Generic PWS.y!736B59781A32

This page shows details and results of our analysis on the malware Generic PWS.y!736B59781A32

Overview

This is a Trojan detection. Unlike viruses, Trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include e-mail, malicious or hacked Web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.


Minimum Engine

5600.1067

File Length

942080

Description Added

2013-07-25

Description Modified

2013-07-25

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionGeneric PWS.y
Length942080 bytes
MD5736b59781a320cd3cc89c33cdddf67bc
SHA1f5cd9d0440f9e070e6b41c34154496d4bae33b7f


Other Common Detection Aliases

Company NamesDetection Names
ahnlabTrojan/Win32.Tepfer
avastWin32:Downloader-TXK
aviraTR/Kazy.94208012
KasperskyTrojan-PSW.Win32.Tepfer.odnf
Dr.WebBackDoor.Slym.2035
FortiNetW32/Kelihos.BC!tr
MicrosoftBackdoor:Win32/Kelihos.F
SymantecSuspicious.Cloud.2
EsetWin32/Kryptik.BGDL
normanwinpe/Kelihos.TJU
vba32BScope.Malware-Cryptor.Mystig

Other brands and names may be claimed as the property of others.


ActivitiesRisk Levels
Modifies Windows explorer file browser's Advanced settings. Sometimes used by malware to make executable files look like documents.Medium
Adds or modifies a system service.Low
Enumerates many system files and directories.Low
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaGeneric PWS.y
McAfee SupportedGeneric PWS.y



System Changes

Some path values have been replaced with environment variables as the exact location may vary with different configurations.
e.g.
%WINDIR% = \WINDOWS (Windows 9x/ME/XP/Vista/7), \WINNT (Windows NT/2000)
%PROGRAMFILES% = \Program Files


The following files were analyzed:

F5CD9D0440F9E070E6B41C34154496D4BAE33B7F

The following files have been added to the system:

  • %WINDIR%\SYSTEM32\wpcap.dll
  • %WINDIR%\SYSTEM32\drivers\npf.sys
  • %WINDIR%\SYSTEM32\packet.dll

The following files were temporarily written to disk then later removed:

  • %TEMP%\tmp.exe

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\NOTEPAD\DEFAULTCOMPRESSEDRECORD = [binary data]
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\NOTEPAD\FLAGSMODIFIEDVALID
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\NOTEPAD\RECORDMODIFIEDMAX = DC/55z6DY1YMNjDXESnTSbM1A+wrPj+LTWXZVHTBNd05PYRcpDSAXfOaJltEfcEZ3g==
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\ACTIVEMODIFIEDTHEME = [binary data]
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\INFOPLAYEDCURRENT
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\SIZECOMPLETEDVALID = DC/55z6DY1YMNjDXESnTSbM1A+wrPj+LTWXZVHTBNd05PYRcpDSAXfOaJltEfcEZ3g==
  • HKEY_CURRENT_USER\SOFTWARE\SYSINTERNALS\PROCESS EXPLORER\DBSAVEDUSE = [binary data]
  • HKEY_CURRENT_USER\SOFTWARE\SYSINTERNALS\PROCESS EXPLORER\LINELOADEDQUICK = DC/55z6DY1YMNjDXESnTSbM1A+wrPj+LTWXZVHTBNd05PYRcpDSAXfOaJltEfcEZ3g==
  • HKEY_CURRENT_USER\SOFTWARE\SYSINTERNALS\PROCESS EXPLORER\PERSISTENTLOCALIZEDNAME = [binary data]
  • HKEY_CURRENT_USER\SOFTWARE\SYSINTERNALS\PROCESS EXPLORER\PLATFORMCOMPRESSEDVALID
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\NETWORKNOTIFYER = %TEMP%\F5CD9D0440F9E070E6B41C34154496D4BAE33B7F

The applications attempted the following network connection(s):

  • 37.229.50.***:80
  • 27.3.131.***:80
  • 46.160.71.**:80

Symptoms

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Method of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.

Removal

All Users:

Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

1.Disable System Restore .

2.Update to current engine and DAT files for detection and removal.

3.Run a complete system scan.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

1. Please go to the Microsoft Recovery Console and restore a clean MBR.

On windows XP:

Insert the Windows XP CD into the CD-ROM drive and restart the computer.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Select the Windows installation that is compromised and provide the administrator password
Issue 'fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

Insert the Windows CD into the CD-ROM drive and restart the computer.
Click on "Repair Your Computer"
When the System Recovery Options dialog comes up, choose the Command Prompt.
Issue 'bootrec /fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.

Variants