Overview

overview

10

Static

static

10

a9a1473138...in.exe

windows7_x64

10

a9a1473138...in.exe

windows10_x64

10

Analysis

  • max time kernel
    118s
  • max time network
    36s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    09-11-2020 20:17

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General

  • Target

    a9a147313861a5a4e7abd76b3287ce5f6183966b89c5ca95c0e0cf587f40189d.bin.exe

  • Size

    69KB

  • MD5

    bc75859695f6c2c5ceda7e3be68e5d5a

  • SHA1

    5be2fb7adcfefd741e6b98b4beeadf9e24ea7423

  • SHA256

    a9a147313861a5a4e7abd76b3287ce5f6183966b89c5ca95c0e0cf587f40189d

  • SHA512

    64aa4beec446dfc8fbe677a714095ac0b478fc286ca0ec8cb2d798df03d220739bb6ad213102210c52e63368595c7cc991895c5ed68764774d2b97ce103e59ae

Score
10/10
netwalkerpersistenceransomwarespyware

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\MF\DC293F-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .dc293f -- 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_dc293f: BRfjupAUjonPYCu3snKfu893/MJADyPjsvjM9gO+NeRvxTU0z1 PlXYVFLeDueOUrP7QbNT+U+KItT/GTwjNd0+rgG0Nkzi0gr95D eilz+z9VPS/sLe4scbQeiq/pcJPUwQG8W/3/vSyHnLRjBV7Sq4 Oz9a0Hcif/1xIjD+ew56P6OYtikWjusmZ0jSOZNimBG6tqxJJH T+DoYSf6ylLwUSCkrM1LiMkrSxlBrG8euZsp2z+H/RWNuAPTUo JCk5EBKlNC4FkzvF6TZW26T1ECBe66WSNoMkjgLA==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files\7-Zip\DC293F-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .dc293f -- 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_dc293f: BRfjupAUjonPYCu3snKfu893/MJADyPjsvjM9gO+NeRvxTU0z1 PlXYVFLeDueOUrP7QbNT+U+KItT/GTwjNd0+rgG0Nkzi0gr95D eilz+z9VPS/sLe4scbQeiq/pcJPUwQG8W/3/vSyHnLRjBV7Sq4 Oz9a0Hcif/1xIjD+ew56P6OYtikWjusmZ0jSOZNimBG6tqxJJH T+DoYSf6ylLwUSCkrM1LiMkrSxlBrG8euZsp2z+H/RWNuAPTUo JCk5EBKlNC4FkzvF6TZW26T1ECBe66WSNoMkjgLA==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .dc293f -- 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_dc293f: BRfjupAUjonPYCu3snKfu893/MJADyPjsvjM9gO+NeRvxTU0z1 PlXYVFLeDueOUrP7QbNT+U+KItT/GTwjNd0+rgG0Nkzi0gr95D eilz+z9VPS/sLe4scbQeiq/pcJPUwQG8W/3/vSyHnLRjBV7Sq4 Oz9a0Hcif/1xIjD+ew56P6OYtikWjusmZ0jSOZNimBG6tqxJJH T+DoYSf6ylLwUSCkrM1LiMkrSxlBrG8euZsp2z+H/RWNuAPTUo JCk5EBKlNC4FkzvF6TZW26T1ECBe66WSNoMkjgLA==}
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 1 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spyware
  • Modifies service 2 TTPs 5 IoCs
    persistence
  • Drops file in Program Files directory 7499 IoCs
  • Interacts with shadow copies 2 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 17901 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a9a147313861a5a4e7abd76b3287ce5f6183966b89c5ca95c0e0cf587f40189d.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\a9a147313861a5a4e7abd76b3287ce5f6183966b89c5ca95c0e0cf587f40189d.bin.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:292
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1504
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\DC293F-Readme.txt"
      2⤵
        PID:5188
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c "C:\Users\Admin\AppData\Local\Temp\D95E.tmp.bat"
        2⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:4784
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 292
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:1560
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Modifies service
      • Suspicious use of AdjustPrivilegeToken
      PID:2596

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Modify Existing Service

    1
    T1031

    Privilege Escalation

    Defense Evasion

    File Deletion

    2
    T1107

    Modify Registry

    1
    T1112

    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

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\D95E.tmp.bat
      MD5

      4eb436ba0455cd1317cc8304629fd866

      SHA1

      f10ab259b4c3e91a2279d98d3a405af0b21371ae

      SHA256

      d31b60a53625f9fb657d5610e842c15510201bb02c6b01354bd9decc79224240

      SHA512

      14fa8f0526fcb0bbc432366625a3e8cd37a6b0341fd0611465c3ae8d7c83a828316577e5889691fd946bced351952ba3f04ce08694b7e7c831e7bba1770a102e

      Download Submit
    • C:\Users\Admin\Desktop\DC293F-Readme.txt
      MD5

      22567e1fa2a468dacf8e6f074ac1c780

      SHA1

      9a9d239ade869f12622295d02407e3f0c7d2d81f

      SHA256

      63082632b829ea71fcf343fe2ecd9a3d751febacb78eb56075647d21242970f2

      SHA512

      8ff8b178dba142eaefdcb7acba8c57c604dfb1a1c6df98e6598631de3a0fbd3b4aa58c8aedebf58ed8b83727d25dd27d5d7d5949a017ef1699a413dada6852ec

      Download Submit
    • memory/1504-0-0x0000000000000000-mapping.dmp
      Download
    • memory/1560-12-0x0000000000000000-mapping.dmp
      Download
    • memory/4784-7-0x0000000000000000-mapping.dmp
      Download
    • memory/5188-4-0x0000000000000000-mapping.dmp
      Download