I-Worm.Pauko
Details
I-Worm.Paukor
This is a virus-worm that spreads via the Internet attached to infected e-mails. The worm itself is a Windows PE EXE file about 450Kb in length, and is written in Delphi. The worm has several components (main and additional) described below.
The infected messages have an attached FILES.EXE file (the worm itself), and have different text fields that are randomly selected by the worm from several variants (see below).
The first and last lines in the message body are:
first line in Body is randomly selected from “Hi!” or “Hello,”
the last line in Body is also randomly selected from empty line, or
“Regards,”
“Your friend,”
“Best Regards”
“Kind Regards”
and is completed with %UserEmailName% (user’s display name in email messages)
The Subject and Body variants are:
Subject: Your loved one in indecent pictures 
Body:
Hi! or Hello,
I’m sorry I have to send you these compromising pictures with the one you love, or you loved. You will know where they were taken as soon as you see them.
I’ compressed it as a self extracting archive because I din’t knew if you have WinZip. When you run it, it should display the extract dialog. I’m really sorry I had to be the one who told you about this.
Regards, or Your friend, or Best Regards or Kind Regards
Subject: Surprise for you!
Body:
Hi! or Hello,
I have a surprise for you. It’s a electronic card made by myself :). It contains some graphics and sound and I had to compress it as self extracting archive. :))
I hope you like it, please see the attached file.
Regards, or Your friend, or Best Regards or Kind Regards
Subject: Pictures from the last party
Body:
Hi! or Hello,
Here are the pictures from the last party. Some of them are so funny! I compressed them as self extracting archive as they were too large, over 2.1 Mb! :))
I made the archive self extracting, because I din’t knew if you have WinZip. When you run it, it should display the extract dialog.
Please let me know what you think. 
Regards, or Your friend, or Best Regards or Kind Regards
Subject: No subject
Body:
Hi! or Hello,
Here are some files related to what we have talk about.
I made the archive self extracting, because I din’t knew if you have WinZip. When you run it, it should display the extract dialog.
Please let me know what you think.
Regards, or Your friend, or Best Regards or Kind Regards
The worm is activated from an infected e-mail only when a user clicks on an attached file. The worm then installs itself to the system, drops additional components and runs a spreading routine.
Main Component
When the main worm component, FILES.EXE, is executed, the worm installs its other components in the system. These components are created in the Windows directory with the following names:
SYSTRAY.EXE - 66K of length
CWAB.EXE - 341K of length
MSP.DLL - 20K of length
All are Windows PE EXE files and are written in Delphi, as is the main worm file. The EXE files (SYSTRAY.EXE and CWAB.EXE) are executed then by the main worm component. The worm’s main component then copies itself (the FILES.EXE file) to the Windows directory, displays a “decoy” message and exits. The message appears as follows:
The CWAB Component
This the worm component, that when run, spreads the worm with e-mail and sends e-mail with a keylog file to the worm host (with an e-mail address at @yahoo.com and @softhome.com).
While sending e-mails, the worm obtains a victim’s e-mail addresses from the WAB (Windows Address Book) database, connects to a SMTP server, and sends infected e-mail messages.
This worm component is designed for being run only under the main FILES.EXE worm file. Being run as a stand-alone application, it simply displays the following fake message and exits:
The SYSTRAY and MSP Components
This is a “keylogger” worm component. When run, it registers itself in the registry auto-run key:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
then activates the “key-logging” library MSP.DLL, which logs keyboard strokes to a MSP.DAT file in the Windows directory. This file is then sometimes sent to a host e-mail address.
This worm’s component has the following “copyright” text strings in it:
PayK Worm
Copyright (c) 2001 by TheShadow
Disclamer: This program has been made for educational and research purposes only.
Related Posts