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Ask Ubuntu

Questions tagged [hacking]

Questions about defence or recovery from malicious hacking. We do not support hacking, so questions about performing such hacks are not allowed here.

84 questions
12
votes
3 answers

Is it dangerous to install hacking tools on my private linux machine?

I use my Ubuntu for private and business purposes. Can I also install tools on my computer that are actually there to perform penetration tests? Or is it harmless?
Yannick
  • 121
10
votes
2 answers

Is it secure that Linux have default users?

Someone tried to hack my root user. It was interesting to me to find all users in my system. I don't remember I create any of them. Can hacker use any of other default users to enter the system (with default Linux system settings)? I can't login…
Egor
  • 211
8
votes
1 answer

How to check whether someone viewed/copied a video?

Is there any way to check if someone (a hacker who had physical access to my machine) has accessed or copied a file (a video) on my system? I really need to know.
eljimi12
  • 81
6
votes
1 answer

Ubuntu encrypted hard drive - possible to crack?

I'm using Ubuntu 18.04 on my laptop. If someone would steal my laptop, would it be possible for them to access my data stored on the laptop? Could any of them access my data, not just random people but people who really know what they are…
wimdewild
  • 77
6
votes
5 answers

How can I reverse my wifi from monitor mode to normal mode?

In a course named ethical Hacking for beginners , I learned that wifi has some modes in which we can switch between but I don't know that what was the normal mode and how to switch on it I used following commands :- ifconfig wlo1 down iwconfig wlo1…
Ritanshu Singh
  • 63
5
votes
3 answers

Can anyone with physical access to my computer access my files?

I wonder what will happen if my computer got stolen. Can a hacker gain access to the files on my computer? I have Ubuntu 14.04 and have not installed any security programs - should I do something to protect myself against this?
kenneth
  • 677
5
votes
1 answer

need to check if my ubuntu 14.10 has been hacked

I have a Ubuntu 14.10 machine and I would like to check if my security is OK. I doubt that some one accessed my machine from internet and remotely controlled it. so what are the suitable tools I need to use to see if that really had happen and what…
Fat Mind
  • 2,485
5
votes
2 answers

Strange new rules added to my iptables config... Was my server hacked?

Today, I listed my iptables for a routine check -- and discovered two strange UFW rules that I don't remember setting up myself, referring to two specific IP addresses that I can't identify: -A ufw-before-input -d 224.0.0.251/32 -p udp -m udp…
killer_rabbit
  • 91
3
votes
0 answers

Is my Ubuntu Desktop under attack?

I am currently facing random freeze of my Ubuntu(16.04) desktop and screen fills up with the garbage pixels. I even cannot start command line using Ctrl-Shift-F1. Every time I have to manually do the hard reboot. After this happened few times I…
Xinus
  • 93
3
votes
3 answers

Was my SSH server compromised? If so, how, and what steps should I take?

I recently enabled ssh access to my machine to work on a group project with my classmates. I read the guide for setting up ssh on ubuntu and tried to follow good security practices. I disabled password authentication, so the only way to get in was…
user1340033
  • 63
3
votes
1 answer

Ubuntu server hacked. Recovering

I was cyber-attacked by someone from China and they managed to install Yam (crypto mining) on my Ubuntu 14.04 server. I managed to close their ssh access through the public IP. and I have remedied the damage they did. Except for two things that have…
Sam
  • 71
3
votes
1 answer

Can hackers inject anything to the server outside /var/www/html

We got hack because of a bad security on our server. The hacker got access of the database probably from a php file holding database credentials in the html folder. The /var/www/html folder had root privileges and 777 permissions. Could the hacker…
Cayenne
  • 45
3
votes
1 answer

How can I find the origin of a process and stop it permanently?

I have an Ubuntu system running an apache server. I have found a process cache.sh which I think might be a crypto-mining process and which is running all the time on my server consuming up to 98% CPU. This is causing other stuff to stop working like…
Deepak
  • 131
2
votes
0 answers

Wine: is my system secure to use again?

I installed wine latest version ,on my 16.04 .then I installed an untrusted exe which could have been a virus as it might have caused the registry error on my windows 10 earlier today So I uninstalled the program from wine and then purged wine it's…
user725143
  • 21
2
votes
2 answers

How to send the DHCP server a different hostname?(connecting to wifi with a fake computer name)

I want to connect to a WiFi network without disclosing my original Hostname(Computer Name) to the network. i.e, I want to connect to WiFi networks with a different (fake) Hostname of my choice without altering my Computer Name. Thank you.
user441517
1
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