MGDropper.B

Classification

Category :

Malware

Type :

Platform :

Aliases :

MGDropper.B, SymbOS/MGDropper, Metal Gear trojan

Summary

MGDropper.B is a minor variation of MGDropper.A trojan that was found in December 2004.

Removal

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Technical Details

MGDropper.B is a malicious SIS file dropper, that disables most well known third party file managers and Anti-Virus software, installs Cabir.X and drops MGDropper.A trojan.

The Cabir.X is started automatically when the MGDropper is installed and will start spreading. When Cabir.X spreads from MGDropper infected phone, the SIS files it sends will contain only the Cabir.X not MGDropper.

MGDropper.B tries to disable F-Secure Mobile Anti-Virus by replacing it's files with non-functional versions. However as F-Secure Mobile Anti-Virus is capable of detecting Cabir.X contained by MGDropper using generic detection. The Anti-Virus will detect the infected SIS file and prevent it from being installed. Provided that the Anti-Virus is in realtime scan mode as it is by default.

The Cabir.X worm dropped by MGDropper is already detected with generic detection as Cabir.Xen. So the MGDropper is already detected and stopped without need for updated Anti-Virus database.

Installation to system

When installed MGDropper will replace most common third party file managers,Anti-Virus programs and application installer with non-functional versions.

Spreading in: MetalGear_by_scar69.sis

Payload

Drops MGDropper.A

Disables following applications:

Simworks Anti-Virus
F-Secure Mobile Anti-Virus
Application installer
Cabirfix
Decabir
F-Cabir
FExplorer
File manager
Smart file manager
System Explorer

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