McAfee > Theat Center > Virus Detail Page

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 email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Aliases

• Backdoor.Padmin

Characteristics

This is a generic detection for a remote access trojan written in Visual Basic. As this description is meant to be generic, filenames and registry keys may differ.

Installation

Upon installation, the following registry keys are created. The subkeys contains settings used by the backdoor.

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\pAdmin\

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\pAdmin\pAdmin v0.8G

The following registry keys are also created to run the trojan at startup:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\
Run "QoSsrv" = "CSRSS.EXE"

Remote Access Functionality

Once running on the victim machine, the server component opens a TCP socket accepting commands sent from the client component on port 6351.

The following functions may be performed on the compromised machine, including:

• Logging on to a predefined IRC server to wait for commands.
• Logging on to an Apache server on port 7479 to receive updates or to wait for commands.
• Enabling shares of user's files and directories.
• Upload/download/execute files on the victim machine

Symptoms

• The following port(s) open: 6351
• Existence of the files/Registry keys detailed above

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, email, etc.

Removal

All Users :
Script,Batch,Macro and non memory-resident:
Use current engine and DAT files for detection and removal.

PE,Trojan,Internet Worm and memory resident :
Use specified engine and DAT files for detection. To remove, boot to MS-DOS mode or use a boot diskette and use the command line scanner:

Additional Windows ME/XP removal considerations

Users should not trust file icons, particularly when receiving files from others via P2P clients, IRC, email or other mediums where users can share files.

AVERT Recommended Updates :

* Office2000 Updates

* Malformed Word Document Could Enable Macro to Run Automatically (Information/Patch )

* scriptlet.typelib/Eyedog vulnerability patch

* Outlook as an email attachment security update

* Exchange 5.5 post SP3 Information Store Patch 5.5.2652.42 - this patch corrects detection issues with GroupShield

For a list of attachments blocked by the Outlook patch and a general FAQ, visit this link .
Additionally, Network Administrators can configure this update using an available tool - visit this link for more information .

It is very common for macro viruses to disable options within Office applications for example in Word, the macro protection warning commonly is disabled. After cleaning macro viruses, ensure that your previously set options are again enabled.

Variants

Variants

N/A

All Information

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 email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Aliases

• Backdoor.Padmin

Characteristics

Characteristics -

This is a generic detection for a remote access trojan written in Visual Basic. As this description is meant to be generic, filenames and registry keys may differ.

Installation

Upon installation, the following registry keys are created. The subkeys contains settings used by the backdoor.

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\pAdmin\

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\pAdmin\pAdmin v0.8G

The following registry keys are also created to run the trojan at startup:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\
Run "QoSsrv" = "CSRSS.EXE"

Remote Access Functionality

Once running on the victim machine, the server component opens a TCP socket accepting commands sent from the client component on port 6351.

The following functions may be performed on the compromised machine, including:

• Logging on to a predefined IRC server to wait for commands.
• Logging on to an Apache server on port 7479 to receive updates or to wait for commands.
• Enabling shares of user's files and directories.
• Upload/download/execute files on the victim machine

Symptoms

Symptoms -

• The following port(s) open: 6351
• Existence of the files/Registry keys detailed above

Method of Infection

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, email, etc.

Removal -

Removal -

All Users :
Script,Batch,Macro and non memory-resident:
Use current engine and DAT files for detection and removal.

PE,Trojan,Internet Worm and memory resident :
Use specified engine and DAT files for detection. To remove, boot to MS-DOS mode or use a boot diskette and use the command line scanner:

Additional Windows ME/XP removal considerations

Users should not trust file icons, particularly when receiving files from others via P2P clients, IRC, email or other mediums where users can share files.

AVERT Recommended Updates :

* Office2000 Updates

* Malformed Word Document Could Enable Macro to Run Automatically (Information/Patch )

* scriptlet.typelib/Eyedog vulnerability patch

* Outlook as an email attachment security update

* Exchange 5.5 post SP3 Information Store Patch 5.5.2652.42 - this patch corrects detection issues with GroupShield

For a list of attachments blocked by the Outlook patch and a general FAQ, visit this link .
Additionally, Network Administrators can configure this update using an available tool - visit this link for more information .

It is very common for macro viruses to disable options within Office applications for example in Word, the macro protection warning commonly is disabled. After cleaning macro viruses, ensure that your previously set options are again enabled.

Variants

Variants -

N/A