Overview

overview

10

Static

static

10

8753133dfc...40.exe

windows7_x64

1

8753133dfc...40.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    176s
  • max time network
    167s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    01-02-2022 01:28

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General

  • Target

    8753133dfcece88e52666fcf7e1a79400284b430ccb6320c78e425f6c5cf6840.exe

  • Size

    69KB

  • MD5

    b76547ddbc0e1629cd71bfff6bfce483

  • SHA1

    874b1a91edf573896c1d03c79875b45d1508d4f7

  • SHA256

    8753133dfcece88e52666fcf7e1a79400284b430ccb6320c78e425f6c5cf6840

  • SHA512

    699ffeb2ed7d89006ec464977aff4bcbd1ac0725b9a5083b72f6440653b9b00a591eaf8c30328e005d3f3e16de87d4dd490725fffa905c6e1c0ae58eedfc1e6b

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\MF\BBF5A1-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .bbf5a1 -- 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_bbf5a1: UUIXgjb9n8coS0cO5MvDdP3OyfoMfKoyA3sgjkldrPtFmY/+KL vZuJzRI9LjYO8z1hgQFs9Cg19L3rm2QqL4KQvUBXX5oEdGRw+2 qO3XXbowyUXsGo3iKzx5uyUOXp6n+N3LQX7j1Y6IlahkoyCXOP H5O53f60HMcLw1J7rnLNl0sXMgcVwzag8jG6dDf8ktpAV0KNQN Hkr2lB6526prHQ93pGx+15FP3rQ5qjMREM7Z3xxmIvBNpRtEJk aCe/8wo/Ws6vEm80bB7+IM1ckwH/PK3iuegr/bOQ==}
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 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 5 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8753133dfcece88e52666fcf7e1a79400284b430ccb6320c78e425f6c5cf6840.exe
    "C:\Users\Admin\AppData\Local\Temp\8753133dfcece88e52666fcf7e1a79400284b430ccb6320c78e425f6c5cf6840.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:480
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:2072
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
      PID:5212
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4080

    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