Overview

overview

10

Static

static

10

31d0f82a62...7a.exe

windows7_x64

10

31d0f82a62...7a.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    189s
  • max time network
    212s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    01-02-2022 01:33

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General

  • Target

    31d0f82a620738c929e8a088b5d3c884efa0350483a0f5af1ae80739fb6f547a.exe

  • Size

    69KB

  • MD5

    4343ea4f4eee159412243261ef9e2883

  • SHA1

    7e3f802c345dc6a362d728fb388ff2938486cf28

  • SHA256

    31d0f82a620738c929e8a088b5d3c884efa0350483a0f5af1ae80739fb6f547a

  • SHA512

    c0062b4012867b7e38957f932e824e82898bcfd6a401eb7b409767ac69c03b7a033dcccb0dadf43261951ed958c79cd67c4f8c7b2208993e5d95f7e2f4a105cc

Score
10/10
ransomwarespywarestealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\ConnectedDevicesPlatform\35D5F9-Readme.txt

Ransom Note
Hello, O2MICRO. Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .35d5f9 -- 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. -- *** We have downloaded your documents, databases, documents of your customers, correspondence. We are ready to put everything in public access. Contact us in chat. *** -- 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_35d5f9: /0ATmz7sF3BX2D+m+WE49og36NduTNdMozReLDiGJoi7K4VE11 gkljG636/DNS+kiBdTfwo6BN4hYzlLNS2oWMX8Z3FQkggbEXt0 VHZYrDDDMsMppzablPkT5jBe0FH/YDnxuBrBlUGq3esXDsKumL jJnZDKUAj8ZPCKzw4Mpy1hXcMpoccrizKK4eJQwVLO5T7lQ/vA BXQ3aRuBZQ9SfmimiuHMGQ1OfVVi6r1Rj9ClkSIfyq+fFPeeuB aB7vxX2B/w4QmIIvAFIhBhqLS3UTzRS5ZehAtBNw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • 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\31d0f82a620738c929e8a088b5d3c884efa0350483a0f5af1ae80739fb6f547a.exe
    "C:\Users\Admin\AppData\Local\Temp\31d0f82a620738c929e8a088b5d3c884efa0350483a0f5af1ae80739fb6f547a.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:2480
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:3792
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
      PID:8732
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:7188

    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