Questions tagged [system-compromise]

Dealing with a system compromise: your defenses failed, now what?

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How to know if I exposed my computer by clicking on a suspicious link? [duplicate]

I have recently received a message with a link on skype and very stupidly clicked to open it. The url was shortened, and after I clicked it became that deep web-like thing and it gave me a dead link ...
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How to fix deceptive site ahead warning on a wordpress site

I have an issue with my website, when visitors try to access it shows the deceptive site ahead warning I used google search console to try to fix it (as I successfully did it previously with some ...
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OS on external drive -- is it safe?

So I'm installing macOS to my external hard drive partition, so I can have a 100% clean environment where I can engage with cryptocurrencies. (Exchanges, stable coins, protocols, putting actual money ...
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Compromised machine. Should I create a partition or volume to install a clean OS?

My goal is to create a 100% clean environment where I can interact with cryptocurrencies. For that, I can partition my disk or I can create a volume. Which one should I prefer? Some context about the ...
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How can this Jim Browning YouTuber have access to so many scammers' computers/networks?

I'm frankly sick of these videos, and the only interesting part to me has nothing to do with the scam or the content of the video, but simply the fact that he is apparently somehow able to see exactly ...
6 votes
3 answers
770 views

Friend's Instagram account repeatedly hacked despite changing all information and enabling 2FA

My friends Instagram account has repeatedly been hacked. Someone is gaining access to her account, proceeding to change all the security information to lock her out. Then posts scam ads on her account....
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1 answer
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Ability of an infected UEFI bios to store data on computer

Suppose the UEFI BIOS is infected. The storage device is encrypted, there is no network access to the system, and RAM is encrypted. Is there any writable storage that an infected UEFI can write to ...
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What are possible attacks if am connecting to public WiFi using repeater, through Ethernet or /and if the router's firmware is hacked

What are possible attacks if am connecting to public WiFi using repeater, through Ethernet or /and if the router's firmware is hacked, supposing am running a Debian system ,blocking inbound ...
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Will secure boot prevent any non signed firmware from running?

Wonder if secure boot can protect my computer from usb drives with infected firmware after Debian os is booted ?
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How easy is it to hack a laptop using android phone assuming it's firmware is infected?

Wonder about if it is possible for an android device with infected firmware and fully controlled by hacker to compromise my computer remotely (assuming hacker has already locally flashed a different ...
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Hacked list of AD logins and passwords

An organization my friend works for was recently hacked, and the hackers published a file with over 100,000 names and passwords, including theirs. An IT person in the organization told me that the ...
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Why am I seeing this in /var/log?

I've noticed a lot of weird logs in /var/log on my server. For example: cd /var/log/DIST00000001ARGC00000005ARGV00000002ccARGV00000002-cARGV00000006nmap.cARGV00000002-oARGV00000006nmap.oDOTI00000000 ...
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Email server compromise?

My company sends around 1M emails per month through various providers (Sendgrid etc.). One of emails we send is a "sign up" email, which contains a link for a user to finish registering ...
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Is it called Drive-by Compromise if attacker provided his website for user to access?

If the website is legitimate and the attacker exploited that legitimate website, and the attacker gains access to a victim's system that visits the website, then it is a drive-by compromise. However, ...
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Spawning child processes from root using runuser command

I am working as an intern for an online coding platform startup (similar to LeetCode or HackerRank). The backend is written in Nodejs. Instead of running the code in a sandbox of some sort, the lead ...
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Database password encryption compromised

A company has a database with user's passwords encrypted. An attacker compromised the password encryption now it needs to be changed. In this situation does the company needs to change the encryption ...
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How can this "Jim Browning" YouTuber have access to all these scammers' PCs? [closed]

I've been watching these videos on YouTube about some British-sounding male (with millions of views) busting Indian scammers. It is never explained how exactly he is able to do this, with him ...
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How did SolarWinds get hacked? And was the Orion update put out without human approval? [closed]

Obviously there is massive information about the SolarWinds Orion hack itself of the malicious DLL injected into the update: https://www.fireeye.com/blog/threat-research/2020/12/evasive-attacker-...
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SolarWinds Orion SAML compromise mass cert update

SolarWinds Orion customers have suffered some network compromises according to news reports. One report says, right at the end of the article, that SAML2.0 signing certificates may have been ...
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MacOS's Finder (and Xcode) accessing iDevices while network was off

I am trying to figure out what is wrong with my Mac. Here are my devices: iPad (7th generation, MW752LL/A) with iOS 14.01 (18A393), iPad Air (MD788LL/A) with iOS 12.4.8 (16G201), iPhone 6 Plus (...
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How do you find an attacker if he immediately cleans after himself?

Having an Ubuntu server with current software, updated daily, every 5 days or so someone gains root access. I know that from log watch. I search the logs for his ip and it doesn't show up. He is ...
3 votes
4 answers
259 views

How do I minimize the number of passwords leaked when a PC gets compromized?

For customer support reasons, we need to store passwords to some of our customers' systems (with their explicit, written permission, of course), as well as, obviously, passwords to some of our own ...
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Strange Proxy Application Behavior on iOS 13.5.1

Background: My buddy is a freelance journalist working on a story on one of the bigger software companies (a household name, starts with an A). Anyway, he asked me to take a look at his iPad because ...
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How do maintainers calculate x number of accounts compromised by hack? [closed]

I am always curious by reports in the news of big network sites getting hacked and the report confidently stating a statistic such as "only 10,000 users were affected" or "Microsoft confirms 40,000 ...
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I've nuked it from orbit, now what?

Last night I was checking my router because I noticed some sluggishness with my connection. I opened a connections monitor and saw my computer was sending significant UDP traffic to an IP address on ...
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DDoS: calculating server threshold for requests

There's a question on infosec stack exchange here that is similar but not the same as what I want to know: Threshold for DDOS Attack I want to know how to calculate the amount of requests, and/or ...
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Compromise of a Public JS Library

I was listening to a podcast about cybersecurity, and I heard that a public JavaScript library was compromised by attackers who injected a credit card scraper into the library, and then every site ...
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Wordpress m4shell Hack [duplicate]

I could not find any similar error after searching the web and struggling with the problem for around two weeks. One of the Wordpress sites I'm managing keeps getting hacked. There has been no ...
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Help in understnading HIDS OSSEC traces

I realized my system Ubuntu and windows dual boot might have been compromised. So, I installed OSSEC HIDS to try to look for issues. When I ran dmesg, i found the following trace: ------------[ cut ...
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Logged in with a hacker's email address

I have an active account at ebay-kleinanzeigen.de (like Craigslist in the US). Today I got a valid email from them that my email address was changed. On my mac, I opened up my ebay-kleinanzeigen ...
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What authentication systems have been involved in data breaches?

Recently, a Federal Judge ordered Marriott to reveal the forensics report for its data breach. I know the Courts have sided with businesses in the past to keep the forensic details of breaches from ...
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What should I do next on my GPG key after my computer is seized by authority?

Unfortunately, although my keys are protected by password, I am afraid it is not strong enough. I assume I lost control of all my private keys now. I still have backup of my private keys, what I want ...
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Differences between compromised shared hosting and dedicated/virtual hosting

My webspace has been compromised as explained on this answered question. While looking for advice on other q&a it seems to me in the answers it is assumed the compromised system is a full ...
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Would encrypting a database protect against a compromised admin account?

I was discussing with someone ways to prevent data disclosure from a compromised admin account on a database server. The other person proposed encrypting the data at rest within the database. It ...
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Received ransom email containing my password. How did they get my password?

Finally, even I got the fabled ransomware emails we've all heard about so much. First, let's look at the facts before I get to my question: I use Mozilla Thunderbird as my email client. I was ...
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I am a political activist, its likely that my computer will be compromised in the future, how can I secure my data?

I have sensitive data to secure. My computer may likely be compromised physically in the future. How can I secure my date from various attacks like Evil Maid attacks and so forth. I have some basic ...
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How to verify a private key has not been compromised?

I have a machine with a process that signs code for users running 24/7 (encrypting the key is not possible), which will be protected as well as possible. Is there a way to set things up such that I ...
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What are the security implications if systemd is not restarted after it has been updated?

My understanding is that systemd is the parent process for all other processes running on Linux. If systemd has been updated on production devices such as servers and the service is not restarted, ...
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3 votes
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Decrypting possibly compromised Veracrypt hard drive

I have a Veracrypt encrypted hard drive, a system drive encryption with the operating system. The laptop is possibly compromised, which is why I can't decrypt it directly on the laptop. I don't know ...
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IBM warns to move data out of insecure encryption schemes, but where to? [duplicate]

I'm currently using GnuPG (RSA 4096), Encryption-based DLP, SSL, SSL-VPN, Password Manager and other apps considered insecure by the IBM research team, who favor Lattice encryption over the standard ...
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How was IronChat compromised?

How was IronChat compromised? https://hotforsecurity.bitdefender.com/blog/police-crack-encrypted-chat-service-ironchat-and-read-258000-messages-from-suspected-criminals-20530.html Dutch police have ...
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Are kernel mode drivers harder to compromise? [closed]

Of course the effects of a compromised kernel mode driver are more disastrous, but are they harder to compromise in the first place?
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Best Source of Security Configuration Guidance

Over the years I have used a number of different sources of security configuration guidance for a spectrum of systems including for example: https://www.cisecurity.org/cis-benchmarks/ https://www....
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Is it a good idea to have a new laptop just to generate 2FA keys?

I am very concerned about people putting keyloggers or trojans on my computer. That can happen because I use my computers for many things. Work. Playing games. Watching movies. Accessing many ...
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Server protection measures from authorities

I am on a project which is illegal in my nation but is not illegal anywhere in the world. In order not to get a 100yr sentence I should be prepared for seizures and forensics. I am running a server ...
2 votes
1 answer
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Port Knock logs suggest machine has been compromised?

On my CentOS machine, all my ports are filtered with the Iptables rule: DROP all -- * * 0.0.0.0/0 0.0.0.0/0 So from the Internet, every port timeouts. The only way to ...
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SSH Outbound. Tracking down the process

I was pulled up by my ISP in work for having a machine making dozens of outbound SSH connections. I tracked down the machine and took it off the network. Problem is there are several other machines ...
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Firefox directs me to strange chinese error page, is my security compromised?

Today I was working on a project on my localhost ( I'm a web developer ), when I noticed Firefox is showing a message that means I need to login to my ISP before I can start browsing ( The ...
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ROP Attack :Force the program to manipulate an instruction as a gadget

I'm doing basic exploitation test on a simple program with fiew lines of code. I intend to exploit a buffer overflow vulnerability to perform a ROP attack. To gather the available gadgets I use ...
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SUID exploit and patch

I am working on a SUID root binary "app" that runs a system("ls -la /dir") command. I managed to exploit it by writing a malicious replacement ls that starts a shell, and changed my user's $PATH such ...
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