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HackTool:Win32/Dohuk

First posted on 30 January 2015.
Source: Microsoft

Aliases :

There are no other names known for HackTool:Win32/Dohuk.

Explanation :

Threat behavior

Installation
This threat can create files on your PC, including:

• %APPDATA%\winrar\python27.dll
• %APPDATA%\winrar\w9xpopen.exe
• %APPDATA%\winrar\winrar.exe

It modifies the registry so that it runs each time you start your PC. For example:

In subkey: HKCU\software\microsoft\windows\currentversion\run
Sets value: "Winrar"
With data: "%APPDATA%\winrar\winrar.exe"



Payload


Connects to a remote host

We have seen this threat connect to a remote host, including:

• download1074.mediafire.com using port 80
• download1589.mediafire.com using port 80
• download1519.mediafire.com using port 80
• download1076.mediafire.com using port 80
• download1582.mediafire.com using port 80
• download1505.mediafire.com using port 80
• download1324.mediafire.com using port 80
• download843.mediafire.com using port 80
• download948.mediafire.com using port 80
• download943.mediafire.com using port 80

Malware can connect to a remote host to do any of the following:

• Check for an Internet connection
• Download and run files (including updates or other malware)
• Report a new infection to its author
• Receive configuration or other data
• Receive instructions from a malicious hacker
• Search for your PC location
• Upload information taken from your PC
• Validate a digital certificate

We have seen this threat access online content, including:

• _ssl.pyd
• bot.exe
• _hashlib.pyd
• w9xpopen.exe
• python27.dll

This malware description was published using automated analysis of file SHA1 b9cd9c5b6673db452b90a496b955e0e057b457b7.Symptoms

The following can indicate that you have this threat on your PC:

• You see these files:
  • %APPDATA%\winrar\python27.dll
  • %APPDATA%\winrar\w9xpopen.exe
  • %APPDATA%\winrar\winrar.exe
  • %USERPROFILE%\local settings\temporary internet files\content.ie5\4latwvsh\python27[1].dll
  • %USERPROFILE%\local settings\temporary internet files\content.ie5\ah2d4t2z\bot[1].exe
  • %USERPROFILE%\local settings\temporary internet files\content.ie5\ctirg5gl\w9xpopen[1].exe

• You see registry modifications such as:
  
  • In subkey: HKCU\software\microsoft\windows\currentversion\run
    Sets value: "Winrar"
    With data: "%APPDATA%\winrar\winrar.exe"
    
    

Last update 30 January 2015

 

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