Database Users

Anyone heard of a android virus/trojan yet?

Sometimes I come across an app thats not on the Android market and you have to install it manually. Has anyone come across a virus/trojan on Android yet? Im curious how easy or hard it is to modify a legit applications and put a virus/trojan in it?

Lol have not seen one yet. Android isn't that big yet so doubt hackers would really spend time putting trojans to get stuff like your email password lol.

Take everything you know about microshaft windoze and forget it. The system architecture of android is almost completely invulnerable to viruses/worms/etc.
In a typical unix system, hacks can take one of very few possible approaches;
1) service bug targeting, i.e., if one were to discover a security vulnerability in the Apache HTTP server, one could theoretically compromise it. That particular service I mean.
2) user account targeting, i.e., one could convince a user to run something dangerous, which would infect that specific user's account, of course, this attack would limit itself to damaging that user's personal data and would not be able to take down the whole system unless it also targeted a kernel or X-server exploit.
Note specifically regarding #1, that in a well configured system, that targeting a particular service would be restricted to a specific user account just as in #2 since each service runs as its own username.
3) Targeting KERNEL defects; this is perhaps the most frightening possibility. It is also the least likely since it would also require #1 or #2. Any particular kernel attack, particularly in Linux is also very unlikely to work for long due to the open sourced nature of Linux. There are a LOT more people involved in monitoring the fundamental securities of the Linux kernel than any other OS because of its open nature. It is also a source of PRIDE for kernel HACKERS that they ALSO be responsible for openly providing the SOLUTION to any exploits that they discover. And they usually do this with their REAL NAME since it basically immortalizes them. The end result is that every time a kernel exploit is discovered, it tends to be patched within hours of its first application.
Now of course you want to know how this affects Android, since by all appearances, there is no user-level security. WRONG. The Android security level is actually on par with service level security on unix servers. EVERY SINGLE application installed is granted is own user account, which means that if any particular application is dangerous, its range of damage is restricted to that particular application's private data, as well as any permissions that the application is explicitly granted (i.e. when you install an application, it gives you the required security list). There is also the very slim possibility of a kernel exploit (though this is extremely unlikely), and it could damage the data on the sdcard (since it is an MS-crap filesystem with no security restrictions).
Of course you will note that older versions of the ADP1 system image came with an unregulated 'su' command (which you could also end up with using a "cat sh > su; chmod 4755 su" root approach) which basically can be used by any application to take over the whole system. Make sure that you don't have any such su command on your droid. Either use a password-protected su command (which will cause problems for trusted apps requesting root privileges), or the gui-supported su command. Subsequent ADP1 images came with an su command that was restricted to the debugging terminal user, which is fine.
In other words... you don't have much to worry about. Just don't do anything really stupid, like installing an untrusted application that wants a boat load of privileges that it shouldn't be asking for.

lbcoder said:
EVERY SINGLE application installed is granted is own user account, which means that if any particular application is dangerous, its range of damage is restricted to that particular application's private data, as well as any permissions that the application is explicitly granted (i.e. when you install an application, it gives you the required security list).
Click to expand...
Click to collapse
Might be worth pointing out that android apps are for the most part interpreted language apps, meaning the onus of security and stability (just from an apk standpoint) falls largely on the vm. All the lower level subsystems are pretty well protected by the Linux kernel, and these have been significantly tried in fire by decades of Linux server deployment.

lbcoder said:
The system architecture of android is almost completely invulnerable to viruses/worms/etc.
Click to expand...
Click to collapse
jashsu said:
Might be worth pointing out that android apps are for the most part interpreted language apps, meaning the onus of security and stability (just from an apk standpoint) falls largely on the vm. All the lower level subsystems are pretty well protected by the Linux kernel, and these have been significantly tried in fire by decades of Linux server deployment.
Click to expand...
Click to collapse
All the points about the protection offered from the Linux kernel and the VM are valid. Computer secuity is an ongoing battle between the software originators and the hackers trying to get in. I'm not saying it's remotely likely, particularly due to the market share, but rule one in my book is don't taunt the hackers.

lbcoder said:
Take everything you know about microshaft windoze and forget it. The system architecture of android is almost completely invulnerable to viruses/worms/etc.
Click to expand...
Click to collapse
Until the Android Dev team screw up again and lets any app run in the system process when requested (which was why cupcake was delayed in the US).

