Overview

overview

10

Static

static

10

fd3489f606...13.exe

windows7_x64

10

fd3489f606...13.exe

windows10_x64

10

Analysis

  • max time kernel
    132s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    09-11-2020 20:17

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General

  • Target

    fd3489f6067ef7ca3999776205839424cb7349134baaeb693abcecaa2c5bf913.exe

  • Size

    69KB

  • MD5

    fcedea8111abbb61e40fa5ed486fd434

  • SHA1

    1d837e6ece7ff326fcbeff7994744f7bd5434d99

  • SHA256

    fd3489f6067ef7ca3999776205839424cb7349134baaeb693abcecaa2c5bf913

  • SHA512

    7d8383b371c3206624fffd844c1af52f5cb0f3b327b06bbe6f657485ba4e70d6390865fc5febaf60eafd9e63cc41c12d0f4e5e99c07951ce0886916b47f123b1

Score
10/10
netwalkerpersistenceransomwarespyware

Malware Config

Extracted

Path

C:\Users\Admin\AA7CA1-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .aa7ca1 -- 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_aa7ca1: GAhRIk1ugSCB25Ww8ZMQFfGSj/A2uI7qFku+sKxR4vd7AWa2Mx i0Q971rvyxfWEllXcsqpFNCykPqPp4ohjgWEOTgrf8RfZuweWl e1wEU+6/aVSr7h7pvVDlt46KHnjnZlP+niudLvk1BVsuVQwA7I Bt1wfEkZLltP3smWZXi2jI49JctnrHmULWkLuV97epkFj9ca2k Jc5GVCJ8srxhUi7WBSBpEgoMKgYxC5HY8jnzM8uTjM7EEVntR4 kIhAqdAGxk6Yq7ZeuG5vfGHDPqZDHmfOk9wfNtKw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\AA7CA1-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .aa7ca1 -- 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_aa7ca1: GAhRIk1ugSCB25Ww8ZMQFfGSj/A2uI7qFku+sKxR4vd7AWa2Mx i0Q971rvyxfWEllXcsqpFNCykPqPp4ohjgWEOTgrf8RfZuweWl e1wEU+6/aVSr7h7pvVDlt46KHnjnZlP+niudLvk1BVsuVQwA7I Bt1wfEkZLltP3smWZXi2jI49JctnrHmULWkLuV97epkFj9ca2k Jc5GVCJ8srxhUi7WBSBpEgoMKgYxC5HY8jnzM8uTjM7EEVntR4 kIhAqdAGxk6Yq7ZeuG5vfGHDPqZDHmfOk9wfNtKw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .aa7ca1 -- 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_aa7ca1: GAhRIk1ugSCB25Ww8ZMQFfGSj/A2uI7qFku+sKxR4vd7AWa2Mx i0Q971rvyxfWEllXcsqpFNCykPqPp4ohjgWEOTgrf8RfZuweWl e1wEU+6/aVSr7h7pvVDlt46KHnjnZlP+niudLvk1BVsuVQwA7I Bt1wfEkZLltP3smWZXi2jI49JctnrHmULWkLuV97epkFj9ca2k Jc5GVCJ8srxhUi7WBSBpEgoMKgYxC5HY8jnzM8uTjM7EEVntR4 kIhAqdAGxk6Yq7ZeuG5vfGHDPqZDHmfOk9wfNtKw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • 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 9 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.

    spyware
  • Modifies service 2 TTPs 5 IoCs
    persistence
  • Drops file in Program Files directory 7485 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 14105 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fd3489f6067ef7ca3999776205839424cb7349134baaeb693abcecaa2c5bf913.exe
    "C:\Users\Admin\AppData\Local\Temp\fd3489f6067ef7ca3999776205839424cb7349134baaeb693abcecaa2c5bf913.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:1960
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1348
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\AA7CA1-Readme.txt"
      2⤵
        PID:4604
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c "C:\Users\Admin\AppData\Local\Temp\B867.tmp.bat"
        2⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:1840
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 1960
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:5440
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Modifies service
      • Suspicious use of AdjustPrivilegeToken
      PID:3896

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Modify Existing Service

    1
    T1031

    Privilege Escalation

    Defense Evasion

    File Deletion

    2
    T1107

    Modify Registry

    1
    T1112

    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\B867.tmp.bat
      MD5

      77d9992a7d3ba58da8ca6e20966d2857

      SHA1

      7faa4b7a05c042aaeb6b5f2e0aadd03930321adb

      SHA256

      edf49e0b9fc0b9df3443434c139e5fe0634acb04b6f54c362280dad9972ac7bf

      SHA512

      83c656e9ca0501fcd3bb6833e0e16910cba7c3f19dd53d7cbb3f4c3d4137839b5b046495f5321210cc00ab7d0ce00fc77a60af7c92e443e3690f6ee719a5fe93

      Download Submit
    • C:\Users\Admin\Desktop\AA7CA1-Readme.txt
      MD5

      4ac51dd2195004ea78ffcbaea0abf62e

      SHA1

      b85b9b5a000ddadd6f9c3aeaa85ded13e26183ad

      SHA256

      1ce8d83990da5e62654786beb9aef3d5f7dc6bc2bcf85ebb0673d48dd429ee21

      SHA512

      470590041b8d5f150d5c395d2522c13ff66ba7c4f350a25c68622c6e252838c0cb5bbf04580509d19048d6f5fa989ca95cb786705b1aec3d5ed88ddee048bd2d

      Download Submit
    • memory/1348-0-0x0000000000000000-mapping.dmp
      Download
    • memory/1840-7-0x0000000000000000-mapping.dmp
      Download
    • memory/4604-4-0x0000000000000000-mapping.dmp
      Download
    • memory/5440-12-0x0000000000000000-mapping.dmp
      Download