Threat Descriptons



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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.


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

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  • Submit a sample

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    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

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    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.


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
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