TROJ_FAKEAV.NUD
Rogue:Win32/FakeRean(Microsoft), Trojan.FakeAV!gen106(NORTON),Trojan.Win32.FakeRean.at (v)(SUNBELT)
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: Trojan
Destructiveness: No
Encrypted:
In the wild:
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
861,696 bytes
EXE
Yes
07 May 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 files:
- %All Users Profile%\Application Data\bsprotection.exe
- %Desktop%\Internet Security 2013.LNK
- %User Temp%\{random character}.tmp
(Note: %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Internet Security = "%All Users Profile%\Application Data\bsprotection.exe"
Other System Modifications
This Trojan adds the following registry entries:
HKEY_CURRENT_USER\Software\{random characters}
FRun = "0"
HKEY_CURRENT_USER\Software\{random characters}
O`ld = "Houdsodu!Rdbtshux"
HKEY_CURRENT_USER\Software\{random characters}
Q`ui = "B;]Enbtldour!`oe!Rduuhofr]@mm!Trdsr]@qqmhb`uhno!E`u`]crqsnudbuhno/dyd"
It adds the following registry keys as part of its installation routine:
HKEY_CURRENT_USER\Software\{random characters}
Other Details
This Trojan connects to the following possibly malicious URL:
- {BLOCKED}am.net
- {BLOCKED}yn.com
SOLUTION
9.700
10.298.01
19 Sep 2013
10.299.00
25 Sep 2013
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 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
- "Internet Security = %All Users Profile%\Application Data\bsprotection.exe"
- "Internet Security = %All Users Profile%\Application Data\bsprotection.exe"
Step 4
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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.
- In HKEY_CURRENT_USER\Software
- {random characters}
- {random characters}
Step 5
Search and delete this file
- %All Users Profile%\Application Data\bsprotection.exe
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_FAKEAV.NUD. 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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