1. Symantec/
  2. Security Response/
  3. Backdoor.Apdoor


Risk Level 1: Very Low

June 4, 2003
February 13, 2007 12:02:25 PM
Also Known As:
CoreFlood [McAfee], Backdoor.Apdoor.b [KAV]
Trojan Horse
Systems Affected:

Backdoor.Apdoor is a Backdoor Trojan Horse that is similar to Backdoor.Coreflood. It allows unauthorized remote access to the system on which it is running and supports the commands to modify the registry settings, transfer files, and start or end processes.

A sign of possible infection is the existence of two files in the %System% folder. These files will be in the following format:
  • ABCDEFG.exe (28160 bytes)
  • ABCDEFG.dll (69632 bytes)
The actual filenames that the Trojan uses are random.

Antivirus Protection Dates

  • Initial Rapid Release version June 4, 2003
  • Latest Rapid Release version March 3, 2008 revision 035
  • Initial Daily Certified version June 4, 2003
  • Latest Daily Certified version March 3, 2008 revision 037
  • Initial Weekly Certified release date June 4, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Heather Shannon

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