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Analysis

  • max time kernel
    139s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/10/2023, 03:30

General

  • Target

    b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe

  • Size

    809KB

  • MD5

    0c2114f292da69f8b82e78a1a8441649

  • SHA1

    908a6fd97369255fa3fca0fede95e0a985cce375

  • SHA256

    b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502

  • SHA512

    bad5cb1ae71dee29e22729e06eb2293a8b92093b7fbcdf41813427a638b816b4394afa4ad1a69e3c7ee97d153473f5dbe68f78be6fe8037180c8ca55a72e5fb2

  • SSDEEP

    12288:eMb3r6sp6A3X39nZgbsPt3hb/QusXDNE8M/hlMbH3JfkLd052ksYT:eMbu4H39nZg4FRbnszNE868RkOr

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .ooza

  • offline_id

    dhL6XvokZotUzL67Na5WfNIBufODsob7eYc3mzt1

  • 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-XA1LckrLRP 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: 0785Okhu

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\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe
    "C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe
      "C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2004
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\af21e22b-3197-4714-9004-b8b5647f7841" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3488
      • C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe
        "C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:5084
        • C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe
          "C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
            PID:4308
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4308 -s 568
              5⤵
              • Program crash
              PID:3080
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4308 -ip 4308
      1⤵
        PID:1808

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\af21e22b-3197-4714-9004-b8b5647f7841\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe

        Filesize

        809KB

        MD5

        0c2114f292da69f8b82e78a1a8441649

        SHA1

        908a6fd97369255fa3fca0fede95e0a985cce375

        SHA256

        b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502

        SHA512

        bad5cb1ae71dee29e22729e06eb2293a8b92093b7fbcdf41813427a638b816b4394afa4ad1a69e3c7ee97d153473f5dbe68f78be6fe8037180c8ca55a72e5fb2

      • memory/2004-3-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/2004-4-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/2004-5-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/2004-6-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/2004-15-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/2020-1-0x0000000003FB0000-0x0000000004046000-memory.dmp

        Filesize

        600KB

      • memory/2020-2-0x0000000004110000-0x000000000422B000-memory.dmp

        Filesize

        1.1MB

      • memory/4308-20-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4308-21-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4308-23-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/5084-18-0x0000000003F60000-0x0000000004001000-memory.dmp

        Filesize

        644KB