By Sumo3000 in Trojans

Threat Scorecard

Ranking: 6,030
Threat Level: 50 % (Medium)
Infected Computers: 1,369
First Seen: July 30, 2012
Last Seen: September 5, 2023
OS(es) Affected: Windows

Mal/Zapchas-A is an extremely dangerous Trojan that opens up a backdoor onto the infected computer system. Though to have originated in the Russian Federation, Mal/Zapchas-A has been associated with a number of different botnets. Mal/Zapchas-A connects to an IRC server used to control the infected computer system from afar. This remote access to the infected computer system can be used to steal personal information, to install malware or to turn the infected computer into a drone within a vast bot network. It is fair to say that a Mal/Zapchas-A is a severe security problem that should be dealt with immediately. Mal/Zapchas-A is also designed to create an entry in the Windows Registry so that Mal/Zapchas-A will start up automatically whenever Windows is launched. ESG PC security researchers strongly advise removing Mal/Zapchas-A with a reliable anti-malware program.

The Mal/Zapchas-A Trojan and Botnets

Botnets are vast networks made up of thousands of infected computer systems, also known as bots or drones. Criminals use Trojans such as Mal/Zapchas-A to install a remote access tool onto the infected computer. Then, a criminal can use this remote access tool to control the computer from afar. By causing all the infected computers to connect to a specific IRC channel (Internet Relay Chat), a criminal can control all of the infected computer systems simultaneously to perform coordinated actions. Hackers can sell the services of their botnet to be used by other criminals for sending out huge amounts of spam emails or to attack specific servers by overloading them with connection requests. Infecting a computer system with Mal/Zapchas-A is an essential first step in integrating a computer into a botnet.

The Mal/Zapchas-A Trojan and the iPhone 5 Scam

Criminals can use a variety of tactics to cause an unsuspecting computer user to download and install Mal/Zapchas-A. In October of 2011, Mal/Zapchas-A made the headlines because of Mal/Zapchas-A's association with an email scam. Criminals tried to take advantage of the popularity of the impending iPhone 5 release in that very same month in order to infect computers with the Windows operating system with Mal/Zapchas-A. Victims received a very authentic-looking email claiming to have information on the iPhone 5. Clicking on any of the links in this email takes victims to a malicious website containing scripts that cause Mal/Zapchas-A to be downloaded and installed.

File System Details

Mal/Zapchas-A may create the following file(s):
# File Name Detections
1. explorer.exe
2. sup.bat
3. svchost.exe
4. postcard.gif.exe
5. remote.ini
6. nicks.txt
7. mirc.ico
8. servers.ini
9. control.ini
10. users.ini
11. sup.reg
12. script.ini
13. aliases.ini
14. mirc.ini

Registry Details

Mal/Zapchas-A may create the following registry entry or registry entries:


Mal/Zapchas-A may call the following URLs:


Unistall Mal/Zapchas-A Reply

Thank you for providing this fix, indeed it was a very irritating trojan.

How to remove Mal/Zapchas-A Reply

Mal/Zapchas-A can be detected and quarantined, and then your Antispyware said they have dealt with but it still exists stubbornly in your system after reboot.

Remove Mal/Zapchas-A Reply

Mal/Zapchas-A is one of the Windows illegal malicious programs which may occupy system resources and slow down computers.


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