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Worm-Email.Pepex Analysis Report
Threat Submitted On: 2/10/2008 2:51:09 AM
Threat Analysed On: 2/10/2008 7:51:09 AM
Threat Updated On: 1/28/2011 4:46:10 PM
Type : Worm-Email
Symptoms of Pepex
  • Spreads through the opening of infected e-mail attachments.
  • Sends a copy of itself to all the contacts of the user’s address book.
  • Sometimes has dire results like affecting the hard disk and threat to privacy.
Alias : Email-Worm.Win32.Pepex.b
Md5 Hash : [d65fdd19b78599b579739600d57149bb]
File Size : (65538 bytes)

Technical Details

Here are the Technical findings of our analysis team after analyzing this malware in detail :-

Creates the following infected Files on user's System
Delete the following Files to remove Infection
File: incomingced folderc$
Path : %networkpath%

Md5Hash :( bytes)
File: my shared folderc$
Path : %networkpath%

Md5Hash :( bytes)
File: boot64.bin
Path : %systemdrive%

Md5Hash :1fe7a59de791a55bb1ccf6ce00be0c7b ( 340029690 bytes)
File: wsys195.exe
Path : %windir%\system

Md5Hash :( bytes)
File: [randomname].exe
Path : %workingdir%

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Collapse Md5Hash :Md5Hash :
20cfa6c5b9545c2aa52c5e7afd1bd2a0 ( 65536 bytes)
cae4c7a7e4fb3ef8c3e69222ddf497c8 ( 83968 bytes)
d65fdd19b78599b579739600d57149bb ( 65538 bytes)
f4bded006e849d2283c4a0c0d0ed508a ( 425984 bytes)
The following Registry Values are added to the provided Registry Keys :-
Delete the added Values from the Key to remove Infection
|__ Value Added :
Kernel32.dll module = "%WINDIR%\System\wsys195.exe"
Creates the following child process(s) on execution:

%windir%\system32\dwwin.exe -x -s 1252


Creates the Following MUTEX(s) on user's System:-


1. %networkpath% Refers to the any network location on Local Area Network(LAN).
2. %systemdrive% Refers to the windows System drive folder. By default it is 'C:\'
3. %windir% Refers to the windows root folder. By default it is 'C:\Windows'
4. %workingdir% Refers to the current directory in which user is working.

Important: We strongly recommend that you backup the Registry before making any changes to it. Incorrect changes to the Registry can result in permanent data loss or corrupted Files. Modify the malicious\suspicious Subkeys only.

Click Here for more recommended PC Security and Optimization Tools

To modify registry entries in Windows Operating System:
Follow Steps:
1. Click Start > Run
2. Type “regedit” : to open registry editor
3. Navigate to required registry Key from the Left Tree control and modify accordingly.

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