TROJ_PASTA.PAFT
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
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.
It is a component of other malware.
It requires its main component to successfully perform its intended routine.
TECHNICAL DETAILS
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 is a component of other malware.
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
{malware name} = regsvr32.exe {malware path and filename}
Other System Modifications
This Trojan adds the following registry entries:
HKEY_CLASSES_ROOT\CLSID\{5BF27651-54BD-4E92-88B9-0E841ECE5D98}
#cert = hex:31,
HKEY_CLASSES_ROOT\CLSID\{73CB5E31-7D60-485F-A2AF-631070691790}
{047166FC-1345-4461-BA1B-3CF24ACB36D6} = hex:2f,c1,da,2d,
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
NoProtectedModeBanner = 1
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
TabProcGrowth = 0
Other Details
This Trojan requires its main component to successfully perform its intended routine.
SOLUTION
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_CLASSES_ROOT\CLSID
- {5BF27651-54BD-4E92-88B9-0E841ECE5D98}
- {5BF27651-54BD-4E92-88B9-0E841ECE5D98}
- In HKEY_CLASSES_ROOT\CLSID
- {73CB5E31-7D60-485F-A2AF-631070691790}
- {73CB5E31-7D60-485F-A2AF-631070691790}
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\Internet Explorer\Main
- NoProtectedModeBanner = 1
- NoProtectedModeBanner = 1
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- TabProcGrowth = 1
- TabProcGrowth = 1
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- {malware name} = "regsvr32.exe "{malware path and filename""
- {malware name} = "regsvr32.exe "{malware path and filename""
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_PASTA.PAFT. 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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