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Worm:ACAD/Kenilfe.A


Worm:ACAD/Kenilfe.A
التوقيت الحالي : 10-01-2022, 10:16 AM
مستخدمين يتصفحوا هذا الموضوع: 1 ضيف
الكاتب: dr.wolf
آخر رد: dr.wolf
الردود : 0
المشاهدات : 2679

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Worm:ACAD/Kenilfe.A

الكاتب الموضوع

رقم العضوية :3
الاقامة : ام الدنيا
التواجد : غير متصل
معلومات العضو
المشاركات : 7,392
الإنتساب : Oct 2010
السمعة : 5


بيانات موقعي اسم الموقع : سكيورتي العرب
اصدار المنتدى : 1.6.8

مشاركات : #1
Worm:ACAD/Kenilfe.A

Worm:ACAD/Kenilfe.A


Worm:ACAD/Kenilfe.A



Name : Worm:ACAD/Kenilfe.A
Detection Names : Worm:ACAD/Kenilfe.A
Kenife
Kenilfe.A
Aliases : Worm.Acad.Kenilfe.A
AutoCAD.Kenilfe
AL/Kenilfe
Category: Malware
Type: Worm
Platform: ACAD
Summary
A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.
Disinfection
Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.
Additional Details
The worm is a malicious AutoCAD program that propagates via removable drives. It also attempts to download Visual Basic Scripts from remote servers, if certain conditions are met.

Installation

During installation, the malware creates the following registry entries:

HKEY_CURRENT_USER\Software\KenFiles\settings
TMN = %Random Name% or "Temp"
TMNL = %Random Name% or "TMNL"
SHXN = %Random Name% or "isoshfr"
CXBB = 102
GXBZ = 103
pth0 = %IP Address of updatebd.8800.org% (or "221223921023103" if cannot ping the host)
pth3 = %Current Date%
pth4 = %Current Date%
pth5 = %Current Date% basepth = %User Support Folder%
fontpth = %AutoCAD Fonts Folder%

It then creates copies of itself in the following locations:

%Folder of Current Drawing%\acad.fas
%User Support Folder%\acad.fas
%AutoCAD Fonts Folder%\%SHXN%.shx

Where %SHXN% is the same as the SHXN value found in the registry entry (above).

It also creates the following files:

%Windows Folder%\DivX.fin - possibly some sort of a infection marker
%Windows Folder%\system32\%TMN%.cmd - contains commands that will create copies of the malware (same as those mentioned earlier)

Where %TMN% is also the same as the TMN value found in the registry entry.

It enables the Windows Scripting Host by creating the following registry entry:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Script Host\Settings Enabled = 1


Then deletes the registry key:

"HKEY_CURRENT_USER\Software\FileKen\settings"

It also deletes the following files:

isohztxt.shx
acad.fas1
logo.gif
isomianyi.shx



Payload

Once installed, Kenilfe downloads and executes Visual Basic Scripts based on the following conditons:

http://www.cadgs.com/[...]/gxcx.[...] - if the 3rd octect of the IP address of updatebd.8800.org > 102
http://www.cadgs.com/[...]/gxmz.[...] - if the 4th octect of the IP address of updatebd.8800.org > 103

Example: if the IP address of updatebd.8800.org is 221.239.103.104, both Visual Basic Scripts will be downloaded and executed.

These conditions are specified in the CXBB and GXBZ registry, respectively.


Propagation

The malware enumerates all folders in all removable drives. If it finds the file acad.fas, it replaces the file with a copy of

%AutoCAD Fonts Folder%\isomianyi.shx.

Alternatively, if the folder contains a drawing (.dwg) file, it will create the file acad.fas (which is really a copy of isomianyi.shx).

It then creates a file named pagefile in the same drive location, to mark that it is done infected the drive.

During the enumeration process, the malware also renames the following files to append a "_bak" in their filenames:

acad.lsp
acad.sys
acad.vlx
acadapp.lsp
acadappp.lsp
acadapq.lsp
acadiso.lsp
acadsmu.fas
dwgrun.bat
isohztxt.shx
lcm.fas
winfas.ini

05-19-2011 11:45 PM
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