Overview

overview

10

Static

static

4f7bdda79e...60.exe

windows7_x64

10

4f7bdda79e...60.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    134s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    23-05-2022 18:43

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General

  • Target

    4f7bdda79e389d6660fca8e2a90a175307a7f615fa7673b10ee820d9300b5c60.exe

  • Size

    65KB

  • MD5

    eaef25ab1f59492ffc735a386294b69f

  • SHA1

    76cc795c39cc19465c24825dc5ebafd7f944ea7e

  • SHA256

    4f7bdda79e389d6660fca8e2a90a175307a7f615fa7673b10ee820d9300b5c60

  • SHA512

    a812186ff05baa0c194abc2b4becc145f312b885068773f994658ecac2bfd8e1c85acdfe3774728541ed966f46a872d19fee17a53cc07f3f8e2e94be0cdef1c4

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\User Account Pictures\0A3334-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .0a3334 -- 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. Additionally, you must know that your sensitive data has been stolen by our analyst experts and if you choose to no cooperate with us, you are exposing yourself to huge penalties with lawsuits and government if we both don't find an agreement. We have seen it before; cases with multi million costs in fines and lawsuits, not to mention the company reputation and loosing clients trust and the medias calling non-stop for answers. Come chat with us and you could be surprised on how fast we both can find an agreement without getting this incident public. -- 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_0a3334: Tc6gtxx8+UIIj7zaYuIKa3V9Ww+2dMpZnc22bKk9M8+ylQBVNw UFDIMctpDOR2iM/WB+g1xs+OU+Tepv2+E1MXE1RE4N/soBurP5 yy00Mwpf1axvqEs2BcxUk4iyJ6zVl93MFmyZd0elicSHsEylrg SS7Ip7kAuLiZs8PjVS2eK5gQ0KupN4ub/BUMjXpvkl0Pb0Ievm yXAzRtMcwaPrMn7zMwXrS0iJP3WCvltaINCUdQudzcDdgbJdw7 saPYqXCf8NZEfgP8WwEtt997NVd70maNd13ck3Yg==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Modifies extensions of user files 4 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Drops file in Program Files directory 64 IoCs
  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4f7bdda79e389d6660fca8e2a90a175307a7f615fa7673b10ee820d9300b5c60.exe
    "C:\Users\Admin\AppData\Local\Temp\4f7bdda79e389d6660fca8e2a90a175307a7f615fa7673b10ee820d9300b5c60.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:388
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\0A3334-Readme.txt"
      2⤵
        PID:2128
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c "C:\Users\Admin\AppData\Local\Temp\FB31.tmp.bat"
        2⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:3996
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 388
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:3556

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Privilege Escalation

    Defense Evasion

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    Lateral Movement

    Collection

    Data from Local System

    1
    T1005

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\FB31.tmp.bat
      Filesize

      140B

      MD5

      e1d7b77c03422c099e7511f16b380dfa

      SHA1

      fd15265f1f3fd91b0526d4d0f99cb32d7b6875a2

      SHA256

      41dbe694f56f0cfa45a8b5bb2aa5eb5e3f7a9f70114d5724b8ae92c64a17fe24

      SHA512

      fdf169ee7e6a04f2b88353abeb8c141aff9683b34ab25a1648c9e0fb53b24910a897c3d58ebad06624b8394918a1d3934a9edc077e1de9857d0d9a0d382afa56

      Download Submit
    • C:\Users\Admin\Desktop\0A3334-Readme.txt
      Filesize

      2KB

      MD5

      966667337371b7c3ea152e25698d7247

      SHA1

      2508830594fc048f67b6645b723d9c046c168585

      SHA256

      e9e8b6711a66faf83051d05e4f5f7bd4fc6946cd7adfe9664fa76c8af2707c3c

      SHA512

      a4b3b41582b14a415081b60461f999f9acb70764c014b13dae16ff3d0aa35fd3ff9ac3af8e6c6cb735841e23ae440676d4cdc8bfbb57c9007cbe6f444d7a0005

      Download Submit
    • memory/388-54-0x0000000076C81000-0x0000000076C83000-memory.dmp
      Filesize

      8KB

      Download
    • memory/388-55-0x0000000008930000-0x00000000089AD000-memory.dmp
      Filesize

      500KB

      Download
    • memory/2128-56-0x0000000000000000-mapping.dmp
      Download
    • memory/3556-61-0x0000000000000000-mapping.dmp
      Download
    • memory/3996-58-0x0000000000000000-mapping.dmp
      Download