Discovered: April 01, 2019
Updated: June 07, 2019 2:17:46 PM
Type: Worm
Infection Length: Varies
Systems Affected: Windows

W32.Beapy is a worm that spreads via SMB, MS SQL, or by exploiting vulnerabilities in the Windows operating system.

Antivirus Protection Dates

  • Initial Rapid Release version April 02, 2019 revision 001
  • Latest Rapid Release version October 08, 2019 revision 007
  • Initial Daily Certified version April 02, 2019 revision 007
  • Latest Daily Certified version July 29, 2019 revision 007
  • Initial Weekly Certified release date April 03, 2019

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Technical Description

The worm spreads via SMB (TCP/445) or MS SQL (TCP/1433), and by exploiting the following vulnerabilities in Microsoft Windows SMB Server:

Once executed, the worm creates the following files:
  • %Temp%\Crypto.Cipher._ARC4.pyd
  • %Temp%\Crypto.Cipher._DES.pyd
  • %Temp%\Crypto.Cipher._DES3.pyd
  • %Temp%\Crypto.Hash._MD4.pyd
  • %Temp%\Crypto.Hash._SHA256.pyd
  • %Temp%\Crypto.Random.OSRNG.winrandom.pyd
  • %Temp%\Crypto.Util._counter.pyd
  • %Temp%\Crypto.Util.strxor.pyd
  • %Temp%\Include\pyconfig.h
  • %Temp%\Microsoft.VC90.CRT.manifest
  • %Temp%_ctypes.pyd
  • %Temp%_hashlib.pyd
  • %Temp%_mssql.pyd
  • %Temp%_multiprocessing.pyd
  • %Temp%_socket.pyd
  • %Temp%_ssl.pyd
  • %Temp%\bz2.pyd
  • %Temp%\ii.exe.manifest
  • %Temp%\msvcm90.dll
  • %Temp%\msvcp90.dll
  • %Temp%\msvcr90.dll
  • %Temp%\pyexpat.pyd
  • %Temp%\python27.dll
  • %Temp%\pywintypes27.dll
  • %Temp%\select.pyd
  • %Temp%\unicodedata.pyd
  • %Temp%\win32api.pyd
  • %Temp%\win32event.pyd
  • %Temp%\win32pipe.pyd
  • %Temp%\win32wnet.pyd
  • %CurrentFolder%\m2.ps1
  • %CurrentFolder%\mkatz.ini

The worm appends a random character to the following file:
  • %Windir%\Temp\svchost.exe

It then copies it to the following file:
  • %Windir%\[RANDOM CHARACTER].exe

The worm also writes “*” to the following file:
  • %Windir%\Temp\doadmin.txt

Next, the worm checks the IP address of the compromised computer by visiting the following remote locations:
  • http://ip.[REMOVED]
  • http://j[REMOVED]

The worm connects to the following command and control (C&C) servers and sends confidential information from the compromised computer such as hostname, MAC address, operation system version:
  • http://info.a[REMOVED]
  • http://info.a[REMOVED]
  • http://info.b[REMOVED]

The worm drops and executes the following file:

The worm then attempts to spread to other computers on the network by using a list of hardcoded user names and passwords as well as credentials gathered via Hacktool.Mimikatz.

If the worm is successful it performs the following actions:
  • Creates a copy of itself
  • Creates a scheduled task

It also attempts to create the following user as an administrator on the compromised computer:
  • User name: k8h3d
  • Password: k8d3j9SjfS7

The worm also has the ability to exploit the EternalBlue SMB vulnerability (MS17-010) to spread.


Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.


You may have arrived at this page either because you have been alerted by your Symantec product about this risk, or you are concerned that your computer has been affected by this risk.

Before proceeding further we recommend that you run a full system scan. If that does not resolve the problem you can try one of the options available below.

If you are a Norton product user, we recommend you try the following resources to remove this risk.

Removal Tool
Use our tools to remove aggressive risks from your computer.

Infected Windows system files may need to be repaired using the Windows installation CD .

How to reduce the risk of infection
Check out our extensive collections of helpful advice and tips on how to stay safe online .

If you are a Symantec business product user, we recommend you try the following resources to remove this risk.

Identifying and submitting suspect files
Submitting suspicious files to Symantec allows us to ensure that our protection capabilities keep up with the ever-changing threat landscape. Submitted files are analyzed by Symantec Security Response and, where necessary, updated definitions are immediately distributed through LiveUpdate™ to all Symantec end points. This ensures that other computers nearby are protected from attack. The following resources may help in identifying suspicious files for submission to Symantec.

Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD .

The following instructions pertain to all current Symantec antivirus products.

1. Performing a full system scan
For information on how to run a full system scan using your Symantec product, follow the guidance given in the product's Help section.

2. Restoring settings in the registry
Many risks make modifications to the registry, which could impact the functionality or performance of the compromised computer. While many of these modifications can be restored through various Windows components, it may be necessary to edit the registry. See in the Technical Details of this writeup for information about which registry keys were created or modified. Delete registry subkeys and entries created by the risk and return all modified registry entries to their previous values.

Writeup By: Hiroshi Shinotsuka