Analysis

  • max time kernel
    144s
  • max time network
    113s
  • 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, 07:58

General

  • Target

    5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe

  • Size

    797KB

  • MD5

    e0f4511d749587854a4513380c78c0c1

  • SHA1

    11b656344f3e81f3574d8addd348430efcbb8a04

  • SHA256

    5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7

  • SHA512

    53eea41de3d9788e48a3e5be32b322fb81769488cdebcff206a7f0e2500253977e8a3e1feebe087e8dccad05d279661f28fafae36f7eca92a3b02f2b1ff6e48c

  • SSDEEP

    24576:nLZZzpVzAyjUykiCbIp7KAhY8SW49NvXJ/aOHK:DDLz1CUwAhLSxNvXJ/9

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\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe
    "C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3844
    • C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe
      "C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4380
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b032fdc8-3c7d-4315-b41f-49c7af7877db" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2316
      • C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe
        "C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4836
        • C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe
          "C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1236

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

    7f8a706187165033cc4df123f3f82ad2

    SHA1

    42b2890d5f9d5e5b4e826c3622282f2cf60b9446

    SHA256

    379fa5169261f064b5b95f578be9035ad2f26ea5e328bf4034dac594e3e37806

    SHA512

    b602c3e495aaaf59984f6458997597c1132f5e980f0624b12dcbf361f99441e3d312a1eb3b9978c3fba16fb8eae41d905bfa21e9938eee1d51ffce768d7310b2

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

    Filesize

    392B

    MD5

    6879ab3c3b1cc16a7fc8b28bbe3f710c

    SHA1

    e1463905da5434470e34293f2fbcd4d2642d5f64

    SHA256

    f10f930241584c39f5413f9108031f3704f378b0c2cc7caf418bc827c6d67e1d

    SHA512

    261e0a8d3b1daf417fe99a1cb30ca6e8cae1fe89742148a9b3a0df6904d3298a29f2afc0d8864bef51d61cdfec1b341f2488c02bf5d11195e5b42d58c6330322

  • C:\Users\Admin\AppData\Local\b032fdc8-3c7d-4315-b41f-49c7af7877db\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe

    Filesize

    797KB

    MD5

    e0f4511d749587854a4513380c78c0c1

    SHA1

    11b656344f3e81f3574d8addd348430efcbb8a04

    SHA256

    5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7

    SHA512

    53eea41de3d9788e48a3e5be32b322fb81769488cdebcff206a7f0e2500253977e8a3e1feebe087e8dccad05d279661f28fafae36f7eca92a3b02f2b1ff6e48c

  • memory/1236-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-21-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1236-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3844-2-0x0000000002710000-0x000000000282B000-memory.dmp

    Filesize

    1.1MB

  • memory/3844-1-0x0000000000A00000-0x0000000000A9E000-memory.dmp

    Filesize

    632KB

  • memory/4380-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4380-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4380-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4380-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4380-15-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4836-18-0x0000000000C10000-0x0000000000CA3000-memory.dmp

    Filesize

    588KB