After the worm's file is started by a user, it drops a randomly named file into the same folder where it was started from and runs it. This file installs a rootkit and p2p (peer-to-peer) component into the Windows System folder. The file name is wincom32.sys. The following startup key is created in the Registry for the dropped file:

[HKLMSystemControlSet001Serviceswincom32]
@ = "%WinSysDir%wincom32.sys"

The installed component has rootkit features: it hides its Registry keys and active process so that an anti-rootkit engine is needed to reveal them. In addition this component drops a text file named wincom32.ini into the Windows System folder. This file contains a list of clients for the worm's peer-to-peer network. The peer names and access ports are encoded. Here's an example of the file's contents:

[counter]
Counter=0
[peers]
003964D3640550573F800125725481EF=5326859A123900
004982069E5DB75721B54CFF33A26170=5955FC93123900
00A1836AE91D076BC265F9735204714F=451AAE831EBF00

The dropped file also has a blacklist area, but it's empty at the moment. The worm decodes the clients' addresses and access ports and connects itself to the peer-to-peer network. A significant number of UDP connections can be observed when the worm is trying to connect to its p2p network.

At the same time the worm's copy that stays in memory, starts its spreading cycle. It creates a mutex named klllekkdkkd and scans files on local hard disks for victims' e-mail addresses. The worm ignores e-mail addresses if they contain any of the following substrings:

• microsoft
• .gov
• .mil

Then the worm starts to spread in e-mails. It sends messages with the following subjects to all found e-mail addresses:

• USA Declares War on Iran
• USA Missle Strike: Iran War just have started
• Missle Strike: The USA kills more then 20000 Iranian citizens
• Missle Strike: The USA kills more then 1000 Iranian citizens
• Missle Strike: The USA kills more then 10000 Iranian citizens
• Israel Just Have Started World War III
• USA Just Have Started World War III
• Iran Just Have Started World War III

As you see, the subjects are war-related, so it's a good social engineering trick. The worm always attaches itself to the e-mails that it sends out. The attachment names can be any of the following:

• More.exe
• Read More.exe
• Click Here.exe
• Click Me.exe
• Read Me.exe
• Movie.exe
• News.exe
• Video.exe

When a recipient of such e-mail opens the attachment, his/her computer becomes infected and the worm continues its spreading cycle.

The worm has a payload. It kills processes if they have the following substrings in their names:

• mcafee
• taskmgr
• hijack
• f-pro
• lockdown
• msconfig
• firewall
• blackice
• avg
• vsmon
• zonea
• spybot
• nod32
• reged
• rav
• nav
• avp
• troja
• viru
• anti

Last update 09 April 2007

 

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