Analysis

  • max time kernel
    141s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 04:41

General

  • Target

    c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe

  • Size

    783KB

  • MD5

    5fbc11643953158e26571772a8edc74a

  • SHA1

    94fedc97feb2d2df2745c6fcd5501a1a114a0d75

  • SHA256

    c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166

  • SHA512

    6b7f54e3a520aea87838d0b1185504b20d265ff53e7e4a7c8177f4da660fd308aab220489b0a833b41cb76d3b637834ed3a987265aee56251dfc3f6d3fb4a988

  • SSDEEP

    12288:8oIZKVz6wlKt08bkEeQvl0huevWm5A/oKwUaRKI4Aq66k17rp/Bl00iG6+G:F2Khc0CyT55A/oKva8I4G6kDZi

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\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
    "C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3896
    • C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
      "C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4020
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\fe7f5bbf-5988-447d-a7ea-6487b7b4efb1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3984
      • C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
        "C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1232
        • C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
          "C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4136

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

    cb35bd9d6c5a4fd50a9263018bbd9784

    SHA1

    efec24f93d2af7bd01969c36870ebc928fa6c790

    SHA256

    be648ee93df285417e494e28c01e3ab8f3d043845f4d3b397dfd137d187ed612

    SHA512

    ac26182fb167458da4b465b118720470859e8028db8d3d71ddbe0c5be0e46b9178c5f7ccb8b1252c38754e27da1af546f8d2f6e32e1bfcbeac0d510aa831bf11

  • 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

    531039475b8e1ce89504b3b255528146

    SHA1

    85ce619f07fea4a403d3eda9637ec2a44f035d87

    SHA256

    c046a73a2d1459f0f44c7a7abc78b375d497c56d2ac567fc7c08bf5240851d8b

    SHA512

    9dd0df91f6508468e530431ed9851e506ec1aeb157a87fac56376c74ce4fba13c8f9b2c986b4fb6042dbab74f34a83ef570fb30e072d0ed64541a60ae7e22cb0

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

    Filesize

    392B

    MD5

    e737f752779b7dd3ef534920a0625919

    SHA1

    665fad5cc4fefbfa4b4b273b986bb45b272d1f04

    SHA256

    9b82a61fd764a96063beebe2bc4317d97939ee3b62dd9d97dbc1b7b4d159cabf

    SHA512

    d676e4011e32ab1e34acf670eacd5546ddf7efb5e80fd2b894ad305559715eb7764e681c4ca3981ed61df917300a6fca2c62e70b860b3629d25cc47f12a2fed0

  • C:\Users\Admin\AppData\Local\fe7f5bbf-5988-447d-a7ea-6487b7b4efb1\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe

    Filesize

    783KB

    MD5

    5fbc11643953158e26571772a8edc74a

    SHA1

    94fedc97feb2d2df2745c6fcd5501a1a114a0d75

    SHA256

    c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166

    SHA512

    6b7f54e3a520aea87838d0b1185504b20d265ff53e7e4a7c8177f4da660fd308aab220489b0a833b41cb76d3b637834ed3a987265aee56251dfc3f6d3fb4a988

  • memory/3896-2-0x00000000040B0000-0x00000000041CB000-memory.dmp

    Filesize

    1.1MB

  • memory/3896-1-0x00000000024E0000-0x0000000002577000-memory.dmp

    Filesize

    604KB

  • memory/4020-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4020-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4020-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4020-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4020-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB