Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/04/2024, 04:32

General

  • Target

    71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe

  • Size

    774KB

  • MD5

    d201b331c5953dd3271f84a687e893b4

  • SHA1

    18f7ec36314d7eb2dfb695a1d6629ef17a45ba62

  • SHA256

    71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364

  • SHA512

    4d93d9d6876ee49fd9878ea0f35e09ba1798a33bad8d0b0a54696c48c8f9a147f57de7c9947f06fbdf4853a9a9161e06a167a3db4531ded9adbfa52de67741c0

  • SSDEEP

    24576:42B0dAqubtqQKHYxDlZpOlClp4iJ6CEK:edAVoQKHYBoAF6CE

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .uajs

  • offline_id

    Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1

  • 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/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 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: 0859PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 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\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe
    "C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:5060
    • C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe
      "C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1472
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\0c4848a0-d056-4bf9-821b-96f4bc6d743a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3492
      • C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe
        "C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4488
        • C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe
          "C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2508

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

    77fff4010e48018b867bb350fb78b7c2

    SHA1

    31b0dfcc0b92a789cd5c94dbf8d0f5aca820ed31

    SHA256

    3e95094f49fea7951fb5ea5551a8b344c1ec16ddaf4f5da7b6bfe1151afa9ee5

    SHA512

    78a8fc7de1b3cbbc2225790bf55fd64b3c7fa922b4601dcbb1103cc12491da71ebae1eebfaa3a2ce2e0b3b3a7b7229dd448012c23a707f84aae8fe0e996c7e89

  • 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

    b3b455ac23970e6752a0845e70df81ce

    SHA1

    b1edc1e89a93421dd6e12441b5383c8f9d231272

    SHA256

    8d20183789e2a2bbdaa48b2c78aa287abd8ed33e935942862755eaf0259d2c30

    SHA512

    1b08ded060db3f95330f0b6c14373c8ef9ada68153f4ef766d9802c79ae0d9cfcb8c9473e63f12ddbdfc63cb76a840c6d00c6fdf28110b39b748e50332a85fd1

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

    Filesize

    392B

    MD5

    f83226d8b7744b693b9089e623b22664

    SHA1

    2472fe76b8d706ed072638ab5d03d71283defcdb

    SHA256

    40a2845cf337d027cf6ef2395855bdbab0f06398761053043ec7b3143402cb2e

    SHA512

    97530a24fff295273d2d5f202c97a327e8c9c174691bc21970c03d4b695f2b661554ff69c56f8ec88cbf759e0fb127caa441b477ea85e1a977d35838dada6003

  • C:\Users\Admin\AppData\Local\0c4848a0-d056-4bf9-821b-96f4bc6d743a\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe

    Filesize

    774KB

    MD5

    d201b331c5953dd3271f84a687e893b4

    SHA1

    18f7ec36314d7eb2dfb695a1d6629ef17a45ba62

    SHA256

    71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364

    SHA512

    4d93d9d6876ee49fd9878ea0f35e09ba1798a33bad8d0b0a54696c48c8f9a147f57de7c9947f06fbdf4853a9a9161e06a167a3db4531ded9adbfa52de67741c0

  • memory/1472-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1472-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1472-15-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1472-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1472-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-21-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2508-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4488-18-0x0000000002FC0000-0x000000000305B000-memory.dmp

    Filesize

    620KB

  • memory/5060-2-0x0000000004A30000-0x0000000004B4B000-memory.dmp

    Filesize

    1.1MB

  • memory/5060-1-0x0000000002F00000-0x0000000002F93000-memory.dmp

    Filesize

    588KB