TrendLabs Malware Blog
Glossary
TrendWatch
TrendLabs Twitter
SYMBOS_YXES.B
Technical Details

File type: SIS

Memory resident:  No

Size of malware: Varies

Initial samples received on: Jul 12, 2009


Payload 1: Displays graphics


Payload 2: Terminates processes



Details:

This Symbian malware may be downloaded unknowingly by a user when visiting malicious Web sites.

It is a Symbian Information Source (SIS) file that collects the following information on the affected mobile device:

  • Phone identification
  • Subscriber identification
  • Network Information

Upon execution, it displays the following image prompting the user to install the malicious software.

It then drops the following components:

  • C:\sys\bin\Installer_0x20026CA6.exe - installer component
  • C:\sys\bin\AcsServer.exe - detected as SYMBOS_YXES.B
  • C:\private\101f875a\import\[20026CA5].rsc - allows startup of AcsServer.exe upon turning on the device.

It remains running in the background and attempts to connect to the Internet and from there can get possible messages, which it can spam and send to contacts found in the compromised device.

It may also compose messages that can be part of its spamming routine.

It also terminates the following processes if found running in the system:

  • AppMngr
  • TaskSpy
  • Y-Tasks
  • ActiveFile
  • TaskMan

Part of its lure to the users is the Supplier information, which points to "Playboy".

It affects mobile devices running the Symbian operating system.

Analysis By: Michael Cabel

Updated By: Jessa De La Torre


For additional information about this threat, see:
Overview
Solution

Search a new malware

Tell us how we did. Take our quick survey.