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Threat Encyclopedia

ANDROIDOS_TORBOT.A

ANALYSIS BY

Weichao Sun


THREAT SUBTYPE:

Information Stealer

PLATFORM:

Android OS

OVERALL RISK RATING:
DAMAGE POTENTIAL:
DISTRIBUTION POTENTIAL:
REPORTED INFECTION:
INFORMATION EXPOSURE:

  • Threat Type:Trojan

  • Destructiveness:No

  • Encrypted: No

  • In the wild: Yes

OVERVIEW

Infection Channel:

Dropped by other malware


This is the first Android malware discovered to abuse the TOR network in order to conceal its connection to its C&C server. Users affected by this malware may find the security of their mobile devices compromised.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This malware leverages the TOR network to connect with a remote server. It may be installed manually by a user.

TECHNICAL DETAILS

File Size:

4,885,996 bytes

File Type:

APK

Memory Resident:

Yes

Initial Samples Received Date:

17 Mar 2014

Payload:

Compromises system security

NOTES:

This malware leverages the TOR network to connect with a remote server.

After installation, it shows the following common Android icon:

It runs at every system boot up. When first executed, it requests an administrator level permission and hide its icon from launcher.

It listens to SMS command from a remote C&C server. Based on the command, this malware may perform the following routines:

  • Send out all the installed apps
  • Start/stop steal sms
  • Make phone call
  • Start/stop intercept and steal SMS
  • Send SMS to a certain number provided by remote command
  • Update C&C number

All the responses of these commands are sent out via TOR network to the remote server.

SOLUTION

Minimum Scan Engine:

9.700

VSAPI OPR PATTERN File:

1.683.00

Step 1

Trend Micro Mobile Security Solution

Trend Micro Mobile Security Personal Edition protects Android smartphones and tablets from malicious and Trojanized applications. The App Scanner is free and detects malicious and Trojanized apps as they are downloaded, while SmartSurfing blocks malicious websites using your device's Android browser.

Download and install the Trend Micro Mobile Security App via Google Play.

Step 2

Remove unwanted apps on your Android mobile device

[ Learn More ]

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