TROJ_DANGLO.WPG
Trojan:Win32/Danglo!gmb (Microsoft); RDN/Downloader.a!rk (McAfee); Backdoor.Trojan (Symantec); HEUR:Trojan.Win32.Generic (Kaspersky); Mal/Generic-L (Sophos); Backdoor.Win32.Hupigon (v) (Sunbelt); Trojan horse Downloader.Generic13.CDSF (AVG)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes itself after execution.
TECHNICAL DETAILS
32,768 bytes
EXE
Yes
24 Jul 2014
Arrival Details
This Trojan 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 Trojan drops the following copies of itself into the affected system:
- %Program Files%\Windows NT\cssrq.exe
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
It creates the following folders:
- %Program Files%\AppPatch
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
Autostart Technique
This Trojan registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Wsujea pjvnjbwx
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\MediaResources\msvideo
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Wsujea pjvnjbwx
DeleteFiles = "{malware path and file name}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Wsujea pjvnjbwx
ConnectGroup = "ĬÈÏ·Ö×é"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Wsujea pjvnjbwx
Description = "¼à²âºÍ¼àÊÓÐÂÓ²¼þÉ豸²¢×Ô¶¯±¸Çý"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Wsujea pjvnjbwx
MarkTime = "2014-06-20 05:37"
Dropping Routine
This Trojan drops the following files:
- %Program Files%\AppPatch\NetSyst68.dll
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://www.{BLOCKED}6.com/ads/NetSyst68.jpg
- http://user.{BLOCKED}e.qq.com/8864483
- {BLOCKED}74.4
- {BLOCKED}.107.90
- {BLOCKED}.8.192
- {BLOCKED}.8.146
It deletes itself after execution.
This report is generated via an automated analysis system.
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
Restart in Safe Mode
Step 3
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
- Wsujea pjvnjbwx
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MediaResources
- msvideo
Step 4
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\SYSTEM\ControlSet001\Services\Wsujea pjvnjbwx
- DeleteFiles = "{malware path and file name}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Wsujea pjvnjbwx
- ConnectGroup = "ĬÈÏ·Ö×é"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Wsujea pjvnjbwx
- Description = "¼à²âºÍ¼àÊÓÐÂÓ²¼þÉ豸²¢×Ô¶¯±¸Çý"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Wsujea pjvnjbwx
- MarkTime = "2014-06-20 05:37"
Step 5
Search and delete this file
- %Program Files%\AppPatch\NetSyst68.dll
Step 6
Search and delete this folder
- %Program Files%\AppPatch
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DANGLO.WPG. 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.