TROJ_EXTADB.US

April 22, 2013
 Analysis by: Adrianne Chester Camat
 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:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

49,026 bytes

Memory Resident:

Yes

Initial Samples Received Date:

16 Apr 2013

Arrival Details

This Trojan may be dropped by the following malware:

  • TROJ_FAKEADB.US

Other Details

This Trojan connects to the following website to send and receive information:

  • http://www.{BLOCKED}ked.net/askfm.php?%7brandom numbers}
  • http://www.{BLOCKED}ked.net/user.php?%7brandom numbers}
  • http://www.{BLOCKED}ked.net/youtube.php?%7brandom numbers}
  • http://www.{BLOCKED}ked.net/twitter.php?{random numbers}

NOTES:
This Google Chrome extension prevents the user from viewing the extensions page and just redirects the webpage to https://chrome.google.com/webstore, thus preventing user from uninstalling the malicious extension.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.860.06

FIRST VSAPI PATTERN DATE:

16 Apr 2013

VSAPI OPR PATTERN File:

9.861.00

VSAPI OPR PATTERN Date:

17 Apr 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

Remove malware/grayware files that dropped/downloaded TROJ_EXTADB.US

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_EXTADB.US. 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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