Analysis

  • max time kernel
    143s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-05-2024 12:57

General

  • Target

    d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe

  • Size

    709KB

  • MD5

    93c4185d6bd7d35620815e99aa6d9f2b

  • SHA1

    01c3bfaffb1496d0b4b2d52e21db58dc76d2dd39

  • SHA256

    d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697

  • SHA512

    8f21de65cc56a4c20a3211b6d598b748c1115d08cb44d2f086c6b5e5c26b3e572b956a361d05e8c2495a8e43097ba79b1f49c73e097f4f9d8a65664ef95722f0

  • SSDEEP

    12288:w/JSh8Uu2rB9DIuiqetcEFT39g+0qzyvbtvQRXUyfZwj:wBShZrTDIsmFD9FWvsvBs

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .vepi

  • 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: 0871PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 15 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • 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\d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe
    "C:\Users\Admin\AppData\Local\Temp\d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:332
    • C:\Users\Admin\AppData\Local\Temp\d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe
      "C:\Users\Admin\AppData\Local\Temp\d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2068
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\84feb6c7-2e90-4700-ae7e-ce79101a93ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1344
      • C:\Users\Admin\AppData\Local\Temp\d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe
        "C:\Users\Admin\AppData\Local\Temp\d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2628
        • C:\Users\Admin\AppData\Local\Temp\d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe
          "C:\Users\Admin\AppData\Local\Temp\d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1980

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

    43784c60af395e4e8d1cb7bf78363626

    SHA1

    69424fc9f079764fe5005651761755b323d40990

    SHA256

    d8a839cc1840c3e37318da607cb3cac2a9f0a180bc3b8cbbda280819aaeabcf2

    SHA512

    09910f5d1238429e9e0821d92fa424aca91b645d3f63fa1dde86f588337a9d8f509af122ca11def42975bb89d3e565afa7f9c0f47a1981f0f513b0a2ef71f1a6

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

    Filesize

    392B

    MD5

    c25bd174e1f12cc0f4e66a655ddc62fb

    SHA1

    b530493dad2727c60b1b5407baa3120b71d57f3b

    SHA256

    26e7a43a7aee8380c332b7953cf3f933e4b40a564e45ae3fbb473e2bf31eb5f5

    SHA512

    b6c62261eed51281e31e4ba9d2d9186d939c19991931b2b1c2a93b4d655f55f36f2c2dbe6b98b09a8278a19a9f8b7374be42ef83050f90d45dacc4f8164673b5

  • C:\Users\Admin\AppData\Local\84feb6c7-2e90-4700-ae7e-ce79101a93ff\d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697.exe

    Filesize

    709KB

    MD5

    93c4185d6bd7d35620815e99aa6d9f2b

    SHA1

    01c3bfaffb1496d0b4b2d52e21db58dc76d2dd39

    SHA256

    d90d58df54d765277aad8627085dd15a61b0fafbc794f14b5f81a42807408697

    SHA512

    8f21de65cc56a4c20a3211b6d598b748c1115d08cb44d2f086c6b5e5c26b3e572b956a361d05e8c2495a8e43097ba79b1f49c73e097f4f9d8a65664ef95722f0

  • memory/332-3-0x0000000004280000-0x000000000439B000-memory.dmp

    Filesize

    1.1MB

  • memory/332-1-0x0000000004140000-0x00000000041D7000-memory.dmp

    Filesize

    604KB

  • memory/1980-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1980-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1980-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1980-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1980-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1980-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1980-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1980-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1980-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2068-2-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2068-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2068-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2068-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2068-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB