3) Malware Removal & Mobile OS Flashcards
Malware Removal Procedures: Pneumonic
I Question Dad’s Reasons Some Early Evenings
Identify Quarantine Disable Remediate Scan Enable Educate
Malware Removal: Step 1
Identify & research malware symptoms
Odd errors, app failures, slow performance, slow boot
Malware Removal: Step 2
Quarantine infected systems
Disconnect from network, keep it self-contained
Isolate all removable media
Don’t transfer files or try to backup
Malware Removal: Step 3
Disable system restore (Windows)
Restore points automatically created before software installation.
Malware may infect your restore points.
Disable system protection.
Delete all restore points.
Malware Removal: Step 4
Remediate infected systems
Update the anti-malware software
Scan & use removal techniques
(safe mode, preinstallation environment)
Install anti-malware on another computer & put on removable drive. Do not plug back into an uninfected computer.
You may be able to get a stand-alone removal app for the specific malware infection.
Malware Removal: Step 5
Schedule scans & run updates
Should be built into the anti-malware/antivirus software
If not auto updates, use task scheduler
Check for OS updates
Malware Removal: Step 6
Enable system restore & create restore point (Windows)
Only turn back on once computer is cleaned.
Create a restore point.
Malware Removal: Step 7
Educate the end user One-on-one personal training Posters/signs Message board posting Login message Intranet page
Mobile OS Troubleshoot: Dim display
Adjust brightness level
If that doesn’t work, backlight issue - Replace
Mobile OS Troubleshoot: Intermittent wireless
Move closer to access point
Or try a different access point
Mobile OS Troubleshoot: No wireless connectivity
Check/enable WiFi
Check security key configuration
Hard reset can restart wireless subsystem
Mobile OS Troubleshoot: No bluetooth connectivity
Check/enable Bluetooth
Check/Pair Bluetooth component
Hard reset to restart Bluetooth subsystem
Clear Bluetooth cache
Mobile OS Troubleshoot: Cannot broadcast to external monitor
Check app requirements
All devices must be on same wireless network
Signal strength is important too
Between Phone-TV
Between TV-Internet
Mobile OS Troubleshoot: Touchscreen non-responsive
iOS - Restart
or hold down power and Home/Volume for 10 sec
Android:
Remove battery, put back in, power on
Hold down power/volume until restart
Mobile OS Troubleshoot: Apps not loading
Restart the phone Stop the app & restart Update the app Reinstall the app Contact the developer
Mobile OS Troubleshoot: Unable to decrypt email
Protect your email (encrypted channels)
Each user has a private key (can’t decrypt without)
Corporate setting: Use MDM to install individual private keys on each mobile device
Mobile OS Troubleshoot: Extremely short battery life
Bad reception; always searching for signal
Airplane mode on the ground
Disable unnecessary features
(802.11, Bluetooth, GPS)
Check application battery usage
Could be aging battery
Mobile OS Troubleshoot: Overheating
Phone will automatically shut down to avoid damage
Can create heat:
Charging/discharging the battery, CPU usage, display light
Check app CPU usage
Avoid direct sunlight
Mobile OS Troubleshoot: Frozen system
No screen/button response, nothing works
Try a soft reset
May require a hard reset
Constantly freezing? Factory reset
Mobile OS Troubleshoot: No sound from speakers
Check volume settings for device/app
Try headphones
If with an application, try restarting/reinstalling
Sound starts/stops: Dueling apps, keep app in foreground
No sound at all: try software update or factory reset
Mobile OS Troubleshoot: Inaccurate touch screen response
Close some apps
Low memory can cause resource contention
Restart the device (soft/hard)
May require a hardware fix (digitizer)
Mobile OS Troubleshoot: System lockout
Too many incorrect unlock attempts
iOS: 10 failed attempts; erases everything
Can disable, but delays increase with failed attempts
Android: locks or wipes after failed attempts
Need Google login to unlock
Mobile OS Troubleshoot: App log errors
Most log info is hidden - Activate developer tools
May take a bit of research to decipher logs
iOS: Xcode
Android: Logcat
Mobile OS Troubleshoot: Signal drop/weak signal
Location is everything
Make sure you’re connected to a trusted network
If you absolutely need public WiFi, use a VPN, but don’t trust public networks
Tether with your own device
Run a speed test
Mobile OS Troubleshoot: Power drain
Heavy app use
Increased network activity
High resource utilization
DoS
Check app before install (use an app scanner)
Force stop running apps
Run anti-malware or perform factory reset
Mobile OS Troubleshoot: Slow data speeds
Unusual network activity
Unintended WiFi connections
Run a WiFi analyzer
Are you on a trusted network?
Run speed test
Cell tower analyzer - check how much data is being sent
Mobile OS Troubleshoot: Unintended Bluetooth pairing
Don’t connect to an unknown device
Remove the Bluetooth device
Disable Bluetooth radio
Run anti-malware scan
Mobile OS Troubleshoot: Leaked personal data
Unauthorized account access
Leaked personal files/data
Determine cause of data breach
App scan, anti-malware scan
Check online data sources (cloud)
Change passwords
Factory reset/clean install
Mobile OS Troubleshoot: Unauthorized location tracking
Run an anti-malware scan
Check apps with an offline app scanner
Factory reset
Restore from known-good backup
Mobile OS Troubleshoot: Unauthorized camera/microphone activation
Third party app captures intimate info
Turn off app access
Run anti-malware scan
Confirm loaded apps are legit
Factory reset
