Analysis

  • max time kernel
    143s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09/04/2024, 05:47

General

  • Target

    f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe

  • Size

    771KB

  • MD5

    1be477c579869b30cd8f9ec09e2611b3

  • SHA1

    897d59324c868c1d194dd0107212d119b15aa76a

  • SHA256

    f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56

  • SHA512

    23236d3b8f3452155496e9097aad21c9b9f9c06a1379a1cb819445d265b21a1cb2f859f5672c6e3e57e7ac7fef6b0ab25271e47202582b2f3c43a39d27e6c4df

  • SSDEEP

    12288:r+c8FbuiWKbuolBBIxEon4AdBCYg1CONb/2k04NrQwLJw9JM1y4V7vlci7i:sWKbLBoEon4AuCOti7SJOCy4dvlde

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.

  • 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\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
    "C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:800
    • C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
      "C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4252
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\4ee7e203-58d4-411e-9b85-aad544db5358" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1492
      • C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
        "C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3480
        • C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
          "C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2712

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

          580071ebd24cccfd9268e1474bb8134e

          SHA1

          443665efe7009fe1d4c5bc4786dc9cc540e59ef6

          SHA256

          53e3fd53196b53d23b724612cf2704518edf3e979dca02f5674ac419b5f7b461

          SHA512

          13d52455d8a30a0af06c420cd01f13f55efc4c55b59883c5208bf4929352e7b783557bff6a157c4fc71a8e7cbfadf00d55eef8ebef4b984624d8feb116a960a4

        • 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

          ae205a1749bdb7b70656d9abeebe7952

          SHA1

          7cb36d8093083a4926dffcee8d48f0e15e4336a9

          SHA256

          28ec58d780a3eb481bb0bb08b8f6590e65c42221ff365ca10e087f1fd88e5813

          SHA512

          3a85e4468bc7c9b8992cb9d555ea58bbf5d041653e3ca0dd489261c4ac0b6c437a7438a47871fe20c6dab6d6f5088b558677de38f4f4d571384b2becdbc88e8b

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

          Filesize

          392B

          MD5

          0c35495e9b6093a61964e508204036fd

          SHA1

          d80f999f6854b291112fd23b124ac87aedc84004

          SHA256

          de425888e45e9ef9291093533a06b69d9aec7405b7cb8e0a6a91a2cf9800f664

          SHA512

          97fb05f3420dc026f0d96f2753ea389670e5097050b7f1b96b17c71915462f3210671baa9c968c0c961127031e331b30ed85fb24d8bfd745d903ac17c1606e30

        • C:\Users\Admin\AppData\Local\4ee7e203-58d4-411e-9b85-aad544db5358\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe

          Filesize

          771KB

          MD5

          1be477c579869b30cd8f9ec09e2611b3

          SHA1

          897d59324c868c1d194dd0107212d119b15aa76a

          SHA256

          f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56

          SHA512

          23236d3b8f3452155496e9097aad21c9b9f9c06a1379a1cb819445d265b21a1cb2f859f5672c6e3e57e7ac7fef6b0ab25271e47202582b2f3c43a39d27e6c4df

        • memory/800-2-0x0000000004CC0000-0x0000000004DDB000-memory.dmp

          Filesize

          1.1MB

        • memory/800-1-0x0000000004C10000-0x0000000004CB2000-memory.dmp

          Filesize

          648KB

        • memory/2712-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-39-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-30-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2712-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3480-20-0x0000000004960000-0x00000000049FB000-memory.dmp

          Filesize

          620KB

        • memory/4252-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4252-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4252-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4252-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4252-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB