Furthermore, law enforcement and security still seize and find 2G SIM cards (globally speaking) associated with criminal activity - drug dealing, SIMboxing, trafficking, etc. - so any observations to assist examination may help improve outcomes, assist generate "quality in work" but without expending large quantities of capital.
Equally, with 3G and 4G SIM cards the examiner can still SELECT and ReadBinary etc. re: GSM Access. Also, it is helpful to let examiners see basic script commands and responses as the basic commands can still be issued under [USIM Application CLA (0x00)]:
To make the following a little more interesting than merely showing a screen image of USIM Application returning the SIM Card's IMSI, does the mobile network IMSI match the network to which the IMSI was last latched?
Select 6F7E (e.g. location area)
Select 6F73 (packet switched location area)
Observations, at first instance: the LOCI and PSLOCI screens reveal that the subscriber's account has been latched to the T-Mobile network; not EE or Orange network. Who would provide feedback to the investigating office on what that means? Both of these screens show "updated" for location and routing area, yet the P-TMSI Signature Value has been unchanged FFFFFF. What significance, if any, would that import into interpreting the data?
The key point of using commands and getting responses can assist an examiner refine searches made to (U)SIM and the (U)ICC and also respond to "time-is-of-the-essence" requests in cases of device seizure at the point a trafficker is stopped and searched. Combining precise information searches can help examiner's do this.
Moreover, with enhanced scripting and script variables we can do so much more and a matter that will be considered in another blog discussion post/s soon regarding examination, evidence and validation:
If (GoodStatus = True)
If (GoodStatus = True)
Set $recNum = 1
While ($recNum <= $totalRecords)
The tool USIM Commander is a SIM evaluation and programming tool available from Quantaq Ltd and can be found here: http://www.quantaq.com/products/simtools/
Hope you find this helpful.
Contaminating Evidence ONE - http://trewmte.blogspot.co.uk/2017/04/contaminating-evidence-one.html
Contaminating Evidence TWO - http://trewmte.blogspot.co.uk/2017/04/contaminating-evidence-two.html
Contaminating Evidence THREE - http://trewmte.blogspot.co.uk/2017/04/contaminating-evidence-three.html
Contaminating Evidence FOUR - http://trewmte.blogspot.co.uk/2017/05/contaminating-evidence-four.html
Contaminating Evidence FIVE - http://trewmte.blogspot.co.uk/2017/05/contaminating-evidence-five.html