TROJ_FAKEAV.MT

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.

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: %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 drops the following files:

• %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

(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.)

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.. %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.)

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\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}resoft.com/?
• http://{BLOCKED}.174.45/payform2/?
• http://{BLOCKED}.28.241/plugins.php?ts=b19355e7e92e2ae9366ab7d8da1b352dc7fc1937&affid=03600
• http://{BLOCKED}.29.179/?ts=b19355e7e92e2ae9366ab7d8da1b352dc7fc1937&token=afFfay1&affid=03600&ver=3070033&group=sca