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Virus:Worm/Small.AG.1
Date discovered:15/11/2007
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low
Static file:Yes
File size:26.309 Bytes
MD5 checksum:093a41ac3cf276b9ff0Ace9fb4b13383
IVDF version:7.00.00.221 - Thursday, November 15, 2007

 General Method of propagation:
   • Mapped network drives


Aliases:
   •  Mcafee: W32/Autorun.worm.bc
   •  Kaspersky: Worm.Win32.Small.ag
   •  F-Secure: Worm.Win32.Small.ag
   •  Grisoft: Agent.GLY
   •  Eset: Win32/Small.AG
   •  Bitdefender: Win32.Worm.Acimex.A


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
    Access to floppy disk
   • Registry modification


Right after execution the following information is displayed:


 Files It copies itself to the following locations:
   • %WINDIR%\system234.exe
   • %TEMPDIR%\mexica.exe
   • %SYSDIR%\mexica.exe
   • %drive%:\imagenes.exe

 Registry The following registry keys are added in order to run the processes after reboot:

[HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows]
   • run = %TEMPDIR%\mexica.exe

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • systray = %WINDIR%\system234.exe



The following registry key is changed:

[HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Old value:
   • shell = Explorer.exe
   New value:
   • shell = Explorer.exe %SYSDIR%\mexica.exe

Description inserted by Andrei Gherman on Friday, June 20, 2008
Description updated by Andrei Gherman on Friday, June 20, 2008

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