BKDR_BLADABINDI.FK
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It drops copies of itself in the Windows Common Startup folder to enable its automatic execution at every system startup.
It executes commands from a remote malicious user, effectively compromising the affected system.
TECHNICAL DETAILS
123,904 bytes
EXE
Yes
27 Jun 2013
Compromises system security, Collects system information
Arrival Details
This backdoor 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 backdoor drops the following copies of itself into the affected system:
- %User Profile%\RealUpgrade.exe
- %User Startup%\{random file name}.exe
(Note: %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.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)
It drops the following file(s)/component(s):
- {Malware Path}\.tmp - Contains logged key strokes
Autostart Technique
This backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random file name} = ""%User Profile%\RealUpgrade.exe" .."
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{random file name} = ""%User Profile%\RealUpgrade.exe" .."
It drops copies of itself in the Windows Common Startup folder to enable its automatic execution at every system startup.
Other System Modifications
This backdoor adds the following registry keys:
HKEY_CURRENT_USER\Software\{random file name}
It adds the following registry entries:
HKEY_CURRENT_USER\Software\{random file name}
US = "!"
HKEY_CURRENT_USER\Environment
SEE_MASK_NOZONECHECKS = "1"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%User Profile%\RealUpgrade.exe = "%User Profile%\RealUpgrade.exe:*:Enabled:RealUpgrade.exe"
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- Download and execute files
- Compress files for uploading
- Load plugins
- Ping
- Registry management
- Remote shell execution
- Restart
- Screenshot
- Unistall itself
- Update itself
- Terminate itself
It connects to the following URL(s) to send and receive commands from a remote malicious user:
- {BLOCKED}3.{BLOCKED}p3.com
Information Theft
This backdoor gathers the following data:
- Computer name, country and serial number
- User name
- Operating system version
SOLUTION
9.700
10.122.03
27 Jun 2013
10.123.00
28 Jun 2013
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
Scan your computer with your Trend Micro product and note files detected as BKDR_BLADABINDI.FK
Step 3
Restart in Safe Mode
Step 4
Delete this registry key
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
- {random file name}
- {random file name}
Step 5
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_CURRENT_USER\Software\Microsoft
- Windows\CurrentVersion\Run = {random file name} = %User Profile%\RealUpgrade.exe ..
- Windows\CurrentVersion\Run = {random file name} = %User Profile%\RealUpgrade.exe ..
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft
- Windows\CurrentVersion\Run = {random file name} = %User Profile%\RealUpgrade.exe ..
- Windows\CurrentVersion\Run = {random file name} = %User Profile%\RealUpgrade.exe ..
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %User Profile%\RealUpgrade.exe = %User Profile%\RealUpgrade.exe:*:Enabled:RealUpgrade.exe
- %User Profile%\RealUpgrade.exe = %User Profile%\RealUpgrade.exe:*:Enabled:RealUpgrade.exe
- In HKEY_CURRENT_USER\Environment
- SEE_MASK_NOZONECHECKS = 1
Step 6
Search and delete these components
- {Malware path}\.tmp
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_BLADABINDI.FK. 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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