TROJ_FAKEAV.OTZ
Win32/AdWare.FakeAV.O application (NOD32), Trojan.Win32.Fraud.eld (Kaspersky), Rogue:Win32/Winwebsec (Microsoft)
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.
TECHNICAL DETAILS
657,408 bytes
EXE
Yes
29 Jan 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:
- %All Users Profile%\Application Data\hVrs3333\hVrs3333.exe
(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.)
It creates the following folders:
- %All Users Profile%\Application Data\hVrs3333
- %Start Menu%\Programs\Smart Guard Protection
(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.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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
AS2014 = "%All Users Profile%\Application Data\hVrs3333\hVrs3333.exe"
Dropping Routine
This Trojan drops the following files:
- %All Users Profile%\Application Data\hVrs3333\hVrs3333QxDtgggg.in
- %All Users Profile%\Application Data\hVrs3333\hVrs3333QxDtgggg.lg
- %All Users Profile%\Application Data\hVrs3333\hVrs3333.exe.manifest
- %All Users Profile%\Application Data\hVrs3333\hVrs3333.ico
- %All Users Profile%\Application Data\hVrs3333\DD1
- %All Users Profile%\Application Data\hVrs3333\DD2
- %All Users Profile%\Application Data\hVrs3333\DD3
- %All Users Profile%\Application Data\hVrs3333\rr.bat
- %Desktop%\Smart Guard Protection support.url
- %Desktop%\Smart Guard Protection.lnk
- %Start Menu%\Programs\Smart Guard Protection\Smart Guard Protection support.url
- %Start Menu%\Programs\Smart Guard Protection\Smart Guard Protection.lnk
(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.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}.{BLOCKED}.209.166/api/dom/no_respond/?{random}
- http://{BLOCKED}.{BLOCKED}.209.166/api/stats/debug/1/?{random}
- http://{BLOCKED}.{BLOCKED}.209.166/api/stats/debug/2/?{random}
- http://{BLOCKED}.{BLOCKED}.209.166/api/stats/debug/3/?{random}
- http://{BLOCKED}.{BLOCKED}.209.166/api/urls/?{random}
SOLUTION
9.700
10.574.02
30 Jan 2014
10.575.00
31 Jan 2014
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
- AS2014 = "%All Users Profile%\Application Data\hVrs3333\hVrs3333.exe"
- AS2014 = "%All Users Profile%\Application Data\hVrs3333\hVrs3333.exe"
Step 4
Search and delete this folder
- %All Users Profile%\Application Data\hVrs3333
- %Start Menu%\Programs\Smart Guard Protection
Step 5
Search and delete this file
- %Desktop%\Smart Guard Protection support.url
- %Desktop%\Smart Guard Protection.lnk
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_FAKEAV.OTZ. 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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