Analysis by: Sabrina Lei Sioting
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 1,246 bytes
File Type: REG
Memory Resident: No
Initial Samples Received Date: 08 Jun 2011

Arrival Details

This Trojan may be dropped by the following malware:

  • TROJ_DROPPR.FB

Autostart Technique

This Trojan creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
daemon = "%Windows%\temp\cookies\daemon.exe"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Daemon\Parameters
Application = "%Windows%\temp\cookies\daemon.exe"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Daemon\Parameters
AppDirectory = "%Windows%\temp\cookies\daemon.exe"

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\mIRC

HKEY_CURRENT_USER\Software\mIRC\
Channels

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 8.211.00
VSAPI OPR PATTERN Date: 08 Jun 2011

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Remove malware files dropped/downloaded by REG_FLOODER.BS

Step 3

Delete this registry value

[ Learn More ]

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
    • daemon = "%Windows%\temp\cookies\daemon.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Daemon\Parameters
    • Application = "%Windows%\temp\cookies\daemon.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Daemon\Parameters
    • AppDirectory = "%Windows%\temp\cookies\daemon.exe"

Step 4

Delete this registry key

[ Learn More ]

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_CURRENT_USER\Software\
    • mIRC

Step 5

Scan your computer with your Trend Micro product to delete files detected as REG_FLOODER.BS. 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.


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