TSPY_FAREIT.YYSKM
PWS:Win32/Fareit (Microsoft); Trojan.Gen.2 (Symantec); Trojan-PSW.Win32.Fareit.bbcn (Kaspersky); Mal/MSIL-OY (Sophos); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse ILHeur.AKC (AVG)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware 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
336,384 bytes
EXE
No
09 Jul 2015
Arrival Details
This spyware 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 spyware drops the following copies of itself into the affected system:
- %User Profile%\Windows\BthHFSrv.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
Other System Modifications
This spyware deletes the following files:
- {malware path and file name}:zone.identifier
- %User Profile%\Windows\NcbService.exe:Zone.Identifier
- %User Profile%\Windows\BthHFSrv.exe:Zone.Identifier
- %Windows%\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\WinRAR
It adds the following registry entries:
HKEY_CURRENT_USER\Software\WinRAR
HWID = "{random values}"
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Windows
Load = "%User Profile%\Windows\NcbService.exe"
Dropping Routine
This spyware drops the following files:
- %User Profile%\Windows\NcbService.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
This report is generated via an automated analysis system.
SOLUTION
9.750
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_CURRENT_USER\Software
- WinRAR
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\WinRAR
- HWID = "{random values}"
Step 4
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows
- Load = "%User Profile%\Windows\NcbService.exe"
Step 5
Search and delete this file
- %User Profile%\Windows\NcbService.exe
Step 6
Scan your computer with your Trend Micro product to delete files detected as TSPY_FAREIT.YYSKM. 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.
Step 7
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- {malware path and file name}:zone.identifier
- %User Profile%\Windows\NcbService.exe:Zone.Identifier
- %User Profile%\Windows\BthHFSrv.exe:Zone.Identifier
- %Windows%\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
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