TROJ_NEUREVT.TUA
Trojan:Win32/Neurevt.AB (Microsoft); RDN/Generic Dropper!vt (McAfee); Trojan.Win32.Neurevt.bnh (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse MSIL6.QKN (AVG)
Windows
![](/vinfo/imgFiles/legend.jpg)
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.
TECHNICAL DETAILS
290,304 bytes
EXE
No
14 Jan 2015
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 creates the following folders:
- %Program Files%\Common Files\srvcs
(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.)
Other System Modifications
This Trojan deletes the following files:
- {malware path and file name}:zone.identifier
- %Program Files%\Common Files\srvcs\kcdynangs.exe:Zone.Identifier
(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.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\Win7zip
HKEY_CURRENT_USER\Software\Classes\
CLSID\{1A1E79DE-1494-A247-AA4B-E38827BE6DEB}\611607C0\
CG1
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
kcdynangs.exe
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Win7zip
Uuid = "{random values}"
Dropping Routine
This Trojan drops the following files:
- %User Temp%\bin.exe
- %Program Files%\Common Files\srvcs\desktop.ini
(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.. %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.)
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
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
- Win7zip
- In HKEY_CURRENT_USER\Software\Classes\CLSID\{1A1E79DE-1494-A247-AA4B-E38827BE6DEB}\611607C0
- CG1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- kcdynangs.exe
Step 3
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\Win7zip
- Uuid = "{random values}"
Step 4
Search and delete these components
- %User Temp%\bin.exe
- %Program Files%\Common Files\srvcs\desktop.ini
Step 5
Search and delete this folder
- %Program Files%\Common Files\srvcs
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_NEUREVT.TUA. 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.
Step 7
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- {malware path and file name}:zone.identifier
- %Program Files%\Common Files\srvcs\kcdynangs.exe:Zone.Identifier
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