Installation
This Backdoor drops the following files:
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)
Other System Modifications
This Backdoor adds the following registry keys:
Step 1
Terminate the malware/grayware/spyware process:
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Notes=
For Windows 98 and ME users, Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps. To terminate the malware/grayware/spyware process:
- Scan your computer with your Trend Micro product and then take note of the names of the malware file(s) detected.
- Open Windows Task Manager.
• For Windows 98 and ME users, press
CTRL+ALT+DELETE
• For Windows NT, 2000, XP, and Server 2003 users, press
CTRL+SHIFT+ESC, then click the Processes tab. - In the list of running programs, locate a malware/grayware/spyware file detected earlier.
- Select the detected files, then press either the End Task or the End Process button, depending on the version of Windows you are using.
- Do the same for the remaining detected malware/grayware/spyware files in the list of running programs.
- To check if the malware/grayware/spyware process has been terminated, close Task Manager, and then open it again.
- Close Task Manager.
Step 2
Delete this registry value
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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\{02E5C0CA-136F-C9B9-C161-2D4F64B27184}
- HKEY_CLASSES_ROOT\CLSID\{02E5C0CA-136F-C9B9-C161-2D4F64B27184}\InprocServer32
- (Default)=%System%\esjknr.dIl
- HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Explorer\ShellIconOverlayIdentifiers\esjknr
- (Default)={02E5C0CA-136F-C9B9-C161-2D4F64B27184}
To delete the registry value this malware/grayware/spyware created:
- Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
- In the left panel, double-click the following:
In the left panel of the Registry Editor window, double-click the following:HKEY_CLASSES_ROOT\CLSID\{02E5C0CA-136F-C9B9-C161-2D4F64B27184}\InprocServer32In the right panel, locate and delete the entry:(Default)=%System%\esjknr.dIl - In the right panel, locate and delete the entry:
In the right panel, locate and delete the entry:ThreadingModel = Apartment - In the left panel, double-click the following:
In the left panel of the Registry Editor window, double-click the following:HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Explorer\ShellIconOverlayIdentifiers\esjknrIn the right panel, locate and delete the entry:(Default)={02E5C0CA-136F-C9B9-C161-2D4F64B27184} - In the right panel, locate and delete the entry:
= - Close Registry Editor.
Step 3
Search and delete these files
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There may be some component files that are hidden. Please make sure you check the
Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
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.
Once located, select the file then press SHIFT+DELETE to permanently delete the file. Repeat the said steps for all files listed. 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.
Step 5
Scan your computer with your Trend Micro product to delete files detected as
BKDR_AFCORE.AW
*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.