thanks for the post.
I was curious if someone could unpack a .apk file and modify a application easily, say have it send personal info to xyz server instead of the server the app was designed for or send it to both servers so the user doesnt think anything is wrong.
Are the files in the .apk editable, like an .exe is compiled for windows and the .exe cannot be edited (since its machine code).

androidmonkey said:
thanks for the post.
I was curious if someone could unpack a .apk file and modify a application easily, say have it send personal info to xyz server instead of the server the app was designed for or send it to both servers so the user doesnt think anything is wrong.
Are the files in the .apk editable, like an .exe is compiled for windows and the .exe cannot be edited (since its machine code).
Click to expand...
Click to collapse
Yes, apks are basically just zip files with cryptographic signatures. If you get your apks from Market then there is little to no risk of apks being tampered with. If you install your apks from any source other than Market, then you just have to trust the source that the apk hasn't been modified. Obviously if the apk itself doesn't ask for many permissions then it shouldn't be a problem. For example if you download a game apk from a developer's personal webpage and it asks for just permission to keep the screen alive, there's little risk to your data. However if you download an app that has read/write access to your contacts, or has root access, then you better be sure that the site you get it from is trustworthy.

jashsu said:
Yes, apks are basically just zip files with cryptographic signatures. If you get your apks from Market then there is little to no risk of apks being tampered with. If you install your apks from any source other than Market, then you just have to trust the source that the apk hasn't been modified. Obviously if the apk itself doesn't ask for many permissions then it shouldn't be a problem. For example if you download a game apk from a developer's personal webpage and it asks for just permission to keep the screen alive, there's little risk to your data. However if you download an app that has read/write access to your contacts, or has root access, then you better be sure that the site you get it from is trustworthy.
Click to expand...
Click to collapse
So the files in the .apk not executables, rather interpreted with the VM? Im curious if those files can be read and changed. For instance, can someone open the file in a Java SDK and change the code? Or are those files protected so they cant be modified? For instance, could you download soundboard app from the Market, "unzip" the .apk, and put your own sounds in it?

androidmonkey said:
So the files in the .apk not executables, rather interpreted with the VM? Im curious if those files can be read and changed. For instance, can someone open the file in a Java SDK and change the code? Or are those files protected so they cant be modified? For instance, could you download soundboard app from the Market, "unzip" the .apk, and put your own sounds in it?
Click to expand...
Click to collapse
Unless the classes are specifically performing security/sanity checks, there's nothing keeping you from replacing asset files (pngs, wavs, etc) and then resigning the apk with any key of your choosing. However, altering xmls and classes is more difficult as they are obfuscated/optimized by default.
For apps distributed officially through the Android market, the only way Google can provide assurance for the app producer against tampering is app-protected folder. Of course that assumes that root access is not provided, which is most likely a prerequsite for any phone to be branded "with Google" and have Market access. From the viewpoint of the consumer, apps are guaranteed by Google against tampering only if retrieved through Market. Once the app is on the device, it is protected via Android's use of Linux user access permission model (each app is its own user). The consumer may of course alter the file him/herself, unless it is a protected app, in which case root is required.

sounds buggy. i hope not. this reminds me of when Mozilla firefox became popular i slowly starte dto see code become available to make pop ups n my belloved browser

Virus found on Android phone...
Article 1:
NEWS
An employee at Spanish antivirus firm Panda Security received a new Android-based Vodafone HTC Magic with malware on it, according to researchers at Panda Labs.
"Today one of our colleagues received a brand new Vodafone HTC Magic with Google's Android OS," researcher Pedro Bustamante wrote on the Panda Research Blog on Monday.
"The interesting thing is that when she plugged the phone to her PC via USB, her Panda Cloud Antivirus went off, detecting both an autorun.inf and autorun.exe as malicious," he wrote. "A quick look into the phone quickly revealed it was infected and spreading the infection to any and all PCs that the phone would be plugged into."
Article 2:
Mariposa virus back on Vodafone Android smartphones
HTC Magic According to a Spanish blogger, around 3,000 memory cards supplied by Vodafone Spain were infected with the Mariposa bot client. The mobile network operator has now reportedly confirmed that these included HTC Magic Android-based smartphone models, as well as other devices. A spokesperson for the company has told CNET that it is a "local incident". Vodafone says it has identified customers that could potentially be affected and it will be sending them new memory cards. It has also offered to supply them with tools to restore the integrity of their devices.
Reports of an HTC Magic smartphone carrying the virus were first published less than two weeks ago, however the malware is not able to harm the Android smartphone itself. The bot only attempts to contact a command & control server when connected to a Windows PC. The virus should be detected by most up-to-date anti-virus solutions.
Personal take:
Interesting to note that the virus being carried on an Android phone and was used to infect PC's NOT other Android phones. It came straight from manufacturing with the virus on, so as of yet I still haven't heard of a virus that can infect an android phone.
Further more, I have seen Anti-virus software on the market place AND being offered by Norton. What do they protect against if there are no known virus threats? Do they just draw a nice pretty anti-virus logo on the screen to make you feel comfy? hehehe.

