A botnet is a collection of computers that are under the control of a person or group, usually facilitated by malware. These computers are often used to take part in DDoS attacks and spamming.

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How Do Botnets Leverage LAMP stacks and Web Servers?

I understand MySQL databases, PHP, HTML forms, etc. And I also understand that basic botnets rely on client bots that communicate with a central command-and-control server. However, if someone were ...
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Command and Control Infrastructure

This is an academic question, I Googled a lot but couldn't find suitable answers for the question. What are the di fferent Command & Control infrastructures (Botnets) & what are the ...
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How To Stop A Mobile Verification Attack

I am thinking of using mobile phone number verification for the sign up step in my web application but how do I prevent a hacker or a malicious user from sending mobile verification requests to an ...
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Which is better: detecting spam at receiver or source?

Background I researched a detection of spam sent out using bots. After studying different techniques used by bots to deliver spam, I have no generalised solution to detect spamming at the source ...
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Spam mails originating from botnet

Background I am working on spam detection at the receiver side,i.e where all mails are delivered,i.e at the mailserver side. Spammers are capable of sending spam mails through Bots,Open relays and ...
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Why don't the majority of today's malware use strong cryptography?

While reading another story of botnet takedown, my wondering has reached its apogee: Why don't malware authors use cryptography (encryption + signing) provided by good libraries when their creations ...
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Hops encountered More for spam Mails than Legitimate Mails

Background I am working with email headers for spam detection. Each E-Mail header contains many "Received:" headers fields. Each "Received:" header is added by an intermediate Smtp/Mail server in the ...
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DGA (Domain Generation Algorithm) - malwares

Some malwares use DGA (Domain Generation Algorithm) to randomly generate domains in order for the zombies to be able to communicate in a resilient manner with the C&C. As far as I know, there is ...
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How to reduce Adwords click fraud (botnet clicking ads)? [closed]

I hope this is the right place to ask (here is a similar question but the answers aren't specific for AdWords). My Google AdWords campaign has been under attack for the past 3 days. Bots from ...
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87 views

Nginx: How to block IP by hostname regex

I'm running a small wordpress site with nginx + php5-fpm. I have noticed that I get a lot of botnet attacks from IPs with hostnames like: 52-182.static.spheral.ru 208-135.static.spheral.ru 118-239....
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How do botnets not get caught when using Gmail accounts for spamming? [closed]

Botnets are Spamming through web-mail services like gmail.com,hotmail.com,etc. by compromising email-accounts I read a post from this forum about how online accounts are compromised. Following are ...
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Detecting Bots Who are sending Spam Mails via Webmail

I am working on spam Detection done by botnets. Some Information Recently,I came through a techique to detect the spammer in my network which is based on the anamolous amount of MX queries,outbound ...
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How do Bots Spam Where Outgoing SMTP is blocked

I have read,that bots in an internal network talk directly to External Mail servers instead of going through the Internal Mailserver to deliver spam. Query If it's true, than how do Bots spam do so ...
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Firewalled bots in UDP p2p botnets?

One thing that I don't understand about peer to peer botnets, is how a bot stays connected to the network considering the protocol used is UDP. Since the UDP is connectionless, and the bot is behind ...
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Detecting Spamming activities of Botnets

Remarks Hello Everyone,thanks for being a nice platform for expressing Everyone's Doubts/Views. Problem Statement I want to detect spamming activity of botnets Background Information about ...
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5k views

Zeus botnet source code

I am doing my project on botnets and wanted to understand the source code of the Zeus botnet. Where is the right place to get started with some analysis of zeus botnet source code? I need a good ...
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69 views

How to successfully report DoS attack coming from a big ISP?

A few weeks ago I reported a small botnet which is coming from the network of a big Internet provider. They asked me for more details which I provided. But the attack is going for weeks already and ...
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Looking for botnet IP address feeds to protect against DDoS

I would like to get a live feed of botnet IP addresses delivered from a service and block them under certain conditions. Preferably community based/open source but open to looking at worthy commercial ...
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3answers
84 views

Reporting Credit Card Thieves

Someone is using a client's commerce site to check the validity of lots of credit cards. After dropping IP addresses based on usage whoever is behind it throttled their requests down to 1 request ...
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349 views

How is IRC so secure/untraceable that hackers and pirates use it to communicate?

Whats is special about IRC that hackers use it to do online meetings ignoring every other way like messengers or social media? It seems to be very secure that it gets used to send commands to victims ...
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How hackers implemented DDoS attack with 602 Gbps?

Everybody's heard about DDoS attack with 602Gbps Bandwidth that crashed BBC site, But is really Botnets and hacked servers can implements an attack in this scale ?
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How do browser injections work?

I've heard many times that malware like Zeus, SpyEye and Citadel are able to do browser injections to steal credit card data. How do they do it? how do browser "injections" work? How are they able to ...
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267 views

How does Zeus (and other malware) inject code into other processes

Recently, I've been studying how malware works, most recently the infamously known Zeus bot, and I've noticed one thing that I don't seem to understand: The malware is said to be able to hook APIs in ...
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Bot detecting by considering request inter-arrival time

If there are some chances to detect a bot by considering the users page viewing time, is it possible to measure this time? When a user request for a page (page request), browser request for several ...
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How do bots communicate in the zeus botnet?

