Analysis

  • max time kernel
    145s
  • max time network
    144s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    02/04/2024, 19:01

General

  • Target
    be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
  • Size 719KB
  • Sample240402-xpmv9aae87
  • SHA256 be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://sajdfue.com/raud/get.php

Attributes
  • extension

    .kaaa

  • offline_id

    RYwGAer1qFhOx8AGvEwPaJsJ2FKa8ifjKW9FVet1

  • payload_url

  • 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 $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0862PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 24 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Renames multiple (155) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Executes dropped EXE 4 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 5 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
    "C:\Users\Admin\AppData\Local\Temp\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3852
    • C:\Users\Admin\AppData\Local\Temp\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
      "C:\Users\Admin\AppData\Local\Temp\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4432
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4996
      • C:\Users\Admin\AppData\Local\Temp\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
        "C:\Users\Admin\AppData\Local\Temp\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4624
        • C:\Users\Admin\AppData\Local\Temp\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
          "C:\Users\Admin\AppData\Local\Temp\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3268
  • C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
    C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe --Task
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4076
    • C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
      C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe --Task
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:3524
  • C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
    C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe --Task
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3068
    • C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
      C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe --Task
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:1984

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 1KB
        • SHA256 f8ab0227091978f14c8ef610aecaff032714787ebce7f213171116cadf14ba15
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 724B
        • SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
        • MD5 SHA1 SHA512

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 410B
        • SHA256 f5ca162e23c36187254f7dfcbc16223323e67dbf5ad9cfc75a960c44fd5ced50
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 392B
        • SHA256 2d32e75fad96efed854a8cba69e35a04fc89bc38abcde8e45dbfa56f0cba5d19
        • MD5 SHA1 SHA512

        be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe

        • Path C:\Users\Admin\AppData\Local\18610dce-6c9e-4eba-afee-7459096ff5cf\be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc.exe
        • Size 719KB
        • SHA256 be7fdfefa6dac04e9183e54a76fdca06fb8bf501381ce0d0fe9a227f452a20fc
        • MD5 SHA1 SHA512 SSDEEP

        memory/1984-50-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1984-48-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1984-49-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1984-47-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3068-44-0x0000000004920000-0x00000000049BB000-memory.dmp

        memory/3268-31-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3268-32-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3268-23-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3268-22-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3268-373-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3268-371-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3268-25-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3268-55-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3268-57-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3268-58-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3524-40-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3524-41-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3524-42-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3524-39-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3852-1-0x0000000004A40000-0x0000000004AE0000-memory.dmp

        memory/3852-2-0x0000000004BC0000-0x0000000004CDB000-memory.dmp

        memory/4076-36-0x0000000004930000-0x00000000049CF000-memory.dmp

        memory/4432-4-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4432-3-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4432-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4432-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4432-17-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4624-20-0x0000000004980000-0x0000000004A21000-memory.dmp