TROJ_AGENT.BDR
Dialer:Win32/IPRS (Microsoft); Dialer-253. (McAfee); Dialer.PlayGames (Symantec); Trojan.Win32.Dialer.go (Kaspersky); Dialer.PlayGames (v) (Sunbelt); Trojan.Dialer.Premium (FSecure)
Windows 2000, XP, Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Trojan creates the following folders:
- %System Root%\Documents and Settings
- %System Root%\Documents and Settings\All Users
- %User Profile%\Application Data
- %User Profile%\Application Data\Microsoft
- %User Profile%\Microsoft\Network
- %User Profile%\Network\Connections
- %User Profile%\Connections\Pbk
- %Windows%\SoftwareDistribution
- %Windows%\SoftwareDistribution\DataStore\Logs\
- %Windows%\SoftwareDistribution\DataStore
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Windows% is the Windows folder, which is usually C:\Windows.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
ASDPLUGIN = "%System%\{malware file name} -n"
Other System Modifications
This Trojan deletes the following files:
- %Windows%\SoftwareDistribution\DataStore\Logs\edbtmp.log
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
Dropping Routine
This Trojan drops the following files:
- %System%\{malware file name}
- %Desktop%\Click Me.lnk
- %Start Menu%\Click Me.lnk
- %Start Menu%\Uninstall Click Me.lnk
- %User Profile%\Pbk\rasphone.pbk
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
This report is generated via an automated analysis system.
SOLUTION
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Restart in Safe Mode
Step 3
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- ASDPLUGIN="%System%\{malware file name} -n"
Step 4
Search and delete these folders
- %System Root%\Documents and Settings
- %System Root%\Documents and Settings\All Users
- %User Profile%\Application Data
- %User Profile%\Application Data\Microsoft
- %User Profile%\Microsoft\Network
- %User Profile%\Network\Connections
- %User Profile%\Connections\Pbk
- %Windows%\SoftwareDistribution
- %Windows%\SoftwareDistribution\DataStore\Logs\
- %Windows%\SoftwareDistribution\DataStore
Step 5
Search and delete these components
- %System%\{malware file name}
- %Desktop%\Click Me.lnk
- %Start Menu%\Click Me.lnk
- %Start Menu%\Uninstall Click Me.lnk
- %User Profile%\Pbk\rasphone.pbk
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_AGENT.BDR. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
Step 7
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again. %Windows%\SoftwareDistribution\DataStore\Logs\edbtmp.log
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