Resubmissions

12/05/2024, 21:30

240512-1cjvlsbc6910

12/05/2024, 21:24

240512-z9hs5sgb3t10

12/05/2024, 19:58

240512-yqasragh2410

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/05/2024, 21:30

General

  • Target
    2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe
  • Size 732KB
  • Sample240512-1cjvlsbc69
  • SHA256 2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

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

Attributes
  • extension

    .paaa

  • offline_id

    QpSpHegISEXzDsMT78wU4MUmX8Ptl2rkBOQjG2t1

  • 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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0870PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 21 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Renames multiple (149) files with added filename extension

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 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 4 IoCs

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

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe
    "C:\Users\Admin\AppData\Local\Temp\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4724
    • C:\Users\Admin\AppData\Local\Temp\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe
      "C:\Users\Admin\AppData\Local\Temp\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2908
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\d7913726-afed-42a8-b1eb-94f490c5eb8f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1532
      • C:\Users\Admin\AppData\Local\Temp\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe
        "C:\Users\Admin\AppData\Local\Temp\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:908
        • C:\Users\Admin\AppData\Local\Temp\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe
          "C:\Users\Admin\AppData\Local\Temp\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2868
  • C:\Users\Admin\AppData\Local\d7913726-afed-42a8-b1eb-94f490c5eb8f\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe
    C:\Users\Admin\AppData\Local\d7913726-afed-42a8-b1eb-94f490c5eb8f\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe --Task
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2572
    • C:\Users\Admin\AppData\Local\d7913726-afed-42a8-b1eb-94f490c5eb8f\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe
      C:\Users\Admin\AppData\Local\d7913726-afed-42a8-b1eb-94f490c5eb8f\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe --Task
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:4528

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 1KB
        • SHA256 bf8250097eb58e963c7cd636093d2a332647af517ad22ddebe1765703b8dd199
        • 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 68ad5b77ade91213e76a14c5b4680aa73c49708b3567ee82788f558a94bbe5b4
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 392B
        • SHA256 def77efe8d2c37ba3d4932ebedc5db15ff1b80cd056025e53ca7e0a366b52410
        • MD5 SHA1 SHA512

        2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe

        • Path C:\Users\Admin\AppData\Local\d7913726-afed-42a8-b1eb-94f490c5eb8f\2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff.exe
        • Size 732KB
        • SHA256 2bd6f0743a3ecab9f463af0a244ccf98bcc0fe5a3f28f048dbb15112e5a214ff
        • MD5 SHA1 SHA512 SSDEEP

        memory/908-23-0x0000000000400000-0x000000000080E000-memory.dmp

        memory/908-22-0x0000000000400000-0x000000000080E000-memory.dmp

        memory/2868-24-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-21-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-43-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-33-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-20-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-41-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-44-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-45-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-345-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-346-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-30-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-29-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2868-31-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2908-17-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2908-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2908-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2908-4-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2908-3-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4528-37-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4528-38-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4724-1-0x0000000002460000-0x00000000024FC000-memory.dmp

        memory/4724-2-0x0000000002500000-0x000000000261B000-memory.dmp