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Trojan:Win32/C2Lop.N


Trojan:Win32/C2Lop.N is a trojan from a family of malware that modifies web browser settings, adds browser bookmarks, and delivers pop-up advertisements. It is a member of the Trojan:Win32/C2Lop malware family.


What to do now

Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as the Microsoft Safety Scanner (http://go.microsoft.com/fwlink/?LinkId=212742). For more information, see http://www.microsoft.com/protect/computer/viruses/vista.mspx.

Threat behavior

Trojan:Win32/C2Lop.N is a trojan from a family of malware that modifies web browser settings, adds browser bookmarks, and delivers pop-up advertisements. It is a member of the Trojan:Win32/C2Lop malware family.
Installation
Trojan:Win32/C2Lop.N may arrive on a system as a file that is bundled with other software. When run, it launches Internet Explorer and injects its malicious code into the IE process.
Payload
Downloads and Executes Arbitrary Files
Win32/C2Lop.N may connect to a remote web site to download and execute arbitrary files. The downloaded files are usually members of the TrojanDownloader:Win32/Swizzor family or other components of the Trojan:Win32/C2Lop family. Once the downloaded files are successfully installed, unwanted pop-ups and advertisements may be displayed on the system.
 
For example, a specific sample of Win32/C2Lop.N attempts to connect to "ads.netbios-local.com" via TCP port 80 and download files.
 
Analysis by Jireh Sanico

Symptoms

There are no common symptoms associated with this threat. Alert notifications from installed antivirus software may be the only symptom(s).

Prevention


Alert level: Severe
First detected by definition: 1.49.1243.0
Latest detected by definition: 1.151.655.0 and higher
First detected on: Dec 31, 2008
This entry was first published on: Feb 11, 2009
This entry was updated on: Apr 17, 2011

This threat is also detected as:
  • Win32/Swizzor.SV (CA)
  • Mal/Swizzor-B (Sophos)
  • Trojan.Win32.Inject.rx (Kaspersky)
  • Swizzor.gen (McAfee)
  • :Adware/Lop (Panda)
  • Adware.Lop (Symantec)
  • TROJ_DLOADER.QS (Trend Micro)