Analysis

  • max time kernel
    131s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/04/2024, 21:24

General

  • Target

    5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe

  • Size

    819KB

  • MD5

    3d18b4d0c8a37c764f5d1258c346988f

  • SHA1

    406d89e9ada014fc30999b0e68ecffc3efb6c5a1

  • SHA256

    5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3

  • SHA512

    59b4d499cf80ab003f7fdb699dc0ccb26cd85676557f8e68172fd7381d36f66e5ab85a930eafa37e13e20298faf039e462f2385570aac810762b3e6cb93fd4c5

  • SSDEEP

    12288:morokz513ZjLAdZbWR8kuG0ooPGEhSJSn2KZsY2UEQDsyJKnlSzIoNrVksnZUnqO:moHZ46R8kuVo2L0JSnTyPyNZzZkqO

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 9 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 2 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).

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe
    "C:\Users\Admin\AppData\Local\Temp\5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4432
    • C:\Users\Admin\AppData\Local\Temp\5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe
      "C:\Users\Admin\AppData\Local\Temp\5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4424
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\3ca97f8a-28c1-4b94-82ba-985358f5446d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2356
      • C:\Users\Admin\AppData\Local\Temp\5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe
        "C:\Users\Admin\AppData\Local\Temp\5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2096
        • C:\Users\Admin\AppData\Local\Temp\5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe
          "C:\Users\Admin\AppData\Local\Temp\5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
            PID:4224
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4224 -s 568
              5⤵
              • Program crash
              PID:3016
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4224 -ip 4224
      1⤵
        PID:3188
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4120,i,7064649017625232947,17746804975634116675,262144 --variations-seed-version --mojo-platform-channel-handle=3836 /prefetch:8
        1⤵
          PID:4712

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\3ca97f8a-28c1-4b94-82ba-985358f5446d\5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3.exe

          Filesize

          819KB

          MD5

          3d18b4d0c8a37c764f5d1258c346988f

          SHA1

          406d89e9ada014fc30999b0e68ecffc3efb6c5a1

          SHA256

          5d1e47acd2d476363bb2d47fc805e72d1636bbdaf3d2d9d90559a725add863e3

          SHA512

          59b4d499cf80ab003f7fdb699dc0ccb26cd85676557f8e68172fd7381d36f66e5ab85a930eafa37e13e20298faf039e462f2385570aac810762b3e6cb93fd4c5

        • memory/2096-22-0x00000000049B0000-0x0000000004A4E000-memory.dmp

          Filesize

          632KB

        • memory/4224-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4224-25-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4224-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4424-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4424-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4424-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4424-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4424-19-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4432-1-0x0000000002F50000-0x0000000002FF0000-memory.dmp

          Filesize

          640KB

        • memory/4432-2-0x0000000004AB0000-0x0000000004BCB000-memory.dmp

          Filesize

          1.1MB