TROJ_LYDRA.BM
Windows 98, ME, NT, 2000, XP, Server 2003
Threat Type:
Destructiveness:
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan adds registry entries to enable its automatic execution at every system startup.
TECHNICAL DETAILS
129895 bytes
20 Apr 2010
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
It drops the following files:
- C:\DOCUMENTS AND SETTINGS\ALL USERS\START MENU\Programs\Startup\ADOBELOADER.SCR
Other System Modifications
This Trojan adds the following registry keys:
Other Details
This Trojan adds the following lines or registry entries as part of its routine:
SOLUTION
Step 1
Terminate the malware/grayware/spyware process:
Step 2
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.
- HKEY_CLASSES_ROOT\CLSID\{65D5AFFB-D4EF-49AA-GFFG-5DA5E12E300A}
- Thi={malware path and filename}
- VerProg=9e
- HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Run\wdfmgr
- %Windows%\wdfmgr.exe=REG_SZ
- HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Policies\Explorer\Run\wdfmgr
- %Windows%\wdfmgr.exe=REG_SZ
- HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\RunServices\wdfmgr
- %Windows%\wdfmgr.exe=REG_SZ
- HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Run\lsassv
- %Windows%\lsassv.exe=REG_SZ
Step 3
Search and delete these files
- C:\DOCUMENTS AND SETTINGS\ALL USERS\START MENU\Programs\Startup\ADOBELOADER.SCR
Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
Step 4
Restore this file from backup Only Microsoft-related files will be restored. If this malware/grayware/spyware also deleted files related to programs that are not from Microsoft, please reinstall those programs on your computer again.
- %Windows%\wdfmgr.exe
- %Windows%\lsassv.exe
- %Windows%\msrpc.exe
- C:\windows\calc.exe
- C:\windows\regedit.exe
- C:\windows\system32\calc.exe
- C:\windows\system32\regedit.exe
- C:\DOCUMENTS AND SETTINGS\ALL USERS\START MENU\Programs\Startup\ADOBELOADER.SCR
Step 5
Scan your computer with your Trend Micro product to delete files detected as
TROJ_LYDRA.BM
*Note: 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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