TSPY_FAREIT.OPS

May 23, 2014
 ALIASES:

PWS:Win32/Fareit (Microsoft); Generic.sq (McAfee); Trojan.Zbot (Symantec); Trojan-Spy.Win32.Zbot.skod (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Zbot.ISH (AVG)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • 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

File Size:

182,616 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

23 May 2014

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 creates the following folders:

  • v
  • ??
  • ?a

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
knumbiw = "rundll32 %Application Data%\knumbiw.dll,knumbiw"

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\WinRAR

HKEY_LOCAL_MACHINE\SOFTWARE\Chcvifhsno

HKEY_CURRENT_USER\SOFTWARE\Chcvifhsno

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
??????

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
??????\Recent File List

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
??????\Settings

HKEY_CLASSES_ROOT\.stm\ShellNew

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
??????\LAYOUT

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\knumbiw

It adds the following registry entries:

HKEY_CURRENT_USER\Software\WinRAR
HWID = "{random values}"

HKEY_CURRENT_USER\Software\WinRAR
Client Hash = "{random values}"

HKEY_CURRENT_USER\Software\WinRAR
FFBE27978CC9C253285588AECD6B2726 = "{random values}"

HKEY_CURRENT_USER\Software\WinRAR
7DC720D62553119EFA2CA180237CC530 = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Chcvifhsno
License = "d54f"

HKEY_CURRENT_USER\Software\Chcvifhsno
License = "d54f"

HKEY_CLASSES_ROOT
STMEditor.Document = "STMEdi Document"

HKEY_CLASSES_ROOT
STMEditor.Document\DefaultIcon = "%User Temp%\133796.exe,0"

HKEY_CLASSES_ROOT
STMEditor.Document\shell\open\command = "%User Temp%\133796.exe %1 "

HKEY_CLASSES_ROOT
STMEditor.Document\shell\print\command = "%User Temp%\133796.exe /p %1 "

HKEY_CLASSES_ROOT
STMEditor.Document\shell\printto\command = "%User Temp%\133796.exe /pt %1 %2 %3 %4 "

HKEY_CLASSES_ROOT
.stm = "STMEditor.Document"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\knumbiw
Impersonate = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\knumbiw
Asynchronous = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\knumbiw
MaxWait = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\knumbiw
cymandje = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\knumbiw
DllName = "%Application Data%\knumbiw.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\knumbiw
Startup = "knumbiw"

Dropping Routine

This spyware drops the following files:

  • %User Temp%\129031.exe
  • %User Temp%\133796.exe

(Note: %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.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://{BLOCKED}-gimbl.com/b/shoe/54607
  • http://{BLOCKED}-gimbl.com/components-jumla-bq/jquery
  • {BLOCKED}5.210.32
  • {BLOCKED}1.164.53
  • {BLOCKED}7.126.220
  • {BLOCKED}0.241.32
  • {BLOCKED}.249.61
  • {BLOCKED}.1.90
  • {BLOCKED}2.67.103
  • {BLOCKED}.228.82

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.700

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

Restart in Safe Mode

[ Learn More ]

Step 3

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_CURRENT_USER\Software
    • WinRAR
  • In HKEY_LOCAL_MACHINE\SOFTWARE
    • Chcvifhsno
  • In HKEY_CURRENT_USER\SOFTWARE
    • Chcvifhsno
  • In HKEY_CURRENT_USER\Software
    • Local AppWizard-Generated Applications
  • In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
    • ??????
  • In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\??????
    • Recent File List
  • In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\??????
    • Settings
  • In HKEY_CLASSES_ROOT\.stm
    • ShellNew
  • In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\??????
    • LAYOUT
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify
    • knumbiw

Step 4

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • knumbiw = "rundll32 %Application Data%\knumbiw.dll,knumbiw"
  • In HKEY_CURRENT_USER\Software\WinRAR
    • HWID = "{random values}"
  • In HKEY_CURRENT_USER\Software\WinRAR
    • Client Hash = "{random values}"
  • In HKEY_CURRENT_USER\Software\WinRAR
    • FFBE27978CC9C253285588AECD6B2726 = "{random values}"
  • In HKEY_CURRENT_USER\Software\WinRAR
    • 7DC720D62553119EFA2CA180237CC530 = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Chcvifhsno
    • License = "d54f"
  • In HKEY_CURRENT_USER\Software\Chcvifhsno
    • License = "d54f"
  • In HKEY_CLASSES_ROOT
    • STMEditor.Document = "STMEdi Document"
  • In HKEY_CLASSES_ROOT
    • STMEditor.Document\DefaultIcon = "%User Temp%\133796.exe,0"
  • In HKEY_CLASSES_ROOT
    • STMEditor.Document\shell\open\command = "%User Temp%\133796.exe %1 "
  • In HKEY_CLASSES_ROOT
    • STMEditor.Document\shell\print\command = "%User Temp%\133796.exe /p %1 "
  • In HKEY_CLASSES_ROOT
    • STMEditor.Document\shell\printto\command = "%User Temp%\133796.exe /pt %1 %2 %3 %4 "
  • In HKEY_CLASSES_ROOT
    • .stm = "STMEditor.Document"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\knumbiw
    • Impersonate = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\knumbiw
    • Asynchronous = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\knumbiw
    • MaxWait = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\knumbiw
    • cymandje = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\knumbiw
    • DllName = "%Application Data%\knumbiw.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\knumbiw
    • Startup = "knumbiw"

Step 5

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %User Temp%\129031.exe
  • %User Temp%\133796.exe

Step 6

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • v
  • ??
  • ?a

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_FAREIT.OPS. 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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