Analysis

  • max time kernel
    143s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-05-2024 12:59

General

  • Target

    7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe

  • Size

    708KB

  • MD5

    2bf0bdb1df4b48c79f1025be56129f5c

  • SHA1

    ac09221c18bd9a10347c90b4778995d11639dc72

  • SHA256

    7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473

  • SHA512

    3bae13941eb2614351af6f68e7f4b80e9f69401c678de666c1115ba7714ddbacff5eb4b379ff196d20ddc6ad2b53cfc3bed7fc28fa7d57b5cd3221660d50dd71

  • SSDEEP

    12288:nYYRITq/ev0TZQBgWSKdeaR/QshrK0Neqbr0kNpJ2+PIiLjlz:nPR3ev0KNBYspfeQgkNKcbL5

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes
  • extension

    .vehu

  • 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: 0872PsawqS

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\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe
    "C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3412
    • C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe
      "C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3544
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\4c0441e4-00c5-45de-a0ca-54a30571c14c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3492
      • C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe
        "C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4044
        • C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe
          "C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1108

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

    df80f9ba75076db634761b6132e0d4e3

    SHA1

    07983946fb660752c7cccb2ef82d01ec4c9ecc5d

    SHA256

    d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99

    SHA512

    4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a

  • 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

    5ee5c55b4c2646d3d2facb71dba94667

    SHA1

    0d98b11363dca1d047670a86255b68274a664e3b

    SHA256

    39870a4e82775b3e1dd717dd816bf16d08132311fc5142c01b54f5bf20b80482

    SHA512

    0272d5f0a8af7e17ccc8428ea0068f585a4cbf9a171f57be612c1be50ab672f21ef9e720dde7b39efa0d1969b2c00eaadb06d1e211acdcc0409b5256aafd6d3b

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

    Filesize

    392B

    MD5

    7067c29cbe54fc716cf3b1f07ae78370

    SHA1

    7a734bce1085a34f1b5ffa3315eefa8f7baa5b7e

    SHA256

    cfa23be393c5761b8e353b47afe97c4fab92462247d7e855f6db4db51ab5b65f

    SHA512

    d49c6418e9e4571dee6e95ae7917c31b7ae8c76c7f9f339b7722e94df2bb484135f31891ff5b3354da20068fed4c24a6de43459b8b45d6594edd4a9a0eb66a39

  • C:\Users\Admin\AppData\Local\4c0441e4-00c5-45de-a0ca-54a30571c14c\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe

    Filesize

    708KB

    MD5

    2bf0bdb1df4b48c79f1025be56129f5c

    SHA1

    ac09221c18bd9a10347c90b4778995d11639dc72

    SHA256

    7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473

    SHA512

    3bae13941eb2614351af6f68e7f4b80e9f69401c678de666c1115ba7714ddbacff5eb4b379ff196d20ddc6ad2b53cfc3bed7fc28fa7d57b5cd3221660d50dd71

  • memory/1108-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1108-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1108-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1108-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1108-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1108-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1108-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1108-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1108-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3412-1-0x0000000004160000-0x0000000004200000-memory.dmp

    Filesize

    640KB

  • memory/3412-4-0x0000000004320000-0x000000000443B000-memory.dmp

    Filesize

    1.1MB

  • memory/3544-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3544-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3544-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3544-2-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3544-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB