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Trojan.Win32.PINCAV.GD

May 17, 2024
 Analysis by: John Rainier Navato
 ALIASES:

W32/Pincav.AWTC!tr (FORTINET)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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

File Size:

1,482,752 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

07 Apr 2014

Payload:

Deletes files, Drops files, Modifies system registry

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:

  • %Application Data%\vfbu.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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Taskman = %Application Data%\vfbu.exe

Other System Modifications

This Trojan deletes the following files:

  • %User Profile%\Application Data\vfbu.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{K7C0DB872A3F777C0} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{5A8A1D95-22E9-3963-2E06-90BDD094E562}\InprocServer32
ThreadingModel = "Both"

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{I510F7641510D2FD4} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion\Parameters
TrapPollTimeMilliSecs = 15000

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{5A8A1D95-22E9-3963-2E06-90BDD094E562}\InprocServer32
(Default) = %systemroot%\system32\clbcatq.dll

Other Details

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Licenses

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{5A8A1D95-22E9-3963-2E06-90BDD094E562}\InprocServer32

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

19.344.05

FIRST VSAPI PATTERN DATE:

16 May 2024

VSAPI OPR PATTERN File:

19.345.00

VSAPI OPR PATTERN Date:

17 May 2024

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Delete this registry value

[ Learn More ]

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
    • Taskman = %Application Data%\vfbu.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
    • {K7C0DB872A3F777C0} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{5A8A1D95-22E9-3963-2E06-90BDD094E562}\InprocServer32
    • ThreadingModel = "Both"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
    • {I510F7641510D2FD4} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion\Parameters
    • TrapPollTimeMilliSecs = 15000
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{5A8A1D95-22E9-3963-2E06-90BDD094E562}\InprocServer32
    • (Default) = %systemroot%\system32\clbcatq.dll

Step 4

Delete this registry key

[ Learn More ]

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_LOCAL_MACHINE\Software\Licenses
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{5A8A1D95-22E9-3963-2E06-90BDD094E562}\InprocServer32

Step 5

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %Application Data%\vfbu.exe

Step 6

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.PINCAV.GD. 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 the following Trend Micro Support pages for more information:


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