Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    22-05-2024 19:18

General

  • Target

    844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe

  • Size

    710KB

  • MD5

    f9139094053186c48b13bc99c9adf7b3

  • SHA1

    bc35ca5986f7f6bd25fdf532bd6479de79f06335

  • SHA256

    844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08

  • SHA512

    8f33df09e10d594ab3c99c21f91b3d9846950362d137fce1236ad00f4fbdf25fcfaea25790447a18154300c809f4e767661deb9235b098bfd88860e285feef8c

  • SSDEEP

    12288:SddazWg8qwt/BWN2Df90NqLiyz5a8HpnhTLPN/9mEPQXKLA2fPXX2P:SdAz78tj02DfSsLbzhHphHTqEAcPW

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\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
    "C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3264
    • C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
      "C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3520
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\d59068e2-e584-456c-a971-da328e4088e9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2272
      • C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
        "C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1100
        • C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
          "C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1156

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

    6728aea2631b86a76c237508d8ba9b55

    SHA1

    7a670f95cac088313f7558869162fe01c6dc0ec9

    SHA256

    e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b

    SHA512

    533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5

  • 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

    a5d4f088e96547b3dab304f5e0304405

    SHA1

    b1ad96e1306891dfab6e6b894b637bc28b8e6b9f

    SHA256

    99248eebdb235875f09fd672cf8dda845555b8a53db4705527f9c5549e1f68c4

    SHA512

    4ec954b05a92ed6fc140011964d8e843f5ec825ecb1da428f06f4e7318492a8d1d6658151ba91dbd08b83310cb89b4e121ea24ca5e2b88555650d5a9fd0c4fd5

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

    Filesize

    392B

    MD5

    db3708e6920e8bce34b8d783b599ae4c

    SHA1

    34349d4b5ed7f608164bd187cf4d26ce21a7101a

    SHA256

    b3e090c7e06f4ed7c7d5a89ba5bb7694b160182a49cab7f3410dc63a5be3a5ff

    SHA512

    43651210ff4fa6b62eaf2868defc927c5765014976d937f1264d19207ceb0c5bbf7e39dcbf48720983da262e9b519ae1399442dc37c1e4fb45150ac808ccc15f

  • C:\Users\Admin\AppData\Local\d59068e2-e584-456c-a971-da328e4088e9\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe

    Filesize

    710KB

    MD5

    f9139094053186c48b13bc99c9adf7b3

    SHA1

    bc35ca5986f7f6bd25fdf532bd6479de79f06335

    SHA256

    844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08

    SHA512

    8f33df09e10d594ab3c99c21f91b3d9846950362d137fce1236ad00f4fbdf25fcfaea25790447a18154300c809f4e767661deb9235b098bfd88860e285feef8c

  • memory/1156-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1156-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1156-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1156-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1156-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1156-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1156-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1156-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1156-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3264-1-0x0000000004A10000-0x0000000004AA3000-memory.dmp

    Filesize

    588KB

  • memory/3264-2-0x0000000004B00000-0x0000000004C1B000-memory.dmp

    Filesize

    1.1MB

  • memory/3520-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3520-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3520-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3520-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3520-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB