Marianna
February 13th, 2004, 08:25 PM
Date Discovered: 2/13/2004
Date Added: 2/13/2004
Origin: Unknown
Length: 24,576 bytes
Type: Virus
SubType: E-mail
This is a mass-mailing and peer-to-peer file-sharing worm that bears the following characteristics:
contains its own SMTP engine to construct outgoing messages
contains a backdoor component (see below)
contains a Denial of Service payload
The virus arrives in an email message as follows:
From: (Spoofed email sender)
Do not assume that the sender address is an indication that the sender is infected. Additionally you may receive alert messages from a mail server that you are infected, which may not be the case.
Subject: (Varies, such as)
Error
Status
Server Report
Mail Transaction Failed
Mail Delivery System
hello
hi
Body: (Varies, such as)
The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.
The message contains Unicode characters and has been sent as a binary attachment.
Mail transaction failed. Partial message is available.
test
Attachment: (varies [.bat, .exe, .pif, .cmd, .scr] - often arrives in a ZIP archive)
examples (common names, but can be random)
doc.bat
document.zip
message.zip
readme.zip
text.pif
body.scr
test.htm.pif
data.txt.exe
file.scr
The icon used by the file tries to make it appear as if the attachment is a text file:
http://vil.nai.com/images/100983icn.gif
When this file is run (manually), it copies itself to the WINDOWS SYSTEM directory as taskmon.exe
%SysDir%\taskmon.exe
(Where %Sysdir% is the Windows System directory, for example C:\WINDOWS\SYSTEM)
It creates the following registry entry to hook Windows startup:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\Run "TaskMon" = %SysDir%\taskmon.exe
The virus uses a DLL that it creates in the Windows System directory:
%SysDir%\shimgapi.dll (5,632 bytes)
(Note: The DLL is detected with 4321 DATs and higher as a variant of W32/Mydoom. The 4324 DATs will add specific detection as W32/Mydoom.e.dll)
This DLL is injected into the EXPLORER.EXE upon reboot via this registry key:
HKEY_CLASSES_ROOT\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InProcServer32 "(Default)" = %SysDir%\shimgapi.dll
Peer To Peer Propagation
The worm copies itself to the KaZaa Shared Directory with the following filenames:
nuke2004
office_crack
rootkitXP
strip-girl-2.0bdcom_patches
activation_crack
icq2004-final
winamp
****
The virus will not replicate on the 12th February or later (although the DLL will still be installed).
Remote Access Component
The worm (this functionality is in the dropped DLL) opens a connection on TCP port 3127 (if that fails it opens next available port up to port 3198). The worm can accept specially crafted TCP transmissions.
On receipt of one kind of such a transmission it will save the embedded binary into a temporary file and execute it. Then the temporary file is deleted.
On receipt of another kind it can relay TCP packets thus providing IP spoofing capabilities (possibly to facilitate SPAM distribution)
Denial of Service Payload
If the worm is run after February 1st 16:09:18 (UTC), it changes its behavior from mass mailing to initiating a denial of service attack against www.sco.com. This denial of service attack will stop on the first system startup after February 12th 02:28:57 (UTC) , and thereafter the worm's only behavior is to continue listening on TCP port 3127 (or up to 3198). Due to a bug in the code, the DoS attack will fail to start 75% of the time.
The denial of service executes by creating 64 threads each of which makes a HTTP GET request from random ports on the infected machines to port 80 of www.sco.com .
****
http://us.mcafee.com/virusInfo/default.asp?id=description&virus_k=101024
Date Added: 2/13/2004
Origin: Unknown
Length: 24,576 bytes
Type: Virus
SubType: E-mail
This is a mass-mailing and peer-to-peer file-sharing worm that bears the following characteristics:
contains its own SMTP engine to construct outgoing messages
contains a backdoor component (see below)
contains a Denial of Service payload
The virus arrives in an email message as follows:
From: (Spoofed email sender)
Do not assume that the sender address is an indication that the sender is infected. Additionally you may receive alert messages from a mail server that you are infected, which may not be the case.
Subject: (Varies, such as)
Error
Status
Server Report
Mail Transaction Failed
Mail Delivery System
hello
hi
Body: (Varies, such as)
The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.
The message contains Unicode characters and has been sent as a binary attachment.
Mail transaction failed. Partial message is available.
test
Attachment: (varies [.bat, .exe, .pif, .cmd, .scr] - often arrives in a ZIP archive)
examples (common names, but can be random)
doc.bat
document.zip
message.zip
readme.zip
text.pif
body.scr
test.htm.pif
data.txt.exe
file.scr
The icon used by the file tries to make it appear as if the attachment is a text file:
http://vil.nai.com/images/100983icn.gif
When this file is run (manually), it copies itself to the WINDOWS SYSTEM directory as taskmon.exe
%SysDir%\taskmon.exe
(Where %Sysdir% is the Windows System directory, for example C:\WINDOWS\SYSTEM)
It creates the following registry entry to hook Windows startup:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\Run "TaskMon" = %SysDir%\taskmon.exe
The virus uses a DLL that it creates in the Windows System directory:
%SysDir%\shimgapi.dll (5,632 bytes)
(Note: The DLL is detected with 4321 DATs and higher as a variant of W32/Mydoom. The 4324 DATs will add specific detection as W32/Mydoom.e.dll)
This DLL is injected into the EXPLORER.EXE upon reboot via this registry key:
HKEY_CLASSES_ROOT\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InProcServer32 "(Default)" = %SysDir%\shimgapi.dll
Peer To Peer Propagation
The worm copies itself to the KaZaa Shared Directory with the following filenames:
nuke2004
office_crack
rootkitXP
strip-girl-2.0bdcom_patches
activation_crack
icq2004-final
winamp
****
The virus will not replicate on the 12th February or later (although the DLL will still be installed).
Remote Access Component
The worm (this functionality is in the dropped DLL) opens a connection on TCP port 3127 (if that fails it opens next available port up to port 3198). The worm can accept specially crafted TCP transmissions.
On receipt of one kind of such a transmission it will save the embedded binary into a temporary file and execute it. Then the temporary file is deleted.
On receipt of another kind it can relay TCP packets thus providing IP spoofing capabilities (possibly to facilitate SPAM distribution)
Denial of Service Payload
If the worm is run after February 1st 16:09:18 (UTC), it changes its behavior from mass mailing to initiating a denial of service attack against www.sco.com. This denial of service attack will stop on the first system startup after February 12th 02:28:57 (UTC) , and thereafter the worm's only behavior is to continue listening on TCP port 3127 (or up to 3198). Due to a bug in the code, the DoS attack will fail to start 75% of the time.
The denial of service executes by creating 64 threads each of which makes a HTTP GET request from random ports on the infected machines to port 80 of www.sco.com .
****
http://us.mcafee.com/virusInfo/default.asp?id=description&virus_k=101024