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TROJ_INJECTO.BOF

August 06, 2013
 Analysis by: Jimelle Monteser
 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:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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.

  TECHNICAL DETAILS

File Size:

126,976 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

29 Jul 2013

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.

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
barckH

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

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
Settings

HKEY_LOCAL_MACHINE\Software\Microsoft\
Active Setup\Installed Components\{random}

It adds the following registry entries:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Active Setup\Installed Components\{random}
StubPath = "%Windows%:cmdnetview.exe"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}e.{BLOCKED}view.com

NOTES:
It creates the following Alternate Data Stream (ADS) copy of itself:

  • %Windows%:cmdnetview.exe

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

10.192.05

FIRST VSAPI PATTERN DATE:

02 Aug 2013

VSAPI OPR PATTERN File:

10.193.00

VSAPI OPR PATTERN Date:

03 Aug 2013

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
    • Local AppWizard-Generated Applications
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components
    • {random}

Step 4

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_INJECTO.BOF. 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 5

To delete ADS files:

  1. Download Streams.exe from this Microsoft page.
  2. Extract the contents of this file to a location of your choice.
  3. Open a command prompt window. To do this:
    • On Windows 2000, XP, and Server 2003:
      Click Start>Run. In the input box, type CMD, and press Enter.
    • On Windows Vista and 7:
      Click the Windows button, type CMD in the search box, and press Enter.
  4. In the command prompt, type the following, then press Enter:
    CD {Path where contents of downloaded file was extracted}
  5. Still in the command prompt type the following then press Enter:
    Streams.exe -d
    • %Windows%
  6. Type exit then press Enter.


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