Questions tagged [antivirus]

Antivirus or anti-virus software is used to prevent, detect, and remove malware, including but not limited to computer viruses, computer worm, trojan horses, spyware and adware.

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68 views

How dangerous can a file be with no detected malware?

Let's say there is file which successfully passed all scans by all antivirus software there is on VirusTotal. Does it mean that it can't be dangerous. If no, what kind of dangers we can expect?
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Bypassing Windows Defender VBA custum code

I've recently wrote a simple keylogger using classic dll-injection technique. I wanted to simulate a real phishing attack where user opens office document with macros and by enabling them he downloads ...
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3answers
180 views

Why is a fully-patched OS less important than AV?

How to explain to traditional people why they should upgrade their old Windows XP device? <- The interesting point made in the highest upvoted answer to this Q is that a fully patched OS is largely ...
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3answers
149 views

If we integrate CDR in our email solution, do we really need Sandbox as well?

In the case of social engineering attack vector is an email sent with a malicious attachment like XSL file, I am not really understanding where we will need Sandbox solution if we can just use CDR (...
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1answer
66 views

Wannacry testing in lab - Not getting SMB scan attempts

So I booted up two windows 7 64bit sp1 versions in virtualbox and shared their network and the operating systems are vulnerable to the SMB exploit that the wannacry ransomware is using. The Issue is ...
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1answer
549 views

Antivirus warns about processes trying to access my webcam

For the last two weeks I am constantly getting notifications from my antivirus about attempts of using my webcam. I have always chosen "Block access", often after checking "remember for this ...
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1answer
1k views

Bitdefender showing lot of Getting Suspicious Connection Blocked from Chrome extension Toby

I'm using GetToby Chrome extension to manage my tabs and save them for later. Lately, I've been getting lots of notifications from BitDefender about blocked suspicious attempt: chrome.exe attempted ...
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1answer
6k views

Is rooting an Android phone to install an anti-virus firewall worth it?

Some Android anti-virus offer a firewall like Avast or Comodo anti-virus but you need to have a root access to use them. However rooting an Adroid phone is often presented as a security risk. So: ...
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3answers
7k views

How does a crypter for bypassing antivirus detection work?

I am talking about crypters used to encrypt files like viruses and keyloggers for the sole purpose of bypassing antivirus detection. How do they work?
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1answer
108 views

How can Runtime-Crypters stay FUD

A Runtime Crypter always works with the same principle: It decrypts its payload, starts up a process in suspended state, inserts the payload and resumes the suspended process under false flag. All ...
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1answer
121 views

What is “rule-based” analysis in malware detection?

I've read a few articles that describe the heuristic detection used by AVs as being either "weight-based" or "rule-based". The weight-based aspect seems to make sense, but I don't understand what "...
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1answer
82 views

What are the best practices for anti-virus / anti-malware when using containers?

One of the SOC 2 controls is apparently around ensuring antivirus/anti-spam/anti-malware is running on production servers. I've been googling to see if there are any recommendation/best practices for ...
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1answer
258 views

Virustotal detecting threats in Suricata rule set

Virustotal scans are detecting threats from the Suricata default rule pack located https://rules.emergingthreats.net/open/suricata-4.0/ Is this a false positive? https://www.virustotal.com/#/file/...
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1answer
2k views

Computer worms, propagation and exploiting vulnerabilities

I am doing research on computer worms. I have been through several sites and a few caught my attention. I have learned that worms propagate through email, there are types such as XSS worm and most of ...
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1answer
125 views

Would my USB interface be infected if I attached and immediately detached an infected USB device?

Two days ago, someone gave me their pen drive to copy some songs from. As soon as I inserted the drive into my laptop's USB interface, Windows Defender immediately warned me that the drive was ...
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1answer
217 views

Can a virus that's in a file stream infect a computer?

I have a java web application that accepts base64 image strings from users. These strings are first converted to a byte stream after which the stream is scanned for viruses. After that the file is ...
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2answers
90 views

Should Anti Virus and Anti Malware layer be the first layer in web application stack or can it seat behind services?

