Worm:SymbOS/Commwarrior

Classification

Malware

Worm

SymbOS

SymbOS/Commwarrior

Summary

SymbOS/CommDropper.J is a SIS file trojan that drops SymbOS/Commwarrior.E onto the device.

Automatic action

F-Secure Mobile Security detects Commwarrior and will delete the worm's components.

  • Download F-Secure Mobile Security and activate it
  • Scan the phone and remove any components of the malware
  • Reboot the phone to remove memory resident components

After disinfection, you can remove any remaining empty directories by opening the phone's application manager and uninstalling the SIS file in which Commwarrior arrived. https://mobile.f-secure.com/disinfection/fcommwarrior.html

Suspect a file is incorrectly detected (a False Positive)?

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 detection database 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.

For more Support

Community

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User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

For representative examples of variants in the Commwarrior family, please see the descriptions below:

Many of the variants in this family are closely related. For example, variant Commwarrior.E is closely related to Commwarrior.C

Propagation (Bluetooth)

When replicating over Bluetooth, the worm uses the device's native Bluetooth functionality to search for other Bluetooth-discoverable devices within the Bluetooth wireless range. The worm then attempts to send infected SIS files to the discovered devices.

The SIS files Commwarrior transmits are randomly named so that phone users cannot be warned to avoid files with any particular given name.

Propagation (MMS)

When replicating over MMS, Commwarrior sends out MMS messages containing the infected SIS file. On opening the MMS message, the recipient then becomes infected.

Based on the variant, Commwarrior may send an infected MMS message to all users listed in an infected phone's contact book; to anyone who sends a message to the infected user; or to anyone the infected user contacts.