Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 15:49

General

  • Target

    dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe

  • Size

    708KB

  • MD5

    7f3b269130931ecd64e35f048c3a5a45

  • SHA1

    7434c49a3386c9e6efe98e7f5345c922299adf9c

  • SHA256

    dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501

  • SHA512

    b941031026e4f3e113606a69630d8fdef11e3fcb79bde51ea238f0a73f84850a52b4e64d39568be052dafc4505ae256b2f503bd38a73d6be436b63fcab86ad83

  • SSDEEP

    12288:OOfdNRXlGGDv4r+no5iA8uPurQdPbaeNTL58eGpf8lVnKKZ+2yxu6e:O2HzLnqXPEOjJhN8eGpyKGfy3

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes
  • extension

    .vehu

  • offline_id

    EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1

  • payload_url

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

    http://cajgtus.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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0872PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 15 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
    "C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2700
    • C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
      "C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4032
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\4e801223-84fe-4135-998c-49f00a2fd8ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4304
      • C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
        "C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:448
        • C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
          "C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4128

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

    df80f9ba75076db634761b6132e0d4e3

    SHA1

    07983946fb660752c7cccb2ef82d01ec4c9ecc5d

    SHA256

    d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99

    SHA512

    4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a

  • 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

    ce5564a25df9906fd8f0189ca82bb808

    SHA1

    0e8c27334d7e141ccb48fae06a537a318f0bfeec

    SHA256

    5a77df8b57d793ca0a5679dae9d235f30fd14863709e4820faa94db745fa6cd0

    SHA512

    8802964b731a586ee201443567434bb6852740bc1412ea7e0faa6b08bdedfa9edd9bc67761b0a1654085cbf13117e5f8c6e21244670be02f97e2ea6514236a64

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

    Filesize

    392B

    MD5

    53e6724ce07802f2762cad33a377bc51

    SHA1

    0e8c69d58107ffbd9952e202a8d83d82fe0f1e2c

    SHA256

    84288b623764b0e2942e24dbb6d96a89e62c382687b2b30d891ce0c3a32a4934

    SHA512

    fd080eced91715cd7df81714f9b2616a3d869c8c3a2e06fdc6fce6888bb50c11c332a599167856ed9d4674624bb434d17624adfdc11af9f0b9f4d4d52bbfea76

  • C:\Users\Admin\AppData\Local\4e801223-84fe-4135-998c-49f00a2fd8ff\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe

    Filesize

    708KB

    MD5

    7f3b269130931ecd64e35f048c3a5a45

    SHA1

    7434c49a3386c9e6efe98e7f5345c922299adf9c

    SHA256

    dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501

    SHA512

    b941031026e4f3e113606a69630d8fdef11e3fcb79bde51ea238f0a73f84850a52b4e64d39568be052dafc4505ae256b2f503bd38a73d6be436b63fcab86ad83

  • memory/2700-2-0x00000000040A0000-0x00000000041BB000-memory.dmp

    Filesize

    1.1MB

  • memory/2700-1-0x00000000025C0000-0x0000000002659000-memory.dmp

    Filesize

    612KB

  • memory/4032-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4032-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4032-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4032-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4032-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4128-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4128-25-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4128-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4128-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4128-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4128-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4128-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4128-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4128-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB