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TrojanDownloader:Win32/Zegost.C

First posted on 17 July 2015.
Source: Microsoft

Aliases :

There are no other names known for TrojanDownloader:Win32/Zegost.C.

Explanation :

Threat behavior

Installation

This threat is downloaded from the following url:

• hxxp://dhl008.3vzhuji.com/NetSyst81.jpg port 80

The .jpeg file is then renamed as NetSyst81.dll and dropped in the C:\\Program Files\AppPatch folder.



Payload


Downloads malware or unwanted software

This threat can download other malware and unwanted software onto your PC.



Connects to a remote host

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

• a.config.skype.com using port 53
• b.config.skype.com using port 53
• dhl008.3vzhuji.com using port 53

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

Additional information

Creates a mutex

This threat can create a mutex on your PC. For example:

• IESQMMUTEX_0_208

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 040bd1c817ff9e175a116636e31195b74ae9bb64.

Symptoms

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

• You see the following file:
• NetSyst81.dll
• You see the following mutex:
• IESQMMUTEX_0_208

Last update 17 July 2015

 

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