Trojans in the hacked up ROMs people are distributing
androidmonkey said:
Sometimes I come across an app thats not on the Android market and you have to install it manually. Has anyone come across a virus/trojan on Android yet? Im curious how easy or hard it is to modify a legit applications and put a virus/trojan in it?
Click to expand...
Click to collapse
I've found a trojan in at least one of the ROMs being distributed on here. Even reported directly from the developer's own file sharing site.
"Stock" ROM http://forum.xda-developers.com/showthread.php?t=2066023
Attached is a photo of the file scanned from the linked file sharing site for the KERNEL he wants you to INSTALL!!
Click the link to JB_KERNEL_3.17.841.2_EVITA_Init.d_Support_Installer.zip - 8.54 MB in that thread and see for yourself.
Be careful what you install on your device. ANDR.Trojan.GingerBreak takes full administrative control of your device and downloads more trojans to siphon out your private personal data.

[Q] Strange App

I've just tried an app from a website out of stupidity and it totally took over my phone. It just kept loading a webpage over and over until I killed the app. I'm just concerned about my Nexus and my data.
Has anyone heard of http://leviathansecurity.com and the nopermissions.apk?
Stock and unrooted.

I haven't heard of that website but I think you should uninstall that app rather than just closing it.
I downloaded a bad app as well last week but it deleted all my SD content, photos and music etc
Now I only install Apks from here on XDA and play store of course

here's link about that apk,
leviathansecurity.com/blog/archives/17-Zero-Permission-Android-Applications.html
3 functions
reads sd data,
reads what apps install and access their data
device information
then sends info via url by opening webpage to send data
its just to show how easy it is to give access to your information for apps that abuse permissions or even given none like this apk, this one is intentional to show the loop holes
I didn't realise how easy it was, rooted is evem worse

GMonkey said:
I've just tried an app from a website out of stupidity and it totally took over my phone. It just kept loading a webpage over and over until I killed the app. I'm just concerned about my Nexus and my data.
Has anyone heard of http://leviathansecurity.com and the nopermissions.apk?
Stock and unrooted.
Click to expand...
Click to collapse
DELETE that app, make sure the apk is gone too.
When you approved side loading of apks, your good phone warned you to be careful with what you ok to install, no?
Install Lookout as well and let it do a full scan, you never know..

Leviathan security, and the no permissions app, is a test application to show how zero permission apps can still read and steal data from your phone without permissions. AFAIK it isn't malicious, just a test app to show how easy it is for 0 permission apps to steal your data. Just uninstall the APK. More info here: http://leviathansecurity.com/blog/archives/17-Zero-Permission-Android-Applications.html

Thanks Peeps, It did seem legit on the site before I installed it. It's just the fact it took over my browser for a bit. The app was removed but, would there be a need to hard reset or anything like that? I'm normally rooted and have a data firewall to block anything outgoing on certain apps but, with the N4 being so good as it is I've put it off until I can no longer resist the urge.

What does Google Play really need to work properly

Hello there
I'm about to strip my system of any useless (for me) function and/or app and restrict every possible spying activity.
I messed around with the system and deactived alot of bulk and spam. I also restricted all the stupid triggers with autostarts.
Don't know If anyone saw all the things going on behind the surface, using all the following things to analyse:
I'm using several apps to do so. Xprivacy, Android Firewall, Autostarts, Root Cleaner, Android Tuner, Root Uninstaller, LBE-Security Master and Root Explorer.
So my question to someone with experience is:
What exactly does the google play and also the google framework needs to work properly ?
Would be nice to know that.
cya

seems to be a big secret... ? I think, there are several commands in this play store like, if this app or this function does not get X, return "no connection", even if it got its connection...
no one knows ?
I think it is important to know...

[Q] Virus or Android now Untamed?

