Overview

overview

10

Static

static

10

2020Netwalker.exe

windows7-x64

10

2020Netwalker.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    121s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    27-10-2024 13:47

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General

  • Target

    2020Netwalker.exe

  • Size

    69KB

  • MD5

    80372de850597bd9e7e021a94f13f0a1

  • SHA1

    037db820c8dee94ae25a439b758a2b89f527cbb4

  • SHA256

    2520b15068fa108c947db179377c6b462f2c4f47037168bf8c69fcb668cb11a8

  • SHA512

    f43db3569ac60d6ed55b9a3a24dcb459e14b0bd944e9405a8cb2bfb686eaeff31c82ffcd6c477d6a6affe9014ae8ed7d8af174e8ceebbcf00b64ad293901a77a

  • SSDEEP

    1536:juCWRxL7hbUiQfovecnXUU+hhOZuIWiFp+ZfaBZebC33O+Pd71vb:KCWf7VJQfmeMXvkhOZu1iFBBZebC3F7t

Score
10/10
netwalkerdefense_evasiondiscoveryexecutionimpactransomwarespywarestealer

Malware Config

Extracted

Path

C:\Program Files (x86)\Microsoft.NET\RedistList\48CBDB-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .48cbdb -- 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_48cbdb: DQ/NAQKvBx35WVmH2uftvkm6cfsyWAgrm/e/W7vAXIe0YLpprc FfxQpuw4oioXXsZKChQ3tEg7iwYwVgrBGUey8YNvt/HnMrAg4e DUMKahQWx4kVn/AxsL+MsPFfj0JPFbTLwNqBNoQNbGIEdJa2xu JeNGtKR8Yb5QXgqxKEuyefCTKBwy2Fg9DgBBHumtWjw+ISDKAx byJBSsNMrvpfDVoSHJn+wm1kaM1RpuD4dde51TQ9TNJzqWU8/g +pjzhsSD5CBi7I2ZScbRij6iG0ISMqcqWW1wOCSA==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Netwalker family
    netwalker
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Renames multiple (7478) files with added filename extension

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

    ransomware
  • Deletes itself 1 IoCs
  • 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 4 IoCs

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

    discovery
  • Interacts with shadow copies 3 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 16 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\2020Netwalker.exe
    "C:\Users\Admin\AppData\Local\Temp\2020Netwalker.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:2504
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1704
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\48CBDB-Readme.txt"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:7628
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c "C:\Users\Admin\AppData\Local\Temp\973.tmp.bat"
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:7844
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /PID 2504
        3⤵
        • System Location Discovery: System Language Discovery
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4560
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:6372

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Microsoft.NET\RedistList\48CBDB-Readme.txt
    Filesize

    1KB

    MD5

    4b9c8042ccfba8e0ddfe740b0377b1c9

    SHA1

    3e995e44b4f2fe9c2201e78bdafef9ed81a32b39

    SHA256

    e07c77e556a21bde4b7ab28310c0c9d338a0e8b38a89d7af7b45cc8e07e8cd0b

    SHA512

    9b7219a3c53c2b1848e67ad5665f4c46e8e3de3c57ad258aef4238b3fa3883516466b01a6c32b251c64685e86afcdb2e9e89cce76322be3ee9a501753fe31536

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  • C:\ProgramData\Microsoft\Assistance\Client\1.0\fr-FR\Help_CValidator.H1D.48cbdb
    Filesize

    12KB

    MD5

    61ff66269c35051391d68c42cdbc49ba

    SHA1

    d2b3ab5c6c8ea02be730d2935d1638707fb3a3ba

    SHA256

    1a876f9f12deeb0f915eecd079a9433ad4b9e77ee4bd2d8ad716cf7b407ade40

    SHA512

    2ecee4e32f04be49f55a6a38be152950a66bf8f5f85714fe8875006e8ebe908e33ea882b4eaf045c6225f8da1a8a43982b3d746ca8fd2613c020ffc7bb69cedc

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  • C:\Users\Admin\AppData\Local\Temp\973.tmp.bat
    Filesize

    90B

    MD5

    0ddd15c277255120f48d15d626870d8d

    SHA1

    ef1ecbd2c09bc905d97e66a096c2c4ef4dc8bdd2

    SHA256

    e32dea1ccd64c6923df97263e8e4b1a138cfcde82c021393052a167e0b9cd71a

    SHA512

    de7631a36d22c81d6ee56016dd3e659df5f2cb9831b11b571db9be01d6a913b8b39b5e9e0c7a64948ec5ee6f0fe3665e4ffdb1508fbafbbbd5f5586c4e12a174

    Download Submit