Analysis

  • max time kernel
    303s
  • max time network
    369s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/03/2023, 15:39

General

  • Target

    f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe

  • Size

    702KB

  • MD5

    e5a01ac0fdc56bedef4e05c92a6d0f18

  • SHA1

    59717771b834d04bf8b90112623b15774b69549d

  • SHA256

    f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c

  • SHA512

    d0ee6acff372030d7484af8445ad21613c4d42fee69c1dfc1d0fa9dcfea31fef2d7c757b46823f32f658d5eebb5c95c8015dc8a967b9a048413fbb493e2b4034

  • SSDEEP

    12288:xk1AVJcXNVKGEniSGDXk9AkdzvJDIsFH3JdXEB9qSBerPKXPeQ:42c9v4iSikfTDIIZd0B9qJPKXPf

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .jycx

  • offline_id

    MEMHlobHgXqvmTWaMsLcwGZhDOd00bblO1yevst1

  • payload_url

    http://uaery.top/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-fkW8qLaCVQ 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: 0674JOsie

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 7 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 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe
    "C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:324
    • C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe
      "C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2496
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\89734b94-1474-48f1-b839-966ca176633e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3912
      • C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe
        "C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
          PID:1672

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\89734b94-1474-48f1-b839-966ca176633e\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe

            Filesize

            702KB

            MD5

            e5a01ac0fdc56bedef4e05c92a6d0f18

            SHA1

            59717771b834d04bf8b90112623b15774b69549d

            SHA256

            f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c

            SHA512

            d0ee6acff372030d7484af8445ad21613c4d42fee69c1dfc1d0fa9dcfea31fef2d7c757b46823f32f658d5eebb5c95c8015dc8a967b9a048413fbb493e2b4034

          • memory/324-136-0x0000000002740000-0x000000000285B000-memory.dmp

            Filesize

            1.1MB

          • memory/2496-134-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2496-135-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2496-137-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2496-140-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2496-154-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2496-157-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB