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TrojanClicker:Win32/Chroject

First posted on 29 January 2015.
Source: Microsoft

Aliases :

There are no other names known for TrojanClicker:Win32/Chroject.

Explanation :

Threat behavior

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

• %LOCALAPPDATA%\adobe\otzsdemeg.dll
• %LOCALAPPDATA%\applicationhistory\otzsdemeg.dll
• %LOCALAPPDATA%\shareaza\otzsdemeg.dll

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: "otzsdemeg"
With data: "regsvr32.exe /s "%LOCALAPPDATA%\shareaza\otzsdemeg.dll""



The malware uses code injection to make it harder to detect and remove. It can inject code into running processes.



Payload

Contacts remote hosts

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

• 207.244.69.24
• 109.206.180.132
• 109.206.180.132

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

Clicks on advertisements

This trojan can use your PC to click on online advertisements without your permission or knowledge.

A malicious hacker can earn money out of these clicks by making a website or application appear more popular than it is.



Additional information

Creates a mutex

This threat can create one or more mutexes on your PC. For example:

• c:!documents and settings!administrator!local settings!application data!ares!orzzkehh!history!history.ie5!
• c:!documents and settings!administrator!local settings!application data!ares!orzzkehh!temporary internet files!content.ie5!
• Xvblgrkmsz
• Xvblgrkmsz_385

It might use this mutex as an infection marker to prevent more than one copy of the threat running on your PC.

This malware description was published using automated analysis of file SHA1 99289afb78be3b214bdbf448b3d49bdc1c32226c.Symptoms

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

• You see these files:
  • %LOCALAPPDATA%\adobe\otzsdemeg.dll
  • %LOCALAPPDATA%\applicationhistory\otzsdemeg.dll
  • %LOCALAPPDATA%\shareaza\otzsdemeg.dll

• You see registry modifications such as:
  
  • In subkey: HKCU\software\microsoft\windows\currentversion\run
    Sets value: "otzsdemeg"
    With data: "regsvr32.exe /s "%LOCALAPPDATA%\shareaza\otzsdemeg.dll""
    
    

• The presence of a mutex such as:
  • c:!documents and settings!administrator!local settings!application data!ares!orzzkehh!history!history.ie5!
  • c:!documents and settings!administrator!local settings!application data!ares!orzzkehh!temporary internet files!content.ie5!
  • Xvblgrkmsz
  • Xvblgrkmsz_385

Last update 29 January 2015

 

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