Virus Database

I-Worm.Jer

Description I-Worm.Jer

This is an Internet worm that spreads through IRC channels and also intends to spread via e-mail, but fails because of bugs in its code.
Installation
The worm has been placed by its author on a page on the www.geocities.com. The page has the title:
"<< THE 40 WAYS WOMEN FAIL IN BED".
On 2 July 2000, the info about this page was announced to IRC channels and there were more than 1000 hits on that page for the first day. Fortunately, the worm had a bug in its e-mail infection routine, and it didn't spread too far.
The "Jer" worm uses a primitive, but very effective way of penetrating computers. A Web site contains a script-program (the worm itself), which is automatically executed after a user opens an infected HTML page. Then a user receives a warning from the system whether to accept this unknown script or not. This method exploits so-called "mind breaches": to avoid this annoying message, a user will answer "yes". Right after this moment, the worm will be passed on to the computer.

The infected HTML page contains the VBS script in its body. Upon opening that page, the script automatically is executed and the worm gains control. It creates a copy of the infected HTML page in the Windows system directory with the JER.HTM name and registers it in the system registry in the autostart section:
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunGinSenG = "JER.HTM"
As a result, the worm will be automatically executed on each Windows startup.
Spreading
The worm then goes to the C:MIRC directory and (if such a directory exists) creates a "SCRIPT.INI" file that contains the commands for the mIRC client. The worm writes to this file a set of commands to send an infected JER.HTM file to every computer that connects to the same channel as the infected computer. Additionally, this script provides access to the local disk of the infected computer to the IRC user who has typed a specified script keyword.
Payload
The worm makes some more changes in the system registry:
Disables desktop
Disables "Find" dialog box
Disables network properties dialog box
Removes "Shut Down" from "Start" menu
The worm also changes the Windows registration information:
Owner: I Love You, Min
Organization: GinsengBoy- 2000
Removal
To restore system settings, the original registry values have to be restored.
NOTE: It is recommended that only experienced users fix the Registry keys by using the Registry Editor. Incorrect access can cause serious problems that may require you to reinstall Windows. For information about how to edit the registry, view the Changing Keys And Values online Help topic in the Registry Editor (REGEDIT.EXE).
The following keys have to be removed from the registry:
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunGinSenG
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerNoDesktop
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerNoFind
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionPoliciesNetworkNoNetSetup
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerNoClose
The following keys have to be changed to proper values:
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionVersion - Windows version (for example "Windows 98").
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRegisteredOwner - User name (Windows registered to)
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRegisteredOrganization - Organization name (Windows registered to)

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Corrupt.1033

Description Corrupt.1033

It is not a dangerous nonmemory resident parasitic virus. It searches for COM files, then writes itself to the beginning of the file. When an infected file is executed on a floppy drive, the virus displays the blue and red colored message:
COR-
RUPT
VIRUS

The virus contains the text strings:
C0RrUpT bY CiBeRb0B
*.com

Cossiga.883.a

Description Cossiga.883.a

These are not memory resident parasitic viruses. They search for .EXE-files and write themselves to their ends.
"Cossiga.883, 883.b" are not dangerous, they display the message:
COSSIGA ?! NO GRAZIE!
By Amissi dee Panoce (c) 1991 PADOVA

They contain the internal texts also:
"Cossiga.883": AEGE/B V 1.2
"Cossiga.883.b": CLAUDIA SCHIFFER TO P MODEL - COSSIGA VIRUS AEGE/B

"Cossiga.859" is dangerous virus, depending on the system timer it erases disk sectors and displays:
TE LO SEI PRESO NEL CULO !

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