Can you have Anti Virus and Anti Malware layer sitting deep with the microservice layer and have the malicious file flow through all the services ? Argument being the file is in memory and not getting ...
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4k views

Should antivirus HTTPS scanning be left on? Is it secure?

Some antivirus software MitMs, or through other methods, HTTPS connections in order to scan for malware, for example, Avast, and maybe other vendors too. Is the method they (let's say Avast as an ...
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1answer
157 views

How does malware evade initial discovery?

I've been reading a lot about polymorphic and metamorphic malware and how they evade signature-based detection once they have been discovered. These techniques seem to be utilized to evade recurrent ...
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21 views

Kaspersky detection locally 3 years old file, clean on virus total. Compromised? [duplicate]

I just got a warning on a file locally: Weird, as I have this program for like 2 o 3 years, Just before got cleaned, I upload to virus total, totally clean on cloud. https://www.virustotal.com/gui/...
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Defense Evasion - Unhooking Windows API

Since most of EDR vendor hook userland APIs, Is Unhooking Windows API or DLL Unhooking is the best way to bypass EDR Protection?
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1answer
77 views

Can Avast check my WI-FI password for strength?

I've been greeted by this popup this morning: Can Avast actually check my WI-FI password for strength? Or is it just "marketing scare" so that I upgrade to the paid version instead of using the free ...
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2answers
73 views

Python Antivirus comparing hashes [closed]

I'm writing an antivirus in python mostly to learn and for research purposes, I do understand it would be more efficient to do this in something like C and eventually I will port this over. So far I ...
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0answers
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How can you stay safe from spyware used by governments? [closed]

It is a fact that antivirus software can't detect all the spyware/viruses/malware that exist. And when they get detected, new ones are created. An example is the pegasus spyware for ios created by ...
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FYP ideas in Applications of Machine Learning in Cyber Security domain [closed]

I am a Computer Science Engineering undergraduate aspiring to pursue a career in the field of cyber security. I have some experience in web application security, memory and network forensics fields. I ...
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1answer
114 views

“Harmless” script which downloads malicious script

What if I code a program without malicious code which would pass in every antivirus scan and after the virus scan and user giving special rights to it, it downloads and executes the real virus? Since ...
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10answers
16k views

Replacing Windows 7 security updates with anti-virus?

Microsoft has announced Windows 7 will no longer be receiving updates after January 14, 2020: Here. I hate windows 10's forced updates and telemetry so I have always stuck with Windows 7, but it may ...
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2answers
2k views

eset smart security root certificate injection

I dont know a lot about this subject but - I am trying out ESET Smart Security version 9 which includes the nod32 product (antimalware/virus) and I received an error regarding the addition of a new ...
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1answer
137 views

How long is a typical malware signature?

I read in Peter Szor's Art of Computer Virus Research and Defense that, in the past, a 16-byte malware signature was sufficient to 16-bit detect malware, but that longer signatures are necessary for ...
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107 views

ClamAV Bytecode run timed out

I have the following output by ClamAV: Starting a daily scan of /root directory. Amount of data to be scanned is 205M. Starting a daily scan of /var/www directory. Amount of data to be scanned is ...
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1answer
108 views

How do i scan my AWS S3 buckets for malicious content/objects?

I am setting up AWS SFTP which uses s3 to store files. I am setting up sftp to exchange files with third party organisations. When i receive files i want to ensure no malicious content is received. ...
170
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10answers
27k views

Help! My home PC has been infected by a virus! What do I do now?

This is an attempt to ask a canonical question as discussed in this old meta post. The goal is to create something helpful that can be used as a duplicate when non experts ask about virus infections. ...
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8answers
19k views

Are there technical differences which make Linux less vulnerable to virus than Windows?

What makes Linux so different than Windows in terms of anti-virus needs? My question is not if I should get an anti-virus for my Linux. I perfectly understand why an AV is important. I would like ...
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2answers
247 views

How do I configure Symantec AV to permit pentesting tools without compromising my organization's network and my host computer?

