Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-04-2024 06:21

General

  • Target

    8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

  • Size

    779KB

  • MD5

    b35348f4654893767a081b076f7becdf

  • SHA1

    05b4ff88303a5e72ff43d5554c4628cec9e71bf8

  • SHA256

    8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

  • SHA512

    b634797706b5851ade5983aeac47f63723545e2d2c09f171871728a278f7cb72ab52d4eca73ff6648d6224a7c4da2ec261b4c6104fa2ab532334ddd5551b8e67

  • SSDEEP

    12288:JHdymkH6+JdxrhhdF3wHogECWip4QBeXYeNaCA57tQL9ODxvZTTN85vaYkqC:JdkaCfrhhP3wi7rXYeNbaekDxRfO5zC

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .bgjs

  • offline_id

    Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1

  • 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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: support@freshingmail.top Reserve e-mail address to contact us: datarestorehelpyou@airmail.cc Your personal ID: 0863PsawqS

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\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
    "C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2740
    • C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
      "C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4428
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\deb4c570-b54f-4def-a814-430a8d3b16f9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:868
      • C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
        "C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2692
        • C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
          "C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
            PID:244
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 244 -s 576
              5⤵
              • Program crash
              PID:968
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 244 -ip 244
      1⤵
        PID:2216

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Persistence

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Privilege Escalation

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Defense Evasion

      File and Directory Permissions Modification

      1
      T1222

      Modify Registry

      1
      T1112

      Discovery

      Query Registry

      1
      T1012

      System Information Discovery

      2
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\deb4c570-b54f-4def-a814-430a8d3b16f9\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
        Filesize

        779KB

        MD5

        b35348f4654893767a081b076f7becdf

        SHA1

        05b4ff88303a5e72ff43d5554c4628cec9e71bf8

        SHA256

        8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

        SHA512

        b634797706b5851ade5983aeac47f63723545e2d2c09f171871728a278f7cb72ab52d4eca73ff6648d6224a7c4da2ec261b4c6104fa2ab532334ddd5551b8e67

      • memory/244-20-0x0000000000400000-0x0000000000537000-memory.dmp
        Filesize

        1.2MB

      • memory/244-21-0x0000000000400000-0x0000000000537000-memory.dmp
        Filesize

        1.2MB

      • memory/244-23-0x0000000000400000-0x0000000000537000-memory.dmp
        Filesize

        1.2MB

      • memory/2692-18-0x0000000004410000-0x00000000044B0000-memory.dmp
        Filesize

        640KB

      • memory/2740-1-0x00000000046D0000-0x0000000004762000-memory.dmp
        Filesize

        584KB

      • memory/2740-2-0x0000000005F10000-0x000000000602B000-memory.dmp
        Filesize

        1.1MB

      • memory/4428-3-0x0000000000400000-0x0000000000537000-memory.dmp
        Filesize

        1.2MB

      • memory/4428-4-0x0000000000400000-0x0000000000537000-memory.dmp
        Filesize

        1.2MB

      • memory/4428-5-0x0000000000400000-0x0000000000537000-memory.dmp
        Filesize

        1.2MB

      • memory/4428-6-0x0000000000400000-0x0000000000537000-memory.dmp
        Filesize

        1.2MB

      • memory/4428-15-0x0000000000400000-0x0000000000537000-memory.dmp
        Filesize

        1.2MB