Type: Worm In the wild: Yes Reported Infections: Low Distribution Potential: Low Damage Potential: Medium Static file: Yes File size: 27.648 Bytes MD5 checksum: 301b39b3e6aafb7cae5a9d84e1c78cf6
General Method of propagation: • Email Aliases: • Mcafee: W32/Netsky.k • Sophos: W32/Netsky-K • Panda: W32/Netsky.K.worm • Eset: Win32/Netsky.K • Bitdefender: Win32.Generic.495186 Platforms / OS: • Windows 2000 • Windows XP • Windows 2003 Side effects: • Drops malicious files • Uses its own Email engine • Registry modification Files It copies itself to the following location: • %WINDIR% \avpguard.exe Registry One of the following values is added in order to run the process after reboot: – [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] • "My AV"="%WINDIR% \avpguard.exe -av serv" Email 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: It uses the Messaging Application Programming Interface (MAPI) in order to send emails. The characteristics are further described: From: The sender address is spoofed. To: – Email addresses found in specific files on the system. – Email addresses gathered from WAB (Windows Address Book) Subject: One of the following: • Hi %username from receiver's email address% , your product; Hello %username from receiver's email address% , your letter; Re: Hi %username from receiver's email address% , your archive; Re: %username from receiver's email address% , your text; Re: Hello %username from receiver's email address% , your bill; Re: Hi %username from receiver's email address% , your details; Re: Hello %username from receiver's email address% , my details; Re: Hi %username from receiver's email address% , your word file; Re: Hello %username from receiver's email address% , your excel file; Re: Hi %username from receiver's email address% , details; Re: Hello %username from receiver's email address% , Approved; Re: Hello %username from receiver's email address% , your software; Re: Hi %username from receiver's email address% , your music; Re: Dear %username from receiver's email address% , Here; Re: Re: Re: Hello %username from receiver's email address% , your document; Re: Hi %username from receiver's email address% ; Re: Dear %username from receiver's email address% , Hi; Re: Re: Hi %username from receiver's email address% , your message; Re: Here %username from receiver's email address% , your picture; Re: Hi %username from receiver's email address% , here is the document; Re: Hello %username from receiver's email address% , your document; Re: %username from receiver's email address% , thanks!; Re: Re: %username from receiver's email address% , thanks!; Re: Re: Hi %username from receiver's email address% , document; Re: Hello %username from receiver's email address% , document; www.%character string% .freepage.com, your website; Na %username from receiver's email address% ; Best %username from receiver's email address% ; Love %username from receiver's email address% ; Good morning %username from receiver's email address% ; Have a good day %username from receiver's email address% ; Dear %username from receiver's email address% ; To %username from receiver's email address% , it's me; Welcome %username from receiver's email address% ; Moin %username from receiver's email address% ; Hello %username from receiver's email address% ; Your account %username from receiver's email address% is expired!; Hey %username from receiver's email address% ; Hi %username from receiver's email address% ; Hi Mr. %username from receiver's email address% ; Moi %username from receiver's email address% ; He %username from receiver's email address% ; Yours faithfully, %username from receiver's email address% ; Message to %username from receiver's email address% ; Hi Mrs. %username from receiver's email address% ; Is %username from receiver's email address% .doc yours?; Is %username from receiver's email address% .xls yours?; Whats up %username from receiver's email address% ; Hi; Your product; Your letter; Re: corrected homework; Re: I've found your document; Re: Your bill; Re: hello again; Re: hi again; Re: part 3; Re: important document part 2; Re: important; Re: Your data; Re: Your application; Re: your music; Re: excel document; Re: Re: Re: word document; Re: Your details; Re: My details; Re: Your requested file; Re: Read it immediately; Re: Approved; Re: Your software; Re: my memberlist; Re: Your document; Re: Your file; Re: Your important document The body of the email is one of the lines: • My details are in the attached file. • I have corrected your document. • Please do not forget to read the important document. • I have an interesting document about you. • The sample is attached. • Your personal document is attached. • Your file is attached to this mail. • Note that I have attached your file. • The important document is attached. • Please read the document. It's important. • Your document is attached to this mail. • See the attachment for further details. • Your file is attached. Use this password for the file: %character string% . • Please read the attached file. Password for the file is %character string% . • Please have a look at the attached file. Password for decrypting is %character string% . • See the attached file for details. Password is %character string% . • Here is the file. My password is %character string% . • Your document is attached. Your password is %character string% . Attachment: The filename of the attachment is one of the following: • website_%character string% .pif; your_product_%character string% .pif; letter_%character string% .pif; archive%character string% .pif; your_text%character string% .pif; bill_%character string% .pif; your_details%character string% .pif; %character string% _details.pif; %character string% _document_word.pif; %character string% _document_excel.pif; %character string% _my_details.pif; %character string% _all_document.pif; %character string% _application.pif; mp3music_%character string% .pif; yours%character string% .pif; document_%character string% 4351.pif; %character string% _picture.pif; %character string% _file.pif; %character string% _message_details.pif; yourpicture%character string% .pif; %character string% _document_full.pif; %character string% _your_message_part2.pif; %character string% information.pif; %character string% document.pif; %character string% _your_document.pif The attachment is a copy of the malware itself. Mailing Search addresses: It searches the following files for email addresses: • .xml; .wsh; .jsp; .dhtm; .cgi; .shtm; .msg; .oft; .sht; .dbx; .tbb; .adb; .doc; .wab; .asp; .uin; .rtf; .vbs; .html; .htm; .pl; .php; .txt; .eml Miscellaneous String: Furthermore it contains the following strings: • Please remove the file avpguard.exe from your Windows-Directory and do not open attachments anymore. It can be a virus like bagle and mydoom or similar malicios code. This is the Skynet-Antivirus! • SkyNet has the full control of your system now File details Runtime packer: In order to aggravate detection and reduce size of the file it is packed with a runtime packer.
Description inserted by Petre Galan on Friday, March 5, 2010 Description updated by Petre Galan on Monday, March 8, 2010
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