Threat Descriptions

Trojan-Spy:SymbOS/Flexispy.A

Classification

Category :

Malware

Type :

Trojan-Spy

Platform :

SymbOS

Aliases :

Trojan-Spy:SymbOS/Flexispy.A

Summary

Trojan-Spy:SymbOS/Flexispy.A is a spyphone application that allows a user to monitor calls and messages on a targeted phone. The application must be manually installed on the phone in order for the program to operate.

Removal

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details

Note: there are newer versions of FlexiSPY than the variant described here. Later versions exhibit different behavior and are not classified as malware.

Installation

Flexispy.A is installed in a standard SIS package and when installed the application uses the name "phones". It does not give any indication as to what is being installed.

After installation the application will immediately go into hiding and locks its files so that the application uninstaller cannot remove it.

The user interface of Flexispy.A is only accessible by entering a special code in the phone number field.

In the user interface, the attacker can control when the spying application reports and what information is recorded.

Recording the Victim's Communication

Flexispy.A records both voice call and SMS information and sends the details to the FlexiSpy server. From there the information can be accessed through a web browser.

Recording Voice Calls

Flexispy.A records the following details from the victim's voice calls:

  • IMEI
  • Client time
  • Server time
  • Direction
  • Duration
  • Phone number
  • Contact name in the victim's phonebook

Recording SMS

Flexispy.A records the following details from the victim's SMS message traffic:

  • IMEI
  • Client time
  • Server time
  • Direction
  • Duration
  • Phone number
  • Contact name in the victim's phonebook
  • Contents of SMS messages