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Analysis

  • max time kernel
    142s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    26/04/2024, 05:00

General

  • Target

    589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe

  • Size

    760KB

  • MD5

    b15ef523248fef029925a13e734f0d6a

  • SHA1

    d10b5c36d35a5b1f381a75c9f70e4e54e13a9adb

  • SHA256

    589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd

  • SHA512

    7444089d471faabc7252497eca92116ffa16a7bf863f44f24efda386f43fdab91361ddcb0f8dacf28cd697d70c08e68ebe062b68f066991f0c07e20c43c8da7a

  • SSDEEP

    12288:VXTQb18sh8zXGklrAtTuMdp0ttYKHypYHy9EbRc0YQkQCA+taC+Y6JbOp5soSyB4:Vy8sh8zXVlrQTukIY930go+ECLp5soSH

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes
  • extension

    .bgjs

  • offline_id

    Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1

  • 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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 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\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe
    "C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4884
    • C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe
      "C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4760
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\4c089b8a-2ed0-4708-bf54-8a1b8deea7f9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3524
      • C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe
        "C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3904
        • C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe
          "C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2480

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

    26f403621df973e369b7b13c6aba9ccb

    SHA1

    ca3e85e908d9532f384c0560797f4e379bd4a0a0

    SHA256

    0e9d6e111822d17e4c57df845d4fdacc5477adec069db8eecd3be0d11fc84533

    SHA512

    d5bfab31e8c913cd97b83d92c56e58a3c225975537006b42124cb1cf4e813c635c30d6aa5010ecec54c1e8fa9eeb44c93f2b955216e7509dd79f1e074e340225

  • 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

    50c055f07195b37b5e0cde7742a3e79f

    SHA1

    cda7cd037851075bc004f3ad6ad6008f7419a08c

    SHA256

    2ebfdccc1ba9d3f2fbf2055f6ab245e776b2c99d72ee4d672175ba1e64d30e5e

    SHA512

    63ababe2cfdc4612e115c97f47df1ea600e050baffd2c21e31cd19f206d38e3fb5c2c56edcf5cd74346756747e3783f8f53da500d25a4ad3ef7fd349a78622b3

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

    Filesize

    392B

    MD5

    de639dc9313a6992c5f7daaba479998c

    SHA1

    adeff986ee38ffd311845ff2f09a46216f9b3496

    SHA256

    142c52c4da8179a686db1aa72bbff96554ba50c876b6c73e72533fd0ecd13cb4

    SHA512

    99498a42ebfef850cc8670dc7d8150361871ac6b23d506349c5b3771ddb7147f0580b9004dbb9e1c857e2c82058add494ad34ced17a68ecc631fc33e31f18cbc

  • C:\Users\Admin\AppData\Local\4c089b8a-2ed0-4708-bf54-8a1b8deea7f9\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe

    Filesize

    760KB

    MD5

    b15ef523248fef029925a13e734f0d6a

    SHA1

    d10b5c36d35a5b1f381a75c9f70e4e54e13a9adb

    SHA256

    589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd

    SHA512

    7444089d471faabc7252497eca92116ffa16a7bf863f44f24efda386f43fdab91361ddcb0f8dacf28cd697d70c08e68ebe062b68f066991f0c07e20c43c8da7a

  • memory/2480-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-39-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-38-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-23-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-24-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2480-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3904-20-0x00000000043D0000-0x0000000004465000-memory.dmp

    Filesize

    596KB

  • memory/4760-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4760-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4760-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4760-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4760-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4884-2-0x0000000005F90000-0x00000000060AB000-memory.dmp

    Filesize

    1.1MB

  • memory/4884-1-0x00000000043C0000-0x000000000445D000-memory.dmp

    Filesize

    628KB