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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/04/2024, 21:35

General

  • Target

    f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe

  • Size

    745KB

  • MD5

    db45443586d5e4d78ce547cc809af356

  • SHA1

    8e360a89ddf44358876b60ff17e20c2375ba2f80

  • SHA256

    f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b

  • SHA512

    687b3b033370ba9becf095e1dc5aeccc2db745a84f7b3ececdb463e65856caa0dd0158d722144f6a605027bfeb44f52cb12e3f593282926046aee387a52f1c55

  • SSDEEP

    12288:0dlg0H/qp2xYQZNONtuoBLP66Ff59lhP30GSBNRmVUZzmhhUGcbvv:0deAqpG5OT/FFhMRMVUihhUx7

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .uajs

  • offline_id

    Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1

  • payload_url

    http://sdfjhuz.com/dl/build2.exe

    http://sajdfue.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/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 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: 0859PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 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\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe
    "C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2572
    • C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe
      "C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3764
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\73fb1565-7e91-4ae6-b972-d3bdf793871c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2224
      • C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe
        "C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1128
        • C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe
          "C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2164

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

    38fe440dcb41bf01baa39153169a3d74

    SHA1

    74a11892ffb1e9baf34fca27ce617993a3221080

    SHA256

    80c40063d4b3729809906924dd55487a4f20c5bc8aeefa8cfc313dc532f7e423

    SHA512

    eaf66971a2b57aa93c9fb3c2d25759174dfb0a90d61f2589aeee59d3c540b5cbd9fb669891616e57b41d66b41b6586c3724d3b02f91a86bb7bd905bf2faac31c

  • 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

    7fced6d76d82044e78e0c08c443079c2

    SHA1

    29c2d428e7d9a56a6bf3d04c8e3af900dbe0158f

    SHA256

    77cb4a7b7f3ca860907393d270a712bfdf10290d24a5f78ab4a916bdc9e5435d

    SHA512

    fc690e3541d4d9aee815227e1363cf0740008279639ff4b7ebd1a63af1826d44f199741107d43082dfb0ce672412cd35d553ae598f8c143664426b51e0033f39

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

    Filesize

    392B

    MD5

    12eb31545ecb648063b59b6fd8d6b498

    SHA1

    c2f2e3eb3fe8a25ecb02132c71ecf21fa5eb6a12

    SHA256

    3efffa605924172d35761fa1725290dfe505e988c37f89bcb93844dc9b44fb6b

    SHA512

    e98e48947f350a54ea9376ed1581458d2e02ce70a88fac7ca2b65708e60f1e4d3ddb64669ed616469f931a47b6a47892b4f90000790197c954d50aa9fa587325

  • C:\Users\Admin\AppData\Local\73fb1565-7e91-4ae6-b972-d3bdf793871c\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe

    Filesize

    745KB

    MD5

    db45443586d5e4d78ce547cc809af356

    SHA1

    8e360a89ddf44358876b60ff17e20c2375ba2f80

    SHA256

    f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b

    SHA512

    687b3b033370ba9becf095e1dc5aeccc2db745a84f7b3ececdb463e65856caa0dd0158d722144f6a605027bfeb44f52cb12e3f593282926046aee387a52f1c55

  • memory/1128-18-0x0000000004700000-0x00000000047A0000-memory.dmp

    Filesize

    640KB

  • memory/2164-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-21-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2164-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2572-2-0x0000000004AD0000-0x0000000004BEB000-memory.dmp

    Filesize

    1.1MB

  • memory/2572-1-0x0000000004940000-0x00000000049D8000-memory.dmp

    Filesize

    608KB

  • memory/3764-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3764-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3764-15-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3764-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3764-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB