Virus:TR/Zapchas.F
Date discovered:17/11/2005
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:912.374 Bytes
MD5 checksum:d9696ca9402f9303ad63d45bf48dd320
VDF version:6.32.00.190

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  F-Secure: Backdoor.IRC.Zapchast
   •  Sophos: Troj/Zapchas-CN
   •  Grisoft: IRC/BackDoor.Flood


Platforms / OS:
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops files
   • Drops malicious files
   • Registry modification

 Files  It creates the following directories:
   • %SYSDIR%\download
   • %SYSDIR%\logs
   • %SYSDIR%\sounds



The following files are created:

– %SYSDIR%\fullname.txt
– %SYSDIR%\ident.txt
– %SYSDIR%\nicks.txt
– %SYSDIR%\popups.txt
– %SYSDIR%\svchost.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: W32/Parite

– %SYSDIR%\script.ini Further investigation pointed out that this file is malware, too. Detected as: IRC/Zapchast.M

– %SYSDIR%\mirc.ini
– %SYSDIR%\remote.ini
– %SYSDIR%\sup.bat
– %SYSDIR%\servers.ini
– %SYSDIR%\aliases.ini
– %SYSDIR%\control.ini
– %SYSDIR%\users.ini
– %SYSDIR%\mirc.ico
– %SYSDIR%\sup.reg

 Registry The following registry key is added in order to run the process after reboot:

– [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
   • "GNP Generic Host Process"="%SYSDIR%\svchost.exe"



The following registry key is added:

– [HKCU\Software\WinRAR SFX]
   • "C%%WINDOWS%system%"="%SYSDIR%\"

Description inserted by Adriana Popa on Monday, December 4, 2006
Description updated by Adriana Popa on Monday, December 4, 2006

Back . . . .