TROJ_FAKEAV.MRC
Rogue:Win32/Winwebsec (Microsoft), Trojan.Win32.FakeAV.rlsd (Kaspersky), Trojan.FakeAV!gen105 (Norton)
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
495,616 bytes
EXE
Yes
19 Jun 2013
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%\{Random Folder Name}\{Random File Name}.exe
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
It drops the following files:
- %All Users Profile%\%Application Data%\{Random Folder Name}\{Random File Name}
- %All Users Profile%\%Application Data%\{Random Folder Name}\{Random File Name}.ico
- %Desktop%\System Care Antivirus.lnk
- %Start Menu%\Programs\System Care Antivirus\System Care Antivirus.lnk
- %User Temp%\{Random File Name}.xml
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on 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.. %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.)
It creates the following folders:
- %Start Menu%\Programs\System Care Antivirus
- %All Users Profile%\%Application Data%\{Random Folder Name}
(Note: %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.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
Other System Modifications
This Trojan adds the following registry keys:
HKCU\Software\Microsoft\
Installer\Products\{Random File Name}
It adds the following registry entries:
HKCU\Software\Microsoft\
Windows\CurrentVersion\RunOnce
{Random File Name} = "%All Users Profile%\%Application Data%\{Random Folder Name}\{Random File Name}.exe"
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}.174.34/payform2/?
- http://{BLOCKED}.174.34/payform2/?&lid=3070033&affid=03600&nid=DC0C021C&group=sca
- http://{BLOCKED}.29.179/?ts=6c474ae5a6f55609e301855c1234e0b3bd01a6ca&token=afFfay1
- http://{BLOCKED}.29.179/?ts=6c474ae5a6f55609e301855c1234e0b3bd01a6ca&token=afFfay1&affid=03600&ver=3070033&group=sca
- http://{BLOCKED}.28.241/plugins.php?ts=6c474ae5a6f55609e301855c1234e0b3bd01a6ca
- http://{BLOCKED}.28.241/plugins.php?ts=6c474ae5a6f55609e301855c1234e0b3bd01a6ca&affid=03600
- http://sys.{BLOCKED}support.net/?
SOLUTION
9.300
10.102.03
19 Jun 2013
10.103.00
20 Jun 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
Scan your computer with your Trend Micro product and note files detected as TROJ_FAKEAV.MRC
Step 3
Restart in Safe Mode
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
- {Random File Name} = "%All Users Profile%\%Application Data%\{Random Folder Name}\{Random File Name}.exe"
- {Random File Name} = "%All Users Profile%\%Application Data%\{Random Folder Name}\{Random File Name}.exe"
Step 5
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\Microsoft\Installer\Products
- {Random File Name}
- {Random File Name}
Step 6
Search and delete this file
- %All Users Profile%\%Application Data%\{Random Folder Name}\{Random File Name}
- %All Users Profile%\%Application Data%\{Random Folder Name}\{Random File Name}.exe
- %All Users Profile%\%Application Data%\{Random Folder Name}\{Random File Name}.ico
- %Desktop%\System Care Antivirus.lnk
- %Start Menu%\Programs\System Care Antivirus\System Care Antivirus.lnk
- %User Temp%\{Random File Name}.xml
Step 7
Search and delete these folders
- %Start Menu%\Programs\System Care Antivirus
- %All Users Profile%\%Application Data%\{Random Folder Name}
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_FAKEAV.MRC. 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.