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Resubmissions

24/08/2023, 19:20

230824-x13e3sgg3y 10

24/08/2023, 19:16

230824-xy6pqagg21 10

Analysis

  • max time kernel
    127s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/08/2023, 19:16

General

  • Target

    841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe

  • Size

    762KB

  • MD5

    2e1c250639a956a9790f28e8208de685

  • SHA1

    cc7d4e2d6a74b2431b6e53b876f055367d2737f0

  • SHA256

    841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87

  • SHA512

    3ffed2880b73215d53e5f09bf8b277e47dd9e677bde5c8861b7a23c080b5fca5903303f87c75d1de446ddc4f407a00ac994c95745ed774d2d8fab4f0d04ad7d6

  • SSDEEP

    12288:ZxbDQE4JyP20DdHEiJJY8mqgdMBQF7wlw3LQCnweAlcuac5hKgkalGlB:ZNQ1o20DtrYyex6uuBkPb

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .wzqw

  • offline_id

    pGPY4MKNHaEeN9pLKNW37rI0mblzUZFtPsjZ8Ht1

  • 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-E3ktviSmlG 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: 0765zSjfr

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 9 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • 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\841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe
    "C:\Users\Admin\AppData\Local\Temp\841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2596
    • C:\Users\Admin\AppData\Local\Temp\841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe
      "C:\Users\Admin\AppData\Local\Temp\841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:840
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\0248591c-6c31-4add-970e-90dbd14d3e0a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3752
      • C:\Users\Admin\AppData\Local\Temp\841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe
        "C:\Users\Admin\AppData\Local\Temp\841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4864
        • C:\Users\Admin\AppData\Local\Temp\841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe
          "C:\Users\Admin\AppData\Local\Temp\841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
            PID:4740
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4740 -s 568
              5⤵
              • Program crash
              PID:1292
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4740 -ip 4740
      1⤵
        PID:2260

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\0248591c-6c31-4add-970e-90dbd14d3e0a\841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87.exe

        Filesize

        762KB

        MD5

        2e1c250639a956a9790f28e8208de685

        SHA1

        cc7d4e2d6a74b2431b6e53b876f055367d2737f0

        SHA256

        841b3295de24b0586adad6161f7a4249809cb0efc4542334c819dcad2a2a1b87

        SHA512

        3ffed2880b73215d53e5f09bf8b277e47dd9e677bde5c8861b7a23c080b5fca5903303f87c75d1de446ddc4f407a00ac994c95745ed774d2d8fab4f0d04ad7d6

      • memory/840-3-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/840-4-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/840-5-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/840-6-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/840-17-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/2596-1-0x0000000003FA0000-0x0000000004039000-memory.dmp

        Filesize

        612KB

      • memory/2596-2-0x0000000004040000-0x000000000415B000-memory.dmp

        Filesize

        1.1MB

      • memory/4740-22-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4740-23-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4740-25-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4864-20-0x00000000024D0000-0x000000000256D000-memory.dmp

        Filesize

        628KB