Take the 2-minute tour ×
Information Security Stack Exchange is a question and answer site for Information security professionals. It's 100% free, no registration required.

What is the best way of forensically determining that spyware software has been installed on the phones without making any changes to the phone(s)?

I have Blackberry and iPhone 4 phones that are suspected of having spysuite software (CellSpyNow) installed on them. It is suspected that a former employee has installed the software on company owned phones when the phones had been left unattended.

Through other work, we have evidence that CellSpyNow web front end has been used by the individual and there are other suspicions that SMS's have been intercepted and acted upon.

Software like this is designed to provide the attacker with SMS's, call data, camera pictures and so on that is usually uploaded to a central website that is accessible by the attacker using a username/password.

share|improve this question
add comment

2 Answers

up vote 7 down vote accepted

If I were in your position, I would grab complete image(s) of the individual mobile device(s) to forensically analyze the images using another, independent system because…

  1. You do not have to install anything on the related mobile devices as you can analyze the device image(s) on your other system with any tool you like/want/need.
  2. You can modify (in the sense of “cleaning up suspicious and/or malicious data”) the image as needed and push the checked and cleaned image(s) back to the individual mobile device(s).
  3. You have image(s) of the mobile device(s) which can act — if needed — as forensic proof and legal evidence.

If you do not know how to create and analyze such device images but are almost sure that the devices are indeed compromised, it's time to get professional help from an information security specialist… your best choice will be an forensic analyst in this case.

Additionally, since you are describing a situation that could involve a commercial environment (work/company), you should also reach out for legal advise in case you actually manage to identify the person(s) who have compromised your devices.

As you might know, governmental institutions and agencies (including “ye regular police”) have access to specialists like forensic analysts. Most probably, they are your best choice when it comes to "securing proof" and "defending your rights" (in a legal sense).

The above approach has a high potential to close the loop of your security problem without too much impact, while provides you with a good stand when legal consequences start gaining importance to you.

EDIT

The following information will be of use to you:

Whatever you do, do not destroy or modify digital evidence. That's why I am advising a forensic analyst instead of doing research and analysis yourself. And let's be honest — if you were trained in digital forensics, you wouldn't have asked the question in the first place. Instead, you would have applied the 6 Phases of Incident Management…

  1. Preparation
  2. Identification
  3. Containment
  4. Eradication
  5. Recovery
  6. Training

… using the appropriate proceedings and tools.

EDIT

Due to the comment(s) talking about iPhone and iPad imaging, I would like to note that when I talk about imaging for forensics purposes, I am talking about "professional digital forensics software" that fits the individual needs and purposes of the analyst.

This is a list of currently available tools which I would use (depending on the situation and needs) for iPhone/iPad:

  • Black Bag Technology Mobilyze
  • Cellebrite UFED
  • EnCase Neutrino
  • FTS iXAM
  • iPhone Analyzer
  • iphone-dataprotection
    ~ A set of tools that can image and decrypt an iPhone. The tools can even brute-force the iPhone's 4-digit numerical password.
  • iOS Forensic Research (Available to law enforcement only!)
    ~ Among many things, Jonathan Zdziarski has released tools that will image iPhones, iPads and iPod Touch.
  • Katana Forensics Lantern
  • libimobiledevice
    ~ A library with utilities for backing up iPhones. The output format is an iTunes-style backup that can be examined with traditional tools. They are available in the Debian-testing packages libimobiledevice and libimobiledevice-utils.
  • Logicube CellDEK
  • MacLock Pick
  • Micro Systemation .XRY
  • Mobile Sync Browser
  • Nuix Desktop and Proof Finder
    ~ Tools that can detect and analyse many databases from iOS and iPhones and can directly ingest HFSX dd images.
  • Oxygen Forensic Suite 2010
  • Paraben Device Seizure
  • SpyPhone

I'll spare you listing the appropriate tools for Android, Blackberry and other mobile devices, which each have their own set of forensics tools. I'm convinced you don't really need a list of tools, since any forensics specialist knows them. If you don't, you're not a digital forensics professional… yet.

