Overview

overview

10

Static

static

3

2025-01-22...to.exe

windows7-x64

10

2025-01-22...to.exe

windows10-2004-x64

10

Resubmissions

22-01-2025 17:57

250122-wj2xjsxrcy 10

22-01-2025 17:23

250122-vyhxjswrcz 10

22-01-2025 11:23

250122-nhgk8avlal 10

Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    22-01-2025 11:23

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General

  • Target

    2025-01-22_005d09ed67681b222e581e8741fc1d64_mailto.exe

  • Size

    57KB

  • MD5

    005d09ed67681b222e581e8741fc1d64

  • SHA1

    22f1ae3021a7b64c66a06f857ca6980440904672

  • SHA256

    17317e47af9ecac9efa465dfe13e130fc1285160974041a75e0a90e21908d1af

  • SHA512

    01b32a89435269ee3090595a02aee190715bf68315705b1e665d6d7507a6d84c271169e7e267faaa97e519713c3c563b9fc81bef208e2bd13334a7bd9f33b0ec

  • SSDEEP

    1536:Pokamp8C3eGQYVynB7pc21bV5Mbem9zM0gh2ZHHTsrt:PoxmyeDQYQB+21bVabemtM0Y0zc

Score
10/10
netwalkerdiscoveryransomwarespywarestealer

Malware Config

Extracted

Path

C:\Users\Public\Music\Sample Music\B5DF00-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .b5df00 -- 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_b5df00: 9oxs79u/d4bf7rwA0HeVjdODtVyO1emZARgWEJZR3kZpVIuSpN 7/OqsYfxEpJqBh5Ofoil2TZwBVwuvUg2JNDkWy6EKH6PR/NPbn h7pmypEX4dCYtVqtPNt855h9bBNsZiWHjFqNyWXMpgFxOS3mO5 6Hf31ipW+o1QRZlBJ91o3hMVeDOAnQDPwKY5b/rM1xLruckLNg l6LCbrrlypDOR8H68x7CiCg+4GJ/nbjHLXwYlK79Fat/jZphzF dtGA4xsB0PnOuKVWIx43BFSugqgG5p3hlRKcD1ug==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Netwalker family
    netwalker
  • Renames multiple (7368) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Reads user/profile data of web browsers 3 TTPs

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

    spywarestealer
  • Drops file in Program Files directory 64 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2025-01-22_005d09ed67681b222e581e8741fc1d64_mailto.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-01-22_005d09ed67681b222e581e8741fc1d64_mailto.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2496
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\B5DF00-Readme.txt"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2584

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Public\Music\Sample Music\B5DF00-Readme.txt
    Filesize

    1KB

    MD5

    64c8228b466d8e5699b037f1e48e4ba4

    SHA1

    65c866702001abb069f2051c2610d2c2f9e1fc7b

    SHA256

    019b89fe260a93a866d1f846a9cc07ac02b7a3eefd004fc6215d9f9d34ee1670

    SHA512

    3e38000f5ba0f8577fa4a8585bc30bf44a3a5cbc585946551bdd8316f7f94ad65a6b608f10853127dc30d39907225715806d6bc70f780c1e45b2cdee3ac59b36

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