When performing penetration testing for work, I often have to turn off Symantec Endpoint Protection in order to use certain payloads with Burp Suite and I recently had to do this for something as ...
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1answer
139 views

Norton Symantec Flagging my python script as Trojan.Bayrob9

I have symantec endpoint protection on my computer. I have the python script: import subprocess import os from ftplib import FTP os.chdir("public_html2") data=subprocess.check_output(["git", "diff","-...
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6answers
4k views

How is a worm different from a virus?

In spite of various online articles, I'm a bit unclear on the distinction between a "worm" and a "virus". Two related questions-- Is there a useful and clear distinction here or no? If so, what is ...
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0answers
294 views

How unwise is it to exclude WSL from Windows Defender?

Windows Defender often takes up a significant amount of CPU time due to I/O operations in WSL. For example, if I'm working on web development and using tools like npm or yarn, downloading packages ...
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1answer
344 views

What are some of the benign use cases of injecting bytes into another process and creating remote thread?

Lets say, you are developing an AV, and marked any type of injecting into another process (for example openning it and writing to it) and creating remote thread malicious. If so, what will be some of ...
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1answer
3k views

How to (temporarily) disable McAfee Endpoint Security on an enterprise workstation? [closed]

I need to temporarily disable McAfee Endpoint Security on an enterprise workstation after having obtained local administrative privileges. The McAfee Endpoint Security settings are protected by a ...
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1answer
122 views

Antivirus settings for developers and build machines?

I work in a company that has strict antivirus policy. Each computer must have an up-to date antivirus with all the bells and whistles turned on. But as a developers, this is giving us problems. ...
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68 views

Unknown process attempted to execute code

This morning I booted up my computer and not long afterward, got a notification from ByteFence (unsubscribed) that an unknown process attempted to execute a command that was deemed unwanted. ByteFence ...
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0answers
38 views

Test antivirus with virus/malware (No EICAR) [duplicate]

I am currently testing a new AI/Machine Learning antivirus solution. I installed it on a laptop and i manage through the dashboard on a different laptop. I am now testing how quickly it picks up stuff ...
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1answer
399 views

Difference between system uptime and last boot time in windows

As it shows in attached pictures, there is a "Difference between system uptime and last boot time" in my windows, it becomes an issue because AV, SIEM or every monitoring system shows a different time ...
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1answer
125 views

Platform as a Service and Anti Virus

We currently use a PaaS solution for our web application and db for a Ruby on Rails environment and PostgreSQL. In an on-premise solution, we had servers that we managed ourselves and had antivirus ...
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2answers
141 views

Can heuristic analysis detect keylogging?

Antivirus software detects threats by heuristic analysis like it analyzes the commands as they are performed, monitoring for common viral activities such as replication, file overwrites, and attempts ...
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0answers
124 views

Can developers stop their software from being flagged as malicious by AV products?

This may not be the correct community for this question, I apologize if that's the case. Scenario: A software development company has created a collection of small desktop applications. They have ...
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1answer
84 views

Virus from a printer kiosk?

I encountered a puzzling situation the other day when I plugged in a USB flash drive. Windows defender displayed an alert saying that a threat had been quarantined, specifically the Jenxcus VBS virus. ...
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1answer
53 views

Does the term “malware signature” always refer to a pattern of bytes? [duplicate]

I know that traditionally a malware signature is a pattern of bytes in a program. While reading Joxean Koret and Elias Bachaalany's "Antivirus Hacker's Handbook" I saw that the authors categorized the ...
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1answer
733 views

Should I get an antivirus for Linux Desktop

On a non-international forum I was reading a discussion about using an Antivirus on Linux Desktops. There are two opinions: 1. Anti-Virus is best-practise regardless of the OS used 2. Anti-Virus on ...
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29 views

How to remove a very stealthy virus? [duplicate]

I have a virus on my laptop preventing me from installing antivirus, or updating windows or even opening task manager. i tried running a virus scanner from a portable scanners, the virus disappears ...