BKDR_NETBOT.PCCC
Backdoor:Win32/Venik (MICROSOFT), a variant of Win32/Agent.ORM trojan (NOD32),
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
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 executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.
It gathers certain information on the affected computer.
TECHNICAL DETAILS
68,096 bytes
Yes
Connects to URLs/IPs, 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 files:
- %User Temp%\(7 random numbers)_res.tmp - also detected as BKDR_NETBOT.PCCC
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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 drops the following component file(s):
- %System%\R{random characters}C.dll - also detected as BKDR_NETBOT.PCCC
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It injects itself into the following processes running in the affected system's memory:
- svchost.exe
Other System Modifications
This backdoor adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost
krnlsrvc = "{Variable Value 1}"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{Variable Value 1}
Description = "NetBot Attacker"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{Variable Value 1}\Parameters
ServiceDll = "%System%\R{random characters}C.dll"
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- Perform remote shell
- Monitor mouse and keyboard events
- Uninstall itself
- Terminate process
- Capture screenshot
- Get drive information
- File Manipulation (Create, Modify, Rename, Copy, Delete)
- Execute file
- Send File
It connects to the following websites to send and receive information:
- www.{BLOCKED}n.com/ip2008.txt via port: 80
Information Theft
This backdoor gathers the following information on the affected computer:
- Computer Name
- OS Version
- RAM
NOTES:
{Variable Value 1} may have the following values:
- BITS
- NetBot
SOLUTION
9.700
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
Restart in Safe Mode
Step 4
Search and delete this file
- %User Temp%\(7 random numbers)_res.tmp
- %System%\R{random characters}C.dll
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
- krnlsrvc = "{Variable Value 1}"
- krnlsrvc = "{Variable Value 1}"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\{Variable Value 1}
- Description = "NetBot Attacker"
- Description = "NetBot Attacker"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\{Variable Value 1}\Parameters
- ServiceDll = "%System%\R{random characters}C.dll"
- ServiceDll = "%System%\R{random characters}C.dll"
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_NETBOT.PCCC. 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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