BKDR_BLADABINDI.NIL
Backdoor:MSIL/Bladabindi (Microsoft)
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted:
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 connects to a website to send and receive information.
It logs a user's keystrokes to steal information.
It gathers information and reports it to its servers.
TECHNICAL DETAILS
416,768 bytes
EXE
Yes
28 Aug 2015
Drops files, Logs keystrokes, Connects to URLs/IPs, Steals 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 a copy of itself in the following folders using different file names:
- %User Startup%\{malware file name}.exe
- {Drive Letter}:\! My Picutre.SCR
- %All Users Profile%\System.exe
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.. %All Users Profile% is the All Users folder, where it usually is C:\Documents and Settings\All Users on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It terminates the execution of the copy it initially executed and executes the copy it drops instead.
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
{malware file name} = "%All Users Profile%\System.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{malware file name} = "%All Users Profile%\System.exe"
Other System Modifications
This Backdoor adds the following registry keys:
HKEY_CURRENT_USER\Software
{malware file name} =
It adds the following registry entries:
HKEY_CURRENT_USER\Environment
SEE_MASK_NOZONECHECKS = "1"
HKEY_CURRENT_USER\Software\d8a6bf8fbc1fe1e712d8df6106f791fec75378c9
US = "@"
Propagation
This Backdoor drops the following copy of itself in all physical and removable drives:
- {drive letter}\! My Picutre.SCR
Backdoor Routine
This Backdoor connects to the following websites to send and receive information:
- njrat2012.{BLOCKED}p.biz:1177
- {BLOCKED}.{BLOCKED}.99.109:1177
Information Theft
This Backdoor logs a user's keystrokes to steal information.
Other Details
This Backdoor does the following:
- It bypasses firewall via netsh
It gathers the following information and reports it to its servers:
- Computer name, country and serial number
- User name
- Operating system version
SOLUTION
9.850
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Terminate a process file/s detected as BKDR_BLADABINDI.NIL
*Note: If the detected file/s is/are not displayed in theWindows Task Manager, continue doing the next steps.
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
- {malware file name}
- {malware file name}
Step 5
Delete these registry values
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator’s help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- {malware file name} = "%User Temp%\svchost.exe"
- {malware file name} = "%User Temp%\svchost.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- {malware file name} = "%User Temp%\svchost.exe"
- {malware file name} = "%User Temp%\svchost.exe"
- In HKEY_CURRENT_USER\Environment
- SEE_MASK_NOZONECHECKS = "1"
- SEE_MASK_NOZONECHECKS = "1"
Step 6
Scan your computer with your Trend Micro product to delete files detected as BKDR_BLADABINDI.NIL. 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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