Analysis

  • max time kernel
    182s
  • max time network
    194s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    01-02-2022 01:26

General

  • Target

    949fae98b348c681b12e5aa825316313e1d161e7a4d93e3062d97be310404f65.exe

  • Size

    66KB

  • MD5

    b5f8b0a1e57ea0bebe817de50e3b34b7

  • SHA1

    f2955890b2aef6f7ad29ed3a2efea425e1851fea

  • SHA256

    949fae98b348c681b12e5aa825316313e1d161e7a4d93e3062d97be310404f65

  • SHA512

    95e82028bc3de2885caaa316787eb056e06fa6b599d98b6e35505bd77a56a300c8bb5197cacf3332fe26008f432654aefc1fdcbbb6ddb5aa0b316d7f16f10899

Malware Config

Extracted

Path

C:\9F6461-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .9f6461 -- 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_9f6461: ee4x4Twt5N59Nobu3jKMa49MNR7zXKTZcbMWNU0x0cXZrXj5rl pJ5W/WIKZvwSvKB0MDSV6lagckVrTrYI4oqXgY+AJwFzlp0o4I +PpSXcGNVjrt6J2i1B4otfUMjli42pdJMr6A57VtAss8UOtp38 sJABQa534RhhwUrfM3wsrgc4Qb2XI18g+aNMNA3xrQYk5nxJ7E 7rVAMOUSzeHbysKNCE535u1vTcMaqjxxgHHd2krJ71JUO/YSEJ GWSmPfnkZNTp3dSVc2Q9OLwAr6mOgfUDaArtiElA==}
URLs

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Sets service image path in registry 2 TTPs
  • Reads user/profile data of web browsers 2 TTPs

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

  • 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.

  • Modifies data under HKEY_USERS 41 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\949fae98b348c681b12e5aa825316313e1d161e7a4d93e3062d97be310404f65.exe
    "C:\Users\Admin\AppData\Local\Temp\949fae98b348c681b12e5aa825316313e1d161e7a4d93e3062d97be310404f65.exe"
    1⤵
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3852
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1752
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
    1⤵
      PID:1928
    • C:\Windows\System32\WaaSMedicAgent.exe
      C:\Windows\System32\WaaSMedicAgent.exe ae72471f9eb2bec6706584404ee30a0f /qhMMxK3h0WVn1YB0kAugw.0.1.0.0.0
      1⤵
      • Modifies data under HKEY_USERS
      PID:940
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
        PID:5680

      Network

      MITRE ATT&CK Enterprise v6

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      Downloads