New iOS text bug (aka text bomb) can crash your iPhone

A newly discovered bug is capable of crashing your Apple iPhone or iPad by simply receiving a text notification. The bug occurs when an iOS device user receives a text message or tries to read a tweet which is written using some Sindhi characters. 

This type of bug is known as a "text bomb", because a malicious individual can use it to prank, bully, cause Denial of Service (DoS), or even "troll" their targets by constantly forcing the receiver's app to crash. The original message sent had the Italian flag in it and it was using the hashtag: #CaptureTheFlag. 

It is being reported from different sources on social media that the text message other that your iPhone it also may crash your iPad, Apple Watch, and other Apple Gadgets.

The text bomb looks like any of the following group of Sindhi characters with any emoji in between: 

For obvious reasons I had to take a screenshot so not to be held responsible for propagating this. It was tested and it works. 

Text bombs aren’t something new. There have been numerous cases in the past few years where  random strings of text have caused mobile devices to behave in an unexpected way. However, this one is slightly different as it will crash the iPhone to crash if the phone received a message or notification in any social media chat applications. Unfortunately there is nothing much a user can do to avoid this other that wait to install the new update from Apple. The issue seems to be affecting  all Apple's mobile OS version from 13.3 onwards. 

Note: If you receive this type of message use alternative means, e.g. through your Mac laptop or Twitter app under Windows, to delete the received/posted message. This will allow your phone to be able to have access to the affected app without being forced to crash. If you phone hangs completely, you will need to keep pressing the power and volume up keys, until it reboots.

Ping an IP range from the command line interface (CLI)

If you ever wanted to do host discovery while no specific network scanning tools were available (e.g. nmap), or you wanted to avoid creating a script file (e.g. due to having no write permissions)? Here are a couple of useful commands depending on the OS of your choice:

Windows OS:
for /L %i IN (1,1,254) DO ping -n 1 -w 1 192.168.1.%i| FIND /i "Reply" >> IPs.txt

Note: command prompt has a limitation when asked to return the exact string using regex and returns the whole line. Here is an example of replacing find with findstr in order to use a regular expression (regex). 
findstr /r "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*"

The regular expression can still be useful in cases such as:
ipconfig | findstr /r "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*"


Linux OS:
for i in {1..254}; do (ping -c 1 -i 1 192.168.1.$i >/dev/null && echo "192.168.1.$i" &); done

Note: The above command will only list the discovered IP address, without any additional text.

Tip/Trick: Did you know you can use apr to achieve the same results but much faster. This seems to be reliable under Linux. The following command will list the discovered host on your network, including any additional information per IP (including the IPv6 address).
for ip in $(seq 1 254); do arp -n 192.168.1.$ip | grep on; done

The following command however, will list only the IP addresses without any additional text (also avoiding to specify the IP range twice)
for ip in $(seq 1 254); do arp -n 192.168.1.$ip | grep on | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' ; done

Awareness around COVID-19 SMS Phishing (Smishing)

This blog-post discusses an issue known for almost 20years, which is related to the online SMS platforms. Given the recent pandemic and the use of the GSM network for sending SMS notifications to the public, it in an opportunity to raise awareness regarding Smishing (SMS Phishing) attempts, targeting the public which is affected by COVID-19.

In Greece, the number 13033 is being used to send SMS confirmations to people who use this particular service, which is used for registering in advance their daily movements when it comes to get essential goods (such as, going to the supermarket, the pharmacy, etc.) before they exit their homes. Due to the COVID-19 pandemic, this process attempts to limit people’s unnecessary movement(s), in an attempt to minimise the risk of getting affected, or contaminating others in case the person is a carrier of the virus.

Given the importance of the pandemic and the necessity of this service, it is mandatory to mention that it is possible to spoof the SEND ID in order to send SMS updates to recipients pretending to be from the original 13033 service number. This action, have the potential to trick the recipients (general public) in clicking on malicious links, or by using Social Engineering (and potentially scare tactics) to ask recipients to pay a fine that has been imposed. 

"Given the current situation, it would be beneficial to everyone if the Ministry in Greece responsible for operating the 13033 service (and other Ministries around the globe that use similar services), could promote a campaign educating all recipients regarding the potential threat of Smishing"

More specifically, the public should be informed that they should under no circumstances visits any URLs received by the 13033 service and that the 13033 service will not send any messages requesting to pay any fines. The public need to be aware that in case they receive such messages, these should be ignored and deleted.  

The proof of concept for the alluded was tested and proven by @DimisMeu and we decided to publish this blog post in order to be able to raise the necessary awareness. 

Command line (CLI) check and monitor COVID-19 statistics

Use the following command to quickly check for COVID-19 (corona virus) statistics from the console (CLI), for the countries you want to monitor.

Command line:
clear && curl -s https://corona-stats.online/?minimal=true | grep "Rank\|(DE)\|(IT)\|(ES)\|(GR)\|(US)\|(AE)\|(GB)\|(CH)\|(AT)\|(NL)"

Modify the command as needed with any valid ISO 3166-1 Alpha-2 Country Codes. 

Thanks goes to @ekrysis for collecting the data sources and providing the means to query the information. See more at GitHub: https://github.com/sagarkarira/coronavirus-tracker-cli 

Some examples:
# Get data from worldometers api i.e source 2
curl https://corona-stats.online

Mac OS - Show the full path in the Finder title bar

A very useful feature that you might want to enable on Mac OS is to always have the full path of the working directory displayed in the Finder title bar. 

> Using the command line, run the following command to activate it:
defaults write com.apple.finder _FXShowPosixPathInTitle -bool true; killall Finder

> To deactivate the feature run the command:
defaults write com.apple.finder _FXShowPosixPathInTitle -bool false; killall Finder

NOTE: The above commands will terminate all of your open Finder windows. If you do not wish to have your Finder windows closed, you can run the commands without the
"; killall Finder" part. In that case, only new windows will have the full path until you close and reopen the ones that do not have it. 

How to "cheat" from reopening all of your Finder windows:

• Option A) On your Finder icon in your Dock, hold the ⌥ (alt/option) key and Right-Click, then Click Relaunch.
• Option B) Bring in-focus a Finder window. Hold the key Shift on the keyboard and click the  menu. The option Force Quit Finder will be available.  

Tip: You can Show/Hide the Path Bar at the bottom of the Finder windows at anytime from the menu. Bring in-focus a Finder window and to to View > Show Path Bar. This is useful if you need to instantly navigate up several folders. 

Bonus: Show/Hide the hidden files in Finder. 

1. Open the folder where you want to display the hidden files in Finder.
2. Hold down the keys Command, Shift and Period: cmd + shift + .
3. The hidden files and folders on your Mac will then appear partially transparent.