I read on http://www.abuse.ch/?p=3499 that: ZeuS is now using an “IP list” which contains the IP addresses of other drones participating in the P2P botnet. An initial list of IP addresses is hardcoded ...
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What is the role of IP spoofing in DDoS attacks?

I've read that IP spoofing is often used in denial of service attacks, and I've also just recently read about ingress filtering, which attempts to use blacklisting to filter out spoofed IP addresses ...
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Detecting botnets that use HTTP instead of IRC

I know most bots use either IRC or HTTP to communicate with the C&C, and http unlike IRC can't be blocked. So if a botnet is using HTTP, how can this be prevented? Just theoretical!
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Is it possible to be a hacker without being a criminal?

I am interested in information security, and I want to be a "hacker." I want to write hacking tools, make viruses, and other stuff... For me, programming botnets are a lot of fun, but how can ...
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How can I create a research botnet within VMware?

For educational purposes I am attempting to create a botnet within VMware making use of 3 or 4 machines (So I can attack a 5th virtual machine using this botnet), but the issue I'm facing is I can't ...
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REST Services: Limiting the concurrency of a login endpoint

Scenario: A botnet is recruited to try to authenticate against a website or service with each bot trying infrequently using a common password and a list of 'real' email addresses, avoiding the ...
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How do botnets communicate without being caught?

This is something i have pondered about for a while now, but never really thought to ask. How is it that botnets can communicate with a controller of some sort to co-ordinate DDoS attacks and other ...
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Why is the victim a server instead of a client?

I just finished creating my own remote administration tool "a server to multiple client one" using System.Net.Socket, - "Watch Dogs fan :P" then I try to search on google how they make or design ...
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Attack using weird characters followed by some javascript in a URL?

I'm seeing a very weird attack this morning from a pile of VPS instances spread out across the US. The URLs look like this: /js/bundles/,!0):this.element.propAttr( /js/bundles/&this.buttons....
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Creating botnet C&C server. What architecture should I use? IRC? HTTP?

I am doing a project related to botnets and I have to create a lightweight command and control server. But I am stuck: should I use IRC or a HTTP-based C&C? Even I am not getting any in-depth ...
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running botnet for analysis

I a very curious to understand botnets practically. I want to run a p2p botnet (storm or waledac) for analysis and learning. I have mainly two issues: Where can i get access to binaries of either ...
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How can I block bots that consistently hit the same URLs?

I am getting slammed hard by bots, and I am not sure how to stop them without blocking my legitimate traffic. I created some iptables rules that say, if X connections in X seconds, block, but that ...
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how we know whether our computers are part of a botnet? [closed]

When we visit websites, unknowingly our computers can be a victims of a botnet. There should be a way to identify whether we are victims or not. What is the way to identify it and how to recover from ...
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206 views

Possible virus hogging bandwidth [duplicate]

My computer might have a virus infection. I have used Norton Internet Security and Power Eraser to scan the computer but it still did not work. The traffic on my PC looks like this I used resource ...
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How Fast Flux technique works exactly?

I was reading about botnets and C&C servers and saw this term. I've read this Wikipedia article but I couldn't really understand what and how this is working. I think its some kind of proxy re-...
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395 views

Will gmail close my well intentioned botnet account? [closed]

I'm part of a company that has at least 1000 PC's distributed in different buildings over a radius of 25 miles. I've been asked to make a program to survey technical information on each PC. Since ...
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Should a server be considered compromised simply because a port was open?

Earlier today I received a notification of a security incident at Mandrill. At first I was concerned, but then after I dove into the details I became confused as to why they considered this noteworthy ...
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How to detect the so-called “undetectable” Gameover Zeus?

The media are currently (and have been) creating a huge ruckus surrounding the supposedly "undetectable" Gameover Zeus malware. The Daily Mail The Mirror The Independant PC World The Telegraph ......
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Why do researcher need to control all C&C servers of a botnet?

Why do researcher need to control all C&C servers of a botnet? Wouldn't it be easier to spread a deinstall command to all reachable PCs to cripple the botnet? This could be done over and over ...
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How do CC servers communicate to botnet bots in a local network?

A more general question How do bots communicate in the Zeus botnet? doesn't really address my question. I'm trying to understand how a bot can communicate with command and control (CC) machine. On a ...
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Can a botnet be used to effectively break encryption keys?

Can a botnet amass and coordinate enough computing power to break encryption keys that are typically considered to be secure (through brute force)? If this is the case, do we need to make our ...
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Can/do botnets brute force “high value” users of services like Gmail?

On an intranet a login is generally disabled after a very small number of failed logins. But a public email service like Gmail can't do the same, otherwise pranksters would just be continuously ...
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Botnet callback patterns

I am trying to understand the network behavior of bots. Are there any identifiable characteristics of callback requests from the bot to the C&C server which differentiates it from normal traffic? ...
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Publicly available Botnet Traffic dataset

Is there any publicly data set on botnet traffic for machine learning purposes. i.e traffic set for both bad and good bots
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Limitations of botnets [closed]

My question is very closely related to this question but I didn't find my answer there. Specifically, I'm interested in whether the C2 server can modify aspects/properties of the malware and, if so, ...
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distinguish between bots and legitimate clients [closed]

If an attack (DoS & DDoS) involves thousands of bots, how can the server distinguish them from legitimate clients?