Parent class: TrojWare
Trojans are malicious programs that perform actions which are not authorized by the user: they delete, block, modify or copy data, and they disrupt the performance of computers or computer networks. Unlike viruses and worms, the threats that fall into this category are unable to make copies of themselves or self-replicate. Trojans are classified according to the type of action they perform on an infected computer.Class: Trojan
A malicious program designed to electronically spy on the user’s activities (intercept keyboard input, take screenshots, capture a list of active applications, etc.). The collected information is sent to the cybercriminal by various means, including email, FTP, and HTTP (by sending data in a request).Read more
Platform: Win32
Win32 is an API on Windows NT-based operating systems (Windows XP, Windows 7, etc.) that supports execution of 32-bit applications. One of the most widespread programming platforms in the world.Description
Technical Details
This is a virus-worm that spreads via the Internet by using AOL client. The worm itself is a Win32 application (PE EXE file) about 86K in size, and is written in VisualBasic 6.0.
The worm arrives as a SOFUNNY.EXE file attached to an e-mail message that has one of two Subjects and the same Body:
Subject1: Fwd: This is great! =)
Subject2: Fwd: This is hilarious! =)
Body: You guys have to download this! This really is funny!
To spread, the worm waits until AOL client is active, manipulates the AOL functions, gains access to in-box e-mails, and replies to them with an infected messages (note: this has not tested in the Lab).
The worm also has password-stealing ability, and sends AOL-login and passwords from infected computers to its host.
When the worm is run (from infected message), it displays a fake error message:
Fatal Error #6834
An unknown error has occurred.
The worm then copies itself to the Windows directory exactly as follows:
C:WINDOWSmsdos423.exe
C:WINDOWSSOFUNNY.exe
One of these files is then registered in the auto-run registry key:
HKLMSOFTWAREMicrosoftWindowsCurrentVersionRun msdos423 = c:windowsmsdos423.exe
The worm also creates an additional file, C:WINDOWSmsdos423.ini, and stores itself in there, for example:
[Setup]
Copied = True
Sent = True
Uploaded = True
The worm also contains the "copyright" text strings:
AOL PWS for version 4, 5, & 6. Now a worm too! By Menace
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