Sophos

W32/Dozic-A

Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Chat programs
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from August 2006 (4.08)
Protection available since 12 July 2006 05:22:05 (GMT)
Detected by All Sophos products

Action

More Information

W32/Dozic-A is a worm for the Windows platform. W32/Dozic-A attempts to spread via AOL Instant Messenger. W32/Dozic-A is a worm for the Windows platform. W32/Dozic-A attempts to spread via AOL Instant Messenger.

When first run W32/Dozic-A copies itself to <Startup>\WinZod32.exe, <System>\zod32.exe and may create the following files:

<Program Files>\aol\info.htm
<Windows>\wininit.ini

These files are harmless and may be deleted.

The following registry entry is created to run code exported by zod32.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ ShellServiceObjectDelayLoad
winup
<System>\zod32.exe

Registry entries are set as follows:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Winupd
<System>\zod32.exe

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit
winndata
<System>\zod32.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run
windatea
<System>\zod32.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run
winnet
<System>\zod32.exe

Registry entries are created under:

HKCU\Control Panel\Desktop\
HKCR\JSEFile\Shell\Open\Command\
HKCR\JSFile\Shell\Open\Command\
HKCR\VBEFile\Shell\Open\Command\
HKCR\VBSFile\Shell\Open\Command\
HKCR\WSFFile\Shell\Open\Command\
HKCR\WSHFile\Shell\Open\Command\
HKCR\batfile\shell\open\command\
HKCR\comfile\shell\open\command\
HKCR\exefile\shell\open\command\
HKCR\piffile\shell\open\command\
HKCR\scrfile\shell\open\command\
HKLM\SYSTEM\Control\WOW\cmdline\
HKLM\SYSTEM\Control\WOW\wowcmdline\

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