arrow_back
search
close

TSPY_DELF.BOI

October 10, 2012
 ALIASES:

VirTool:Win32/Obfuscator.C (Microsoft); Generic PWS.o (McAfee); Suspicious.MH690, Suspicious.DLoader (Symantec); PAK:UPack, Backdoor.Win32.Hupigon.cab (Kaspersky); Packed.Win32.Upack (v) (Sunbelt); Generic.PWStealer.F0D35FB7 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 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:

27,251 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

09 Sep 2012

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.

Other System Modifications

This spyware adds the following registry keys:

HKEY_CLASSES_ROOT\CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}

HKEY_CLASSES_ROOT\CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}\
InPrqcServer32

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}\InPrqcServer32
ThreadingModel = "Apartment"

Dropping Routine

This spyware drops the following files:

  • %Program Files%\Common Files\Microsoft Shared\MSINFO\rejoice.vxd

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

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_CLASSES_ROOT\CLSID
    • {08315C1A-9BA9-4B7C-A432-26885F78DF28}
  • In HKEY_CLASSES_ROOT\CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}
    • InPrqcServer32

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\Classes\CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}\InPrqcServer32
    • ThreadingModel = "Apartment"

Step 4

Search and delete this file

[ Learn More ]
There may be some component 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.
  • %Program Files%\Common Files\Microsoft Shared\MSINFO\rejoice.vxd

Step 5

Scan your computer with your Trend Micro product to delete files detected as TSPY_DELF.BOI. 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.


Did this description help? Tell us how we did.