Banker.CNZ is a Trojan, which although seemingly inoffensive, can actually carry out attacks and intrusions.
It captures certain information entered or saved by the user, with the corresponding threat to privacy:
keystrokes, in order to obtain information for accessing online banking services, passwords and other confidential information.
It reduces the security level of the computer:
it notifies the attacker that the computer has been compromised and is ready to be used maliciously; it opens one or more ports to allow remote access to the computer and takes action that compromises user confidentiality.
Banker.CNZ prevents access from programs to websites of several companies related with security tools (antivirus programs, firewalls, etc.).
Banker.CNZ redirects attempts to access web pages of certain banks to spoofed pages, with the aim of logging information entered by the user in these pages.
Banker.CNZ accesses several websites to download files, which it then runs. These can be any type of file, although they are normally malware.
Banker.CNZ uses the following propagation or distribution methods:
- Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.
- Via Internet, exploiting remote vulnerabilities: attacking random IP addresses, in which it tries to insert a copy of itself by exploiting one or more vulnerabilities.