Hello Good People of XDA
I have been a i9506 owner for quite long, had a 9100 before,
I am used to root and mess with apps to customize things to my wim,
at the best of my knowledge (I lack android programming skills, but I can do things with terminal and filesystems).
All that before to say I am not totally a noob, but my lack of technical knowledge might bite me there.
System wise, I am under 4.2.2, rooted, unknow sources are not allowed, system check for apps is allowed,
I have an antivirus (more than one, but only one works each day, just to be sure I don't miss things)...
My problem is that I recently found out that some apps, actually system apps, blocked
with Titanium backup, or with gemini app manager, or app quarantine,
were actually running anyway.
They are marked as blocked in my app manager, but can still be force closed,
and they appear in battery displays (most of these under the android system block, in the list of services/apps used),
and in process running when using Ccleaner apps.
Also, my battery display show GPS is activated, while when I go into options, all boxes are off or unticked.
I thus wonder what's happening?
How is it possible to have these schrödinger apps tamed and blocked like I want them.
I want these to shut down and only work when I DO ALLOW these, for them not to suck my battery or do unauthorized chores like tracking me when I don't want.
How is it possible that they even behave like that? In i9100, I never observed that in Android 4.0.
I wonder if Google didn't change the workings for making us unable to disactivate what we don't want to work, which was pissing them off.
They already change the permissions displays in the market so permissions as intrusive as "contacts/sms message/USB stockage" are considered "not relevant/important",
while they are depending on the announced display of the app.
But I don't want to go on the "conspiracy route" (I am not like that, I am a pragmatist and I just observe facts, like these apps, with sensitive access, not being able to be deactivated), so let's focus on the technical part:
such apps were Maps, Samsung sync adapters, NFC service , Google Agenda/Contact synchronisation, sysscope, context provider, etc.
That's a lots of things that are supposed to communicate to cloud or other devices, with feels lot like a gaping flaw in the armor...
I want a phone and a tool, not something that track me or put me at risk of being stolen by somebody with technical knowledge.
Am I alone?
Thanks for any insights.

Blocked apps still working
I don't know if my title was too unclear, so I would like to change the title but am unable to do so?
Is it please possible for a moderator to do it (with the title of this post)?
Thanks by advance.
I feel like it is a true problem not being able to block some apps,
or even more, to believe they are blocked while they perfectly perform in the background,
and display activity only in secondary reports, not under their respective "buttons"/information tabs.
I wonder abourt the technical reason to such behavior.

Then delete those apps or block some of the permissions with an app (eg Privacyguard).
It's my opinion that an antivirus app (at the moment) is a waste of resources. Just think before you install something. Also if you are worried about security, you should always run the latest version of Android. 4.2.2 is an old version.

Lennyz1988 said:
Then delete those apps or block some of the permissions with an app (eg Privacyguard).
It's my opinion that an antivirus app (at the moment) is a waste of resources. Just think before you install something. Also if you are worried about security, you should always run the latest version of Android. 4.2.2 is an old version.
Click to expand...
Click to collapse
Thanks for your answer.
Well I don't want to delete system app when they might be useful at time.
I just want them to behave correctly, that is, not work when they are blocked.
That is not a solution to say "uninstall this", while the true problem is Android general behavior here.
I didn't installed system apps, they came with the thing, and all of them are not bloatware.
"NFC service" is something I want to keep for when I am ready to use it,
but I don't want to let it free and unleashed because of the opening it leaves on my phone.
Same goes for bluetooth, synced backups and so on.
I don't want backups on the cloud, so I deactivated the options, and blocked the apps.
Why are they running? It is not normal!
And my old version is maybe not secure, but actually trying 4.3 hasn't changed anything,
and I only suspect this to be some "new feature".
The antivirus is a waste for scans, I agree, still it has useful firewall features that justifies in itself its uses.

How to Scan Modded Apps for Malware, Vulnerabilities & Data Leakages

Hi All,
While installing Modded apps from Mobilism or any other forums first I used to scan at VirusTotal. If it shows below 3 or 4 detection then I would install app in my phone.
But I have doubt from many days, Is it enough to detect the both virus, malware and Data leakages like IMEI.
How to scan and analyze the APK file before installing and make sure it is safe to use on our device.
Is there any chance that modded apps uploading in forums can transmit our data like photos and videos to private servers? Can we know that by scan and analyzing the APK?
Please help me to know these details.
How to check these details of app behaviour?

I think look at permission of these apks with original apk, to more look at deep, isnt it?