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In the wild:
Method of propagation:
• Symantec: W32.Netsky.Z@mm
• Mcafee: W32/Netsky
• Kaspersky: Email-Worm.Win32.NetSky.aa
• TrendMicro: WORM_NETSKY.Z
• F-Secure: W32/Netsky.AK@mm
• Grisoft: I-Worm/Netsky.Z
• VirusBuster: I-Worm.NetSky.Z1
• Bitdefender: Win32.Netsky.AA@mm
Platforms / OS:
• Windows 95
• Windows 98
• Windows 98 SE
• Windows NT
• Windows ME
• Windows 2000
• Windows XP
• Windows 2003
• Uses its own Email engine
• Registry modification
It copies itself to the following location:
The following files are created:
– It creates the following archive containing a copy of the malware:
– MIME encoded copies of itself:
The following registry key is added in order to run the process after reboot:
It contains an integrated SMTP engine in order to send emails. A direct connection with the destination server will be established. The characteristics are described in the following:
The sender address is spoofed.
Generated addresses. Please do not assume that it was the sender's intention to send this email to you. He might not know about his infection or might not even be infected at all. Furthermore it is possible that you will receive bounced emails telling you that you are infected. This might also not be the case.
– Email addresses found in specific files on the system.
– Email addresses gathered from WAB (Windows Address Book)
The recipient of the email is the following:
One of the following:
The body of the email is one of the lines:
• Important bill!
• Important data!
• Important details!
• Important document!
• Important informations!
• Important notice!
• Important textfile!
The filename of the attachment is one of the following:
It searches the following files for email addresses:
• .ppt; .xml; .wsh; .jsp; .msg; .oft; .sht; .nch; .mmf; .mht; .dbx;
.tbb; .adb; .xls; .stm; .ods; .dhtm; .cgi; .shtm; .uin; .rtf; .vbs;
.php; .txt; .eml; .doc; .wab; .asp; .html; .htm; .pl; .mdx; .mbx; .cfg
Resolving server names:
If the request using the standard DNS fails it continues with the following
It has the ability to contact the following DNS servers:
• 188.8.131.52; 184.108.40.206; 220.127.116.11; 18.104.22.168;
22.214.171.124; 126.96.36.199; 188.8.131.52; 184.108.40.206;
220.127.116.11; 18.104.22.168; 22.214.171.124; 126.96.36.199;
188.8.131.52; 184.108.40.206; 220.127.116.11; 18.104.22.168;
22.214.171.124; 126.96.36.199; 188.8.131.52; 184.108.40.206;
The following port is opened:
on TCP port 665 in order to provide backdoor capabilities.
On 02/05/2004 it performs DoS attacks against the following destinations:
It creates the following Mutex:
Furthermore it contains the following string:
• :::::::::::They never learn it!:::::::::::
The malware program was written in MS Visual C++.
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
• ASPack 2.11c
Description inserted by Razvan Olteanu on Monday, August 29, 2005
Description updated by Andrei Ivanes on Tuesday, March 14, 2006