Analysis

  • max time kernel
    141s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 22:02

General

  • Target

    d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe

  • Size

    709KB

  • MD5

    a8a057d904ff939a2e74bc340391122e

  • SHA1

    2f1c5113abda6750f790d1338b15232259b6a85c

  • SHA256

    d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458

  • SHA512

    bf7fe893d919d454202c7e4f4ac618af616c22db6938175466bd2b0251e9f2fff7f4b9b205e6ee9a28200faba4ad8194f13c82600b41f7225575913121aedd0e

  • SSDEEP

    12288:jJHb/Q8qaDugZCA9R1/cxGtUcauu1xasDi4lREee3y:FHb/n5dutrRwy

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\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
    "C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3592
    • C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
      "C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2352
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\811d6e58-b508-4e84-bede-57ef9501559b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4300
      • C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
        "C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2720
        • C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
          "C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4840

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

    a1d955617a4d146e70544d0d9a0390ca

    SHA1

    5ffdc4453b23e24a7cb0e634b26864c169f5257b

    SHA256

    8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3

    SHA512

    0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810

  • 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

    beaaa35e3efc28e1e2095491eed6c4f2

    SHA1

    da0106b518257b0fee1af489fb3274d71bd7268a

    SHA256

    2c01f986d15b03283c2a19198d736155d6ad1ff22c8edfb88d1fb76742aa7507

    SHA512

    5d63de2cf83c421830f1bcbb1d11696a696fdfc8eca54a51941097e48da6cbd823e5bf9c3f63074698afaec913fac284c665f8d63f05eed740876c4b800b3174

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

    Filesize

    392B

    MD5

    a6ffbab822d6f4eff7d1ff98af31c3e0

    SHA1

    7bfe6d56f1e98a44ce5285c0526365eb0f3e9b54

    SHA256

    5ed08c765ec3bb2324fd93a60cd48bc4dd79e52299a5a1325d2e83a01d221ebd

    SHA512

    9a266413b6fbee770e0c34052acdbe2bf8e930b53994f3fc05251aaba7f26d3162f7787488510db419c0f7c44d2819050c0eb2ef087664c958cd85d458d43e9c

  • C:\Users\Admin\AppData\Local\811d6e58-b508-4e84-bede-57ef9501559b\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe

    Filesize

    709KB

    MD5

    a8a057d904ff939a2e74bc340391122e

    SHA1

    2f1c5113abda6750f790d1338b15232259b6a85c

    SHA256

    d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458

    SHA512

    bf7fe893d919d454202c7e4f4ac618af616c22db6938175466bd2b0251e9f2fff7f4b9b205e6ee9a28200faba4ad8194f13c82600b41f7225575913121aedd0e

  • memory/2352-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2352-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2352-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2352-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2352-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3592-2-0x00000000040A0000-0x00000000041BB000-memory.dmp

    Filesize

    1.1MB

  • memory/3592-1-0x0000000002660000-0x00000000026F7000-memory.dmp

    Filesize

    604KB

  • memory/4840-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4840-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4840-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4840-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4840-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4840-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4840-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4840-38-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4840-39-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB