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TROJ_ADLOAD.YX

June 17, 2013
 Modified by: Cris Nowell Pantanilla
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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.

It displays pop-up advertisements.

  TECHNICAL DETAILS

File Size:

93,745 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

04 Dec 2011

Payload:

Downloads files, Displays pop-up advertisements

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.

Installation

This Trojan drops the following files:

  • %Desktop%\¾¾³×¶ô ¹«·á¹®ÀÚ.url
  • %System%\cinerak_sms.ico

(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.)

Download Routine

This Trojan accesses the following websites to download files:

  • http://www.{BLOCKED}k.com/freesms/sub07_09.html
  • http://www.{BLOCKED}k.com/adPartner/Expose.php?pid=hanfile1
  • http://log.{BLOCKED}e.co.kr/logexp.php?aid=cineraksmsbar&kind=inst&pid=hanfile

Adware Routine

This Trojan displays pop-up advertisements.

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.622.09

FIRST VSAPI PATTERN DATE:

04 Dec 2011

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

Search and delete this file

[ Learn More ]
There may be some 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. %Desktop%\¾¾³×¶ô ¹«·á¹®ÀÚ.url
%System%\cinerak_sms.ico

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_ADLOAD.YX. 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.

NOTES:

RECOMMENDATIONS

This malware is detected and removed by the latest Trend Micro anti-malware engine and pattern. Always keep pattern files and engines up-to-date. To know more about updating your Trend Micro product's pattern, please refer to the following Trend Micro support page:


Note: The steps apply for specific products indicated in the page.

To actively detect and protect your machine, enable real-time scanning of your Trend Micro anti-malware product. Refer to the following Trend Micro support page to know more about enabling real-time scanning in your Trend Micro product:

To enable Firewall to protect against threats: How do I enable or disable the Personal Firewall of Trend Micro Internet Security?

  • Block unused ports to disallow malware from using these ports to communicate and/or enforce commands.
  • Be aware of social engineering attacks.
  • Avoid accessing the listed malicious URLs to prevent possible re-infection.
  • Monitor network connections for any suspicious connection or connectivity.
  • Regularly update list of untrusted websites.


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