Thread by @fs0c131y

The @OnePlus #clipboard app contains a strange file called badword.txt 🤔

In these words, we can find: Chairman, Vice President, Deputy Director, Associate Professor, Deputy Heads, General, Private Message, shipping, Address, email, ...

pastebin.com/kfvJWKJB

This badword.txt is duplicated in a zip file called pattern. This archive contains 7 files:
- badword.txt
- brackets.txt
- end.txt
- follow.txt
- key.txt
- start.txt

All these files are used in a obfuscated package which seems to be an #Android library from teddymobile

TeddyMobile is a Chinese company, they worked with a lot of manufacturers including @oppo.

teddymobile.cn

As far as I understand, teddymobile is making number identification in SMS

The picture below can be translated like this:
- Total number of SMS 20M+
- SMS identification accuracy 100%
- Identification number recognition rate of 70%
- recognition accuracy of 95%

According to the code @OnePlus is sending your IMEI and the phone manufacturer to a Chinese server owned by teddymobile 😡

In the TeddyMobile's package com.ted, they have a class called SysInfoUtil. This class contains the following methods:
- getAndroidID
- getCPUSerial
- getDeviceId
- getHardwareSerialNumber
- getIMEI
- getIPAddress
- getMacAddress
- getPhoneNumbe
- getScreenPixels

Except getIPAddress and getScreenPixels, all the other methods are used.
They also send JSON messages to their servers with a "telephone" and "messageText" fields...😡

This is a good reminder...Please don't copy paste your bank account number...TeddyMobile has a dedicated method to recognize a bank account...😡

I uploaded the @OnePlus #clipboard APK on @koodous_project

koodous.com/apks/2f8a01035…

I didn't manage to trigger the network communications to the teddymobile servers but I will continue later. Moreover, I have other ideas in mind regarding this app 😉

After deeper investigation only a small part of the tedmobile sdk is used. In the ClipboardManager, in the verifyExpress method they used the method parserOnline.

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This parserOnline will send what you have in your clipboard to a teddymobile server in order to parse it. It important to say that this method is used only for Chinese users.

So we can definitively say that clipboard data of @OnePlus Chinese users is send to teddymobile servers without their consent.

The conditions to send your data to teddymobile server are:
- clip data is not numeric
- not an email
- Chinese @OnePlus phone
- clipboard data matched the express pattern.

It good to say that parserOnline method is used 3 times in the code, so this is only 1 of the 3 usecases