BKDR_GATES.XUZL
Backdoor:Win32/Farfli.BD (Microsoft)
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
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 executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.
TECHNICAL DETAILS
287,744 bytes
EXE
Yes
28 Aug 2014
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 the following component file(s):
- {malware path}\fake.cfg - configuration file which can be updated via C&C server
- %Program Files%\DbProtectSupport\fake.cfg - configuration file which can be updated via C&C server
- %Program Files%\DbProtectSupport\svchost.exe - detected as BKDR_GATES.XUZL
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
Autostart Technique
This backdoor registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\DbProtectSupport
ImagePath = "%Program Files%\DbProtectSupport\svchost.exe"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\DbProtectSupport
Start = "2"
It starts the following services:
- DbProtectSupport
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- Perfrom DDOS attack:
- TCP flooding
- UDP flooding
- ICMP flooding
- Inform status to malicious remote user
- Terminate attack
- Update configuration file
It connects to the following websites to send and receive information:
- {BLOCKED}81.{BLOCKED}quye.mobi
- {BLOCKED}11.{BLOCKED}quye.mobi
Information Theft
This backdoor s configuration file contains the following information:
- first line - command (start, stop, type of DDoS attack)
- second line - range of IP addresses
- third line - range of ports to be used
It gathers the following data:
- OS Version
- Country
- Network Interface performance (Network Interface({name})\Bytes Total/sec)
- Processor performance
SOLUTION
9.300
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
Scan your computer with your Trend Micro product and note files detected as BKDR_GATES.XUZL
Step 4
Disable this malware service
- DbProtectSupport
Step 5
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_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
- DbProtectSupport
- DbProtectSupport
Step 6
Search and delete these files
- {malware path}\fake.cfg
- %Program Files%\DbProtectSupport\fake.cfg
- %Program Files%\DbProtectSupport\svchost.exe
Step 7
Scan your computer with your Trend Micro product to delete files detected as BKDR_GATES.XUZL. 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.
Did this description help? Tell us how we did.