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1.Impact:
Possible theft of data via download, upload of files,
execution of files
and reboot the targeted machine.
2.Detailed Information:
This Trojan affects the following operating systems:
Windows 95
Windows 98
Windows ME
The Trojan changes system registry settings to add the
Backconstruction
sever to programs normally started on boot. Due to the nature of
this
Trojan it is unlikely that the attacker's client IP address has
been
spoofed.
3.Attack Scenarios:
This Trojan may be delivered to the target in a number of
ways. This
event is indicative of an existing infection being activated.
Initial
compromise can be in the form of a Win32 installation program
that may
use the extension ".jpg" or ".bmp" when delivered via e-mail for
example.
4.Ease of Attack:
This is Trojan activity, the target machine may already be
compromised.
Updated virus definition files are essential in detecting this
Trojan.
The Trojan server is located at <drive>:\WINDOWS\Cmctl32.exe
5.Corrective Action:
Edit the system registry to remove the extra keys or restore a
previously known good copy of the registry.
Affected registry keys are:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\
Registry keys added are:
Shell = "<drive>:\WINDOWS\Cmctl32.exe"
Removal of this entry is required.
Delete the file <drive>:\WINDOWS\Cmctl32.exe
Ending the Trojan process is also necessary. A reboot of the
infected
machine is recommended. |
