Analysis

  • max time kernel
    142s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-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.

  • 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\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
    "C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3844
    • C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
      "C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:392
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\2d6c7953-2aac-4621-b12c-c1439b7d44a4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3972
      • 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:5088
        • C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
          "C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2796

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

    b5e47a9c5ad308667083d98698e98423

    SHA1

    1ef2cd5ffa701d79d3d5d6206702fff5b11c7fa6

    SHA256

    c73b050b1adabc4c6c109640e3f61ad42725fb390e470d199fdb797111dbd65c

    SHA512

    b44aafba068c126cb41f35658ac449de225c64cf37662730fe96cd7ab83538828964dfa118f77b404cfece7c8d4f54939f57b7bf01ad9387c2ab29b009bd0a28

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

    Filesize

    392B

    MD5

    07a0362933d61640420f606e8a57ebf1

    SHA1

    c62122f7da8de4e20bd06cf0069841b1b02d6768

    SHA256

    f18619b45ae44974bb3977f4e4e0e898794faff3419f11b0c09b00e1e8b9c7f1

    SHA512

    dc63ad4bf570b5761c976843c3cabf11193671fd2a856bf197b335e5523c30c16741ae0f18c6696af11cd30af186445c1ef10629d16822053ff51d17f0901e80

  • C:\Users\Admin\AppData\Local\2d6c7953-2aac-4621-b12c-c1439b7d44a4\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe

    Filesize

    710KB

    MD5

    f9139094053186c48b13bc99c9adf7b3

    SHA1

    bc35ca5986f7f6bd25fdf532bd6479de79f06335

    SHA256

    844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08

    SHA512

    8f33df09e10d594ab3c99c21f91b3d9846950362d137fce1236ad00f4fbdf25fcfaea25790447a18154300c809f4e767661deb9235b098bfd88860e285feef8c

  • memory/392-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/392-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/392-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/392-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/392-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2796-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2796-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2796-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2796-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2796-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2796-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2796-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2796-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2796-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3844-2-0x0000000004A50000-0x0000000004B6B000-memory.dmp

    Filesize

    1.1MB

  • memory/3844-1-0x00000000049A0000-0x0000000004A42000-memory.dmp

    Filesize

    648KB