Worm/Netsky.D.Dam - Worm

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Full description

Virus:	Worm/Netsky.D.Dam
Date discovered:	01/03/2004
Type:	Worm
In the wild:	Yes
Reported Infections:	Medium to high
Distribution Potential:	Medium
Damage Potential:	Low
Static file:	Yes
File size:	17.424 Bytes
MD5 checksum:	6f49434d7e4532520372a4721a7a9aec
VDF version:	6.24.00.29

General Method of propagation:
   • Email

Aliases:
   • Symantec: W32.Netsky.D@mm
   • Mcafee: W32/Netsky.d@MM
   • Kaspersky: Email-Worm.Win32.NetSky.d
   • TrendMicro: WORM_NETSKY.DAM
   • F-Secure: W32/Netsky.D@mm non-working
   • Sophos: W32/NetskyD-Dam
   • Grisoft: I-Worm/Netsky
   • VirusBuster: I-Worm.Netsky.D3
   • Eset: Win32/Netsky.D
   • Bitdefender: Win32.Netsky.D@mm

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows 2000
   • Windows XP

Side effects:
   • Uses its own Email engine
   • Lowers security settings
   • Registry modification

Files It copies itself to the following location:
• %WINDIR%\winlogon.exe

Registry The following registry key is added in order to run the process after reboot:

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   • "ICQ Net"=%WINDIR%\winlogon.exe -stealth"

The values of the following registry keys are removed:

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   • DELETE ME
   • Explorer
   • KasperskyAv
   • msgsvr32
   • Sentry
   • service
   • system.
   • Taskmon
   • Windows Services Host

– HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   • au.exe
   • d3dupdate.exe
   • Explorer
   • KasperskyAv
   • OLE
   • Taskmon
   • Windows Services Host

The following registry keys including all values and subkeys are removed:
   • HKCR\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InProcServer32
   • HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\PINF
   • HKLM\System\CurrentControlSet\Services\WksPatch

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:

From:
The sender address is spoofed.

To:
– Email addresses found in specific files on the system.

Subject:
One of the following:
   • Re: Approved; Re: Details; Re: Document; Re: Excel file; Re: Hello;
      Re: Here; Re: Here is the document; Re: Hi; Re: My details; Re: Re:
      Document; Re: Re: Message; Re: Re: Re: Your document; Re: Re: Thanks!;
      Re: Thanks!; Re: Word file; Re: Your archive; Re: Your bill; Re: Your
      details; Re: Your document; Re: Your letter; Re: Your music; Re: Your
      picture; Re: Your product; Re: Your software; Re: Your text; Re: Your
      website

Body:
The body of the email is one of the lines:
   • Your file is attached.
   • Please read the attached file.
   • Please have a look at the attached file.
   • See the attached file for details.
   • Here is the file.
   • Your document is attached.

Attachment:
The filename of the attachment is one of the following:
   • all_document.pif; application.pif; document.pif; document_4351.pif;
      document_excel.pif; document_full.pif; document_word.pif;
      message_details.pif; message_part2.pif; mp3music.pif; my_details.pif;
      your_archive.pif; your_bill.pif; your_details.pif; your_document.pif;
      your_file.pif; your_letter.pif; your_picture.pif; your_product.pif;
      your_text.pif; your_website.pif; yours.pif

The attachment is a copy of the malware itself.

The email looks like the following:

Mailing Search addresses:
It searches the following files for email addresses:
   • .adb; .asp; .cgi; .dbx; .dhtm; .doc; .eml; .htm; .html; .msg; .oft;
      .php; .pl; .rtf; .sht; .shtm; .tbb; .txt; .uin; .vbs; .wab

Avoid addresses:
It does not send emails to addresses containing one of the following strings:
   • abuse; antivi; aspersky; avp; cafee; fbi; f-pro; f-secur; icrosoft;
      itdefender; messagelabs; orman; orton; skynet; spam; ymantec

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:
   • 145.253.2.171; 151.189.13.35; 193.141.40.42; 193.189.244.205;
      193.193.144.12; 193.193.158.10; 194.25.2.129; 194.25.2.130;
      194.25.2.131; 194.25.2.132; 194.25.2.133; 194.25.2.134;
      195.185.185.195; 195.20.224.234; 212.185.252.136; 212.185.252.73;
      212.185.253.70; 212.44.160.8; 212.7.128.162; 212.7.128.165;
      213.191.74.19; 217.5.97.137; 62.155.255.16

Miscellaneous Mutex:
It creates the following Mutex:
• [SkyNet.cz]SystemsMutex

String:
Furthermore it contains the following string:
• "be aware! Skynet.cz - -->AntiHacker Crew<--"

See a brief description here.

Inserted by Irina Boldea on Tue, 30 Aug 2005 10:19 (GMT+1)
Updated by Irina Boldea on Thu, 01 Sep 2005 13:47 (GMT+1)

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Worm/Netsky.D.Dam - Worm

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