Overview

overview

10

Static

static

10

55a32decdd...a6.exe

windows7_x64

10

55a32decdd...a6.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    159s
  • max time network
    134s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01-02-2022 01:31

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General

  • Target

    55a32decdd9625245bf064c832962bf2271bff8bb5b8d8fb1bc6ec06dae4aea6.exe

  • Size

    148KB

  • MD5

    d3a3064a627830136702bc0049a7ce0f

  • SHA1

    3f23d300afca6d90ef710dc9aeaa44f5e4f362a5

  • SHA256

    55a32decdd9625245bf064c832962bf2271bff8bb5b8d8fb1bc6ec06dae4aea6

  • SHA512

    a744f192a1cefc0a3bfbdd54d4a78245f8301c6fd7efe0e1eb16cc8a9d63c16b5667b1c003ddbf0a89bad47325acfa3b0bd65eaa638bbe207ef3c8e21c73902e

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

C:\Program Files\VideoLAN\VLC\lua\meta\reader\4C2778-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .4c2778 -- 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_4c2778: QOwHuZqOHi3EYhjGzarxtldZUmx78l3aQJqpr79k8h5edTD/Nv B2au/3XEB2p9Jp+4wL+cC8sCA2MWBvOnvePO0mYI1lq9FO41Zj AhDwuYpiafNIRcfQSkbABqj5v55yXjYLef9P5VHvqIIHSAQapW ys3sNNsi6RRv8UNNJk97duY0VHTflmhhwZYSdaJGIFlVx1DnKs fqGYWt/SM9wcOmRFCdr6TQEh7hkVNPLCC5Qfv0YZUp4GVNlThX DWAK9j6euyWEWorPn+QtXtOuMlUDaKzFcbjO616g==}
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 4 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 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\55a32decdd9625245bf064c832962bf2271bff8bb5b8d8fb1bc6ec06dae4aea6.exe
    "C:\Users\Admin\AppData\Local\Temp\55a32decdd9625245bf064c832962bf2271bff8bb5b8d8fb1bc6ec06dae4aea6.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:1612
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:960
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1072

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

  • memory/1612-55-0x00000000763F1000-0x00000000763F3000-memory.dmp
    Filesize

    8KB

    Download