Backdoor.Win32.NETWIRED.FCD
a variant of Win32/Injector.EJCP trojan (NOD32); Trojan.Win32.Krypt (IKARUS)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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. However, as of this writing, the said sites are inaccessible.
It steals certain information from the system and/or the user.
TECHNICAL DETAILS
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 adds the following processes:
- {Malware Path}\{Malware Filename}.exe
It creates the following folders:
- %Application Data%\Logs
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- VVJTVMlV
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 Path}\{Malware Filename}.exe
Other System Modifications
This Backdoor adds the following registry entries:
HKEY_CURRENT_USER\Software\NetWire
HostId = NEW
HKEY_CURRENT_USER\Software\NetWire
Install Date = {Install Date and Time}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\-
StubPath = {Malware Path}\{Malware Filename}.exe
Backdoor Routine
This Backdoor executes the following commands from a remote malicious user:
- List Running Processes
- List Drive Information
- Perform Keylogging Routine
- Get Logon Sessions
- List TCP and UDP Listening Ports
- Download & execute files on the affected system
- Execute Command Shell
- List files in a directory
- Terminate Processes
- Get File or Process Information
It connects to the following URL(s) to send and receive commands from a remote malicious user:
- {BLOCKED}.{BLOCKED}.131.184:4095
However, as of this writing, the said sites are inaccessible.
Dropping Routine
This Backdoor drops the following files:
- %User Temp%\{Random Characters}.bat → For Self Deletion
(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It drops the following file(s), which it uses for its keylogging routine:
- %Application Data%\Logs\{DD-MM-YYYY}
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Information Theft
This Backdoor steals the following information:
- Credentials in the following protocol:
- POP3
- IMAP
- HTTP
- SMTP
- EAS
- System Information:
- Computer Name
- Current User Name
- OS Version
- Product Version
- Processor Information
It attempts to get stored information such as user names, passwords, and hostnames from the following browsers:
- Opera
- Yandex Browser
- Purple
- Comodo Dragon
- Chromium
- Internet Explorer
- Google Chrome
- Brave
- Mozilla Seamonkey
- Mozilla Firefox
It attempts to steal stored email credentials from the following:
- Mozilla Thunderbird
- Microsoft Outlook
SOLUTION
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
- Troj.Win32.TRX.XXPE50FFF036
Step 2
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 3
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 4
Restart in Safe Mode
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
- - = {Malware Path}\{Malware Filename}.exe
- - = {Malware Path}\{Malware Filename}.exe
- In HKEY_CURRENT_USER\Software\NetWire
- HostId = NEW
- HostId = NEW
- In HKEY_CURRENT_USER\Software\NetWire
- Install Date = {Install Date and Time}
- Install Date = {Install Date and Time}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\-
- StubPath = {Malware Path}\{Malware Filename}.exe
- StubPath = {Malware Path}\{Malware Filename}.exe
Step 6
Search and delete these folders
- %Application Data%\Logs
Step 7
Search and delete this file
- %Application Data%\Logs\{DD-MM-YYYY}
- %User Temp%\{Random Characters}.bat
*Note: Read the following Microsoft page if these steps do not work on Windows 7 and Windows Server 2008 (R2).
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Backdoor.Win32.NETWIRED.FCD. 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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