cb8578518fd3537b6c011fbf8f0a728ae23db808a080ceb6499f1a1a2e31d3a77173353ac2d8e0ecbd8

  • C:\Users\Admin\AppData\Local\Temp\CabE5AE.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar1288.tmp

    Filesize

    171KB

    MD5

    9c0c641c06238516f27941aa1166d427

    SHA1

    64cd549fb8cf014fcd9312aa7a5b023847b6c977

    SHA256

    4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

    SHA512

    936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

  • C:\Users\Admin\AppData\Local\Temp\Tar1ECE.tmp

    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • C:\Users\Admin\AppData\Local\d8aa1624-ce7e-4ee2-b975-20ac4a4eb5bd\buildz.exe

    Filesize

    728KB

    MD5

    1ac225bc36c31f9209f984210bd68469

    SHA1

    b43db3c1f19bca6b35e91ee88edf8c80d4e6c422

    SHA256

    d69f5817cc5eadb99b3a8b0f87ca4a471c052f151f14180955f14ad78a1acacc

    SHA512

    e99727b0b993b6911b402eb48c85eb81dd10b76894eabaad196618558f643ab6dd2e5c1a5d393e1537b089fdfdbe1d778c88f62fb0abd9384b461521422e53a3

  • C:\Users\Admin\AppData\Local\fb287a3e-6fca-41e7-8e54-20e161965c7e\build2.exe

    Filesize

    277KB

    MD5

    8dae8b6a6be6e3527183594d1c26a2d3

    SHA1

    b87e40cee60869a36e79c88c8a3a34baf0bc4889

    SHA256

    afce72cd3bc717c784962083066e3ede2b0aaadbe0908ec7360096c923774fa5

    SHA512

    0bf065700db647efba39a13a58242a595907e6c11885575cf0bdad9e23ab40583c8a6535464e46d75d075e20d88b7a6305a761df9da787fdc8728483dd48f96e

  • memory/1020-28-0x0000000000220000-0x00000000002B1000-memory.dmp

    Filesize

    580KB

  • memory/1020-29-0x0000000000220000-0x00000000002B1000-memory.dmp

    Filesize

    580KB

  • memory/1108-72-0x0000000000400000-0x0000000000644000-memory.dmp

    Filesize

    2.3MB

  • memory/1108-218-0x0000000000400000-0x0000000000644000-memory.dmp

    Filesize

    2.3MB

  • memory/1108-79-0x0000000000400000-0x0000000000644000-memory.dmp

    Filesize

    2.3MB

  • memory/1108-70-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1108-78-0x0000000000400000-0x0000000000644000-memory.dmp

    Filesize

    2.3MB

  • memory/1248-77-0x0000000000230000-0x0000000000261000-memory.dmp

    Filesize

    196KB

  • memory/1248-76-0x00000000009F5000-0x0000000000A10000-memory.dmp

    Filesize

    108KB

  • memory/2452-7-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2452-8-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2452-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2452-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2452-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2736-48-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2736-73-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2736-49-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2736-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2736-55-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2736-53-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2736-56-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2736-87-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2736-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2736-220-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3024-0-0x00000000002F0000-0x0000000000381000-memory.dmp

    Filesize

    580KB

  • memory/3024-3-0x0000000001E50000-0x0000000001F6B000-memory.dmp

    Filesize

    1.1MB

  • memory/3024-1-0x00000000002F0000-0x0000000000381000-memory.dmp

    Filesize

    580KB