Overview

overview

10

Static

static

10

48eebda6ff...72.exe

windows7_x64

10

48eebda6ff...72.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    168s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01-02-2022 01:32

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General

  • Target

    48eebda6ff2c95ae27983149e3b7537e00905ab932b3bbf09e17956325a2c172.exe

  • Size

    66KB

  • MD5

    477d0af6a0c291f1c28ea061729cfced

  • SHA1

    16b719a774e280cfe725fee4a33884fe3972ccee

  • SHA256

    48eebda6ff2c95ae27983149e3b7537e00905ab932b3bbf09e17956325a2c172

  • SHA512

    ed8780407d22762df95a7cc5443da12a791e5382f6e7632066a4e9b3bdbd135a83cd0d4a1dadac5da0f9ce6fb722d2e70cd6bd6c3511440e4030ba13cafdead8

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\Assistance\Client\1.0\ja-JP\3FD3C1-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .3fd3c1 -- 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_3fd3c1: ZqeovPY265JzuaJonQ8YWtlSXKc7aAAe44tQfiS+ZmuI+pI3/L V0/RaxkG0ymEmcN/LLBa72zQIUopkt1VJHgTP4rELVVZ4c41Zj AtdgThoUJzZDbZQA7H5j+BzPs0SlYNFDqfX9IT6QhyvQ7NRWWn vFH5ISTWkB6yyPJo0a6JyxGStOftT6qDLqZUvJtmigmcae7EnX W8En9R1Y6NYQXwwbvAYtD29eEdYEanZXvjMAn2GJvJSYnrFIeq mJbEThSqXTIvl/z7unF17J2AIaWFuqaTKlDMc3gg==}
URLs

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 3 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 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\48eebda6ff2c95ae27983149e3b7537e00905ab932b3bbf09e17956325a2c172.exe
    "C:\Users\Admin\AppData\Local\Temp\48eebda6ff2c95ae27983149e3b7537e00905ab932b3bbf09e17956325a2c172.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:1704
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1764

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1704-54-0x0000000075601000-0x0000000075603000-memory.dmp

    Filesize

    8KB

    Download