Overview

overview

10

Static

static

10

6bd34d33cc...le.exe

windows7_x64

10

6bd34d33cc...le.exe

windows10_x64

10

Analysis

  • max time kernel
    159s
  • max time network
    162s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    26-07-2021 12:41

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General

  • Target

    6bd34d33ccb47430751ae964ca56ec206da0fa3bdc5eb670fc54edf4c11629bc.sample.exe

  • Size

    69KB

  • MD5

    3f3cc36f4298c4db8e77794eb96db81a

  • SHA1

    2861da47ebc33a57aa93e483b1ea946a5b33b345

  • SHA256

    6bd34d33ccb47430751ae964ca56ec206da0fa3bdc5eb670fc54edf4c11629bc

  • SHA512

    8cab92e54aeda3be69ae0bbdd47e15be43e57176fcaafd92afa2a2f68afb0099caf65bcb38359395f6f84616af07f928e7aa2fb576e7ee0130f42a1fdb00d505

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\User Account Pictures\5446E1-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .5446e1 -- 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_5446e1: zrayy/KxAvO3SEUpM9VCuYhZKsZku9NRqz59J581V3AlFvTtgS YjR8wazEEBTkxbXWb4RkfUgXD+FQ3iyoba9rg9Xys6H59TlCsh rY/NmjE6lvI50m9OWintXbgi76vUzXaoaUJ3LhdlJKnsUGNAJo MZPaoa1GQmm/Irw8K47GzII/n2v501m+FjAj0mGP/cl+JkRFQv omf6tQ2qSM6MZrB4xpWKPLXtunjMZPSuuBHA4jQ6NtFuSJoYUS w7PGL7BXo/ij0hx5s6HdApUkT0ox2f48x+azaIhg==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Users\Admin\Downloads\5446E1-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .5446e1 -- 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_5446e1: zrayy/KxAvO3SEUpM9VCuYhZKsZku9NRqz59J581V3AlFvTtgS YjR8wazEEBTkxbXWb4RkfUgXD+FQ3iyoba9rg9Xys6H59TlCsh rY/NmjE6lvI50m9OWintXbgi76vUzXaoaUJ3LhdlJKnsUGNAJo MZPaoa1GQmm/Irw8K47GzII/n2v501m+FjAj0mGP/cl+JkRFQv omf6tQ2qSM6MZrB4xpWKPLXtunjMZPSuuBHA4jQ6NtFuSJoYUS w7PGL7BXo/ij0hx5s6HdApUkT0ox2f48x+azaIhg==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .5446e1 -- 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_5446e1: zrayy/KxAvO3SEUpM9VCuYhZKsZku9NRqz59J581V3AlFvTtgS YjR8wazEEBTkxbXWb4RkfUgXD+FQ3iyoba9rg9Xys6H59TlCsh rY/NmjE6lvI50m9OWintXbgi76vUzXaoaUJ3LhdlJKnsUGNAJo MZPaoa1GQmm/Irw8K47GzII/n2v501m+FjAj0mGP/cl+JkRFQv omf6tQ2qSM6MZrB4xpWKPLXtunjMZPSuuBHA4jQ6NtFuSJoYUS w7PGL7BXo/ij0hx5s6HdApUkT0ox2f48x+azaIhg==}
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 11 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
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6bd34d33ccb47430751ae964ca56ec206da0fa3bdc5eb670fc54edf4c11629bc.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\6bd34d33ccb47430751ae964ca56ec206da0fa3bdc5eb670fc54edf4c11629bc.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:2028
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1984
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:5152

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

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Downloads

  • memory/1984-61-0x0000000000000000-mapping.dmp
    Download
  • memory/2028-60-0x0000000076691000-0x0000000076693000-memory.dmp
    Filesize

    8KB

    Download
  • memory/2028-62-0x0000000028DF0000-0x0000000028E6D000-memory.dmp
    Filesize

    500KB

    Download
  • memory/2028-63-0x00000000134A0000-0x000000001351D000-memory.dmp
    Filesize

    500KB

    Download