Now, if you want to dive in a bit deeper into digital forensics, you should take a look at

which provides some pretty good heads-up information for people who aren't educated in the field.

Also, you should read some books on the subject like "iPhone and iOS Forensics".

If you're still interested in digital forensics after reading a dozen of books and getting your hands dirty by trying it on your own devices, I would like to advise you to reach out for an according digital forensics education. It's an interesting field and you can trust me when I say: "it never gets boring."

share|improve this answer
    
The work is pre-trial evidence gathering - however, what I'd be interested in is how to digitally image a phone such as an iphone that can be done at a cost that makes sense for the client. –  Callum Wilson Jul 25 '13 at 11:52
    
note: clearly there are three ways of imaging an iphone: Zdziarski, jailbreak or using software like IXAM. However, Zdziarski and Jail breaking both alter the phone and the Zdziarski method only gives one access to the user file area. I've not used FTS iXAM before. Therefore, whilst it is easy to write an answer saying "image the phone" - it's actually quite a hard thing to do for later model iPhones and, as far as I can see, they only image of the user file area (which is of little interest to me) –  Callum Wilson Jul 25 '13 at 12:30
    
@CallumWilson A reply here in the comments would have been too long to fit. Therefore, I've updated my answer with an EDIT. It would be great if you could take the time read it, as I can't help getting the feeling that you have not yet professionally worked in the field and are therefore missing a big piece of the knowledge cake. Please don't get me wrong — I don't want to step on your toes… but I've professionally used all the tools I'm listing in my edit, while you can merely list 3 tools of which you've only used 2. That indicates I might be a little ahead of you in digital forensics. –  e-sushi Jul 25 '13 at 15:40
    
thanks. I've/My company has plenty of forensics and legal experience but mobile, especially iThings are new. Answer has been helpful to convince me to outsource this bit of the job and look at investing in this area in the longer term. thanks! –  Callum Wilson Jul 26 '13 at 13:15
    
@CallumWilson Glad I could contribute something useful to help. Well, good luck hunting then… ;) –  e-sushi Jul 26 '13 at 13:26
add comment

The easiest way would be to disable the cellular modem and leave them on wifi. You can then monitor the connections they make for anything going to unexpected servers. That will be significantly easier than trying to gain access to the cellular traffic.

share|improve this answer
    
This answer allows for a non-intrusive "quick check" and allows the phone to operate normally without affecting the evidence. We could ring it, SMS it and so on and look for spurious traffic with a sniffer. –  Callum Wilson Jul 24 '13 at 15:57
    
Whoever downvoted, could you please comment as to why you don't think traffic analysis is a viable way to identify a hidden piece of software that might be transmitting data to a third party? If the device can't be tampered with or trusted, monitoring it's connection to the outside world is the best bet. –  AJ Henderson Jul 24 '13 at 17:04
    
I guess he/she saw the "without making any changes" part of the question. And indeed, disabling the cellular modem and switching to WIFI is a change of configuration. On the other hand, you are correct when you write that intercepting and analyzing the traffic provides (if you know what you're doing and what to look for) a pretty good hint if a device may be compromised or not. It won't be forensic evidence though… Also, the spy software may notice the difference of connections and simply transfer no data via WIFI but only via the cellular modem. But I'm taking security too far, ain't I? ;) –  e-sushi Jul 24 '13 at 18:43
1  
@CallumWilson Since you noted you plan to go after the spysuite service provider, please don't forget to check "Terms & Conditions - Refund Policy - Legal Info" — sect. "5. Legality" as I'm not sure if that has any legal impact in your jurisdiction. I'm not a lawyer. As much as I know about forensics, as much knowledge am I missing in the legal field… I'm merely giving you a heads-up on what I found after I stumbled over their site. In my country, I would have to legally pursue the former employee who actively compromised stuff. –  e-sushi Jul 25 '13 at 22:53
1  
AJHenderson - a slightly different idea would be jamming the cell and then doing the wifi monitoring. Please note it may be illegal in your jurisdiction. –  Deer Hunter Jul 28 '13 at 7:31
show 7 more comments

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.