Analysis

  • max time kernel
    162s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01-02-2022 01:34

General

  • Target

    20807e0f8171807c8f0c443df26ea852c7bfb4988d37e7874615cc840573cc9d.exe

  • Size

    80KB

  • MD5

    5cf25a50ae26c6c97a6ecd0e27b41541

  • SHA1

    6e8d04cb4665ff7ad04d92e21d6b1791798639ac

  • SHA256

    20807e0f8171807c8f0c443df26ea852c7bfb4988d37e7874615cc840573cc9d

  • SHA512

    26758d1496a8ec616d9a490d839baeb4fd61ae1bfabf923c83f8bce1165e29449cbaaa2504b32bb6b68066c9b39eb7374c6ec09846770681d4b2f7738737a637

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\Search\Data\Applications\Windows\Projects\SystemIndex\Indexer\CiFiles\0AD26D-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .0ad26d -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_0ad26d: z4UmJVtVhJsj1O7TlVIdZkimRLbeWcvHB5Io1MfNKJhgrFg7wW QSVR16RHm2GiQ0PCP1y14LFFpZYZhPdHPsCvSulY+3kYJZ65Yy ixr8+VEHizmYj2iq2vM8g5iE40sRNw+GS771fHTCBTlp67DfjV 5CLWrypjpumcgK7QWMTrqUFa8rY+rg6Z0IAiTWI5CtTUIgFLx7 MgaGotG2+kWSM0dfFcGfC0JZlcZlucQtRbzr5jM+3FJeb2qSjs jEckrPUOcU81yyVk/FBeQSli27sUH0JMzChdR+Xg==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies extensions of user files 1 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\20807e0f8171807c8f0c443df26ea852c7bfb4988d37e7874615cc840573cc9d.exe
    "C:\Users\Admin\AppData\Local\Temp\20807e0f8171807c8f0c443df26ea852c7bfb4988d37e7874615cc840573cc9d.exe"
    1⤵
    • Modifies extensions of user files
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1700
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:520
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:7564

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1700-55-0x00000000758A1000-0x00000000758A3000-memory.dmp

    Filesize

    8KB