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Analysis

  • max time kernel
    141s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231020-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/10/2023, 20:00

General

  • Target

    18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe

  • Size

    744KB

  • MD5

    e8a6862182b58ef511dd4df313ec615f

  • SHA1

    4eda4c23199853a52b75d371661a16295893538e

  • SHA256

    18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0

  • SHA512

    0b86cf445c39b5c192affa6b5de4fa72db640f35450b5096f5c16dfa5f6c7c5ab6c705db6cc6f195f563ce73b65339c2889640956ae04d9b314e7e606435e5f4

  • SSDEEP

    12288:JCwQ/y/heWvm5JJXhaHC+/5Kht0JGqudDafejZrvXYC0j91Hjjpd3y:J1b/heWvmRhaHDRKz0JjsDnpI7jNFy

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .ppvs

  • offline_id

    phJtdHo970vyx7vwlYG00OakDR75RuJz7NXDArt1

  • payload_url

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

    http://zexeq.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. You can get and look video overview decrypt tool: https://we.tl/t-eyUsqpKbFl Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0815JOsie

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\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
    "C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4052
    • C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
      "C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5084
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\54dbd4bb-0dd1-46eb-bb4f-ceadf2a5a33b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4204
      • C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
        "C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4444
        • C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
          "C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
            PID:1700
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 1700 -s 216
              5⤵
              • Program crash
              PID:3696
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1700 -ip 1700
      1⤵
        PID:3080

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\54dbd4bb-0dd1-46eb-bb4f-ceadf2a5a33b\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe

        Filesize

        744KB

        MD5

        e8a6862182b58ef511dd4df313ec615f

        SHA1

        4eda4c23199853a52b75d371661a16295893538e

        SHA256

        18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0

        SHA512

        0b86cf445c39b5c192affa6b5de4fa72db640f35450b5096f5c16dfa5f6c7c5ab6c705db6cc6f195f563ce73b65339c2889640956ae04d9b314e7e606435e5f4

      • memory/1700-20-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/1700-21-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/1700-23-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4052-1-0x0000000002600000-0x0000000002697000-memory.dmp

        Filesize

        604KB

      • memory/4052-2-0x0000000002790000-0x00000000028AB000-memory.dmp

        Filesize

        1.1MB

      • memory/4444-18-0x0000000002420000-0x00000000024BC000-memory.dmp

        Filesize

        624KB

      • memory/5084-3-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/5084-4-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/5084-5-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/5084-6-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/5084-15-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB