Overview

overview

10

Static

static

10

8639825230...le.exe

windows7_x64

10

8639825230...le.exe

windows10_x64

10

Analysis

  • max time kernel
    109s
  • max time network
    138s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    26-07-2021 12:59

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General

  • Target

    8639825230d5504fd8126ed55b2d7aeb72944ffe17e762801aab8d4f8f880160.sample.exe

  • Size

    296KB

  • MD5

    258ed03a6e4d9012f8102c635a5e3dcd

  • SHA1

    a3bc2a30318f9bd2b51cb57e2022996e7f15c69e

  • SHA256

    8639825230d5504fd8126ed55b2d7aeb72944ffe17e762801aab8d4f8f880160

  • SHA512

    967414274cb8d8fdf0e4dd446332b37060d54a726ab77f4ec704a5afe12162e098183add4342d1710db1e1c3b74035a001cf4c2d7790a27bf6d8381c34a96889

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

C:\50C07F-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .50c07f -- 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: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_50c07f: 4/7JW2LFqC7vqbdXrHqqAYMbxFyULfCdsjbzAjFzjjwxqO3zxJ /83PSfHKjP3YUYuE6OUKUSaa+vtAb9rmz1IoIbCQPKVXgH41Zj Ai0z8GnMhMwWcUwFCOwpjGrkX8+OJKj+MVH7cSWBRX/Mn/qyo7 paBp3XbU1jWKbIBch2/TZ/xH+VbVAb39GpUVuZ7Ma8nOdiwcFG +uclrHZLW+xixj3y2JyOZIy6huBGVI+zrxehOvElt5If42aQO0 6ruO4cw+cioJSkZnf4K0D/zh1ih77qgTxaqiPeMQ==}
URLs

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Users\Admin\Downloads\50C07F-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .50c07f -- 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: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_50c07f: 4/7JW2LFqC7vqbdXrHqqAYMbxFyULfCdsjbzAjFzjjwxqO3zxJ /83PSfHKjP3YUYuE6OUKUSaa+vtAb9rmz1IoIbCQPKVXgH41Zj Ai0z8GnMhMwWcUwFCOwpjGrkX8+OJKj+MVH7cSWBRX/Mn/qyo7 paBp3XbU1jWKbIBch2/TZ/xH+VbVAb39GpUVuZ7Ma8nOdiwcFG +uclrHZLW+xixj3y2JyOZIy6huBGVI+zrxehOvElt5If42aQO0 6ruO4cw+cioJSkZnf4K0D/zh1ih77qgTxaqiPeMQ==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .50c07f -- 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: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_50c07f: 4/7JW2LFqC7vqbdXrHqqAYMbxFyULfCdsjbzAjFzjjwxqO3zxJ /83PSfHKjP3YUYuE6OUKUSaa+vtAb9rmz1IoIbCQPKVXgH41Zj Ai0z8GnMhMwWcUwFCOwpjGrkX8+OJKj+MVH7cSWBRX/Mn/qyo7 paBp3XbU1jWKbIBch2/TZ/xH+VbVAb39GpUVuZ7Ma8nOdiwcFG +uclrHZLW+xixj3y2JyOZIy6huBGVI+zrxehOvElt5If42aQO0 6ruO4cw+cioJSkZnf4K0D/zh1ih77qgTxaqiPeMQ==}
URLs

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Detected Netwalker Ransomware 1 IoCs

    Detected unpacked Netwalker executable.

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies extensions of user files 8 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • 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
  • Interacts with shadow copies 2 TTPs 1 IoCs

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

    ransomware
  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8639825230d5504fd8126ed55b2d7aeb72944ffe17e762801aab8d4f8f880160.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\8639825230d5504fd8126ed55b2d7aeb72944ffe17e762801aab8d4f8f880160.sample.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:3260
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:3028
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\50C07F-Readme.txt"
      2⤵
        PID:5552
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\21FB.tmp.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4168
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 3260
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:6672
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4028

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Privilege Escalation

    Defense Evasion

    File Deletion

    2
    T1107

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    Lateral Movement

    Collection

    Data from Local System

    1
    T1005

    Exfiltration

    Command and Control

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\21FB.tmp.bat
      MD5

      c275a4ddb900e03932f1b44640a02cc8

      SHA1

      e95a30bc0e0f492ed10485b46f57b7f95aa50e76

      SHA256

      ad1cc94fd0711396da2f7152207416cc511243d161a34e54d8b769d05923ef6c

      SHA512

      143ca0af3ed4846f9112c957caf6b0c0457a166c7e1335f834b2374974a2d9b106fe59321129031c0712f662c8bad30e3927f184254f423a2810078b58cb0a99

      Download Submit
    • C:\Users\Admin\Desktop\50C07F-Readme.txt
      MD5

      6886e622d1d59aa2d25c92659aa7dd63

      SHA1

      733a128f1dd51b65a749fcb994cbb9ba37fb6449

      SHA256

      c16d095fdd30ecf69dea998addb16d792e14e390fcdfb311aa029d0ddd6560c6

      SHA512

      3ca74e985213b8b9aeede5cfe1075c9937d534ead6ddc46a80b08fe61cae1f507821da7d98b9fc6a52830cbca00b158e0eb5b9eb2c2c494196d5a9a62f8ff363

      Download Submit
    • memory/3028-116-0x0000000000000000-mapping.dmp
      Download
    • memory/3260-114-0x0000000002180000-0x00000000021A6000-memory.dmp
      Filesize

      152KB

      Download
    • memory/3260-115-0x0000000000400000-0x000000000044B000-memory.dmp
      Filesize

      300KB

      Download
    • memory/4168-118-0x0000000000000000-mapping.dmp
      Download
    • memory/5552-117-0x0000000000000000-mapping.dmp
      Download
    • memory/6672-120-0x0000000000000000-mapping.dmp
      Download