gnremy

Neo23x0

log4j RCE Exploitation Detection

You can use these commands and rules to search for exploitation attempts against log4j RCE vulnerability CVE-2021-44228

Grep / Zgrep

This command searches for exploitation attempts in uncompressed files in folder /var/log and all sub folders

sudo egrep -I -i -r '\$(\{|%7B)jndi:(ldap[s]?|rmi|dns|nis|iiop|corba|nds|http):/[^\n]+' /var/log

MHaggis

#! /bin/bash
# Adopted from the great DetectionLab
# This will install Splunk + BOTSv3 dataset

install_prerequisites() {
  echo "[$(date +%H:%M:%S)]: Downloading DetectionLab..."
  # Clone DetectionLab for Splunk Apps
  git clone https://github.com/clong/DetectionLab.git /opt/DetectionLab
}

MHaggis

#! /bin/bash
# Adopted from the great DetectionLab
# This will install Splunk + BOTSv2 Attack only dataset

install_prerequisites() {
  echo "[$(date +%H:%M:%S)]: Downloading DetectionLab..."
  # Clone DetectionLab for Splunk Apps
  git clone https://github.com/clong/DetectionLab.git /opt/DetectionLab
}

Neo23x0

Base64 Patterns - Learning Aid

Base64 Code	Mnemonic Aid	Decoded*	Description
JAB	🗣 Jabber	$.	Variable declaration (UTF-16), e.g. JABlAG4AdgA for $env:
TVq	📺 Television	MZ	MZ header
SUVY	🚙 SUV	IEX	PowerShell Invoke Expression
SQBFAF	🐣 Squab favorite	I.E.	PowerShell Invoke Expression (UTF-16)
SQBuAH	🐣 Squab uahhh	I.n.	PowerShell Invoke string (UTF-16) e.g. Invoke-Mimikatz
PAA	💪 "Pah!"	<.	Often used by Emotet (UTF-16)

SwitHak

Advisory (URGENT/11)

UPDATE (2019-10-02 1241 UTC)

General

Armis released new information about the vulnerabilities scope. The vulnerabilities impact more RTOS than expected.

IP Stacks backstory

• Some of the vulnerabilities discovered by Armis doesn't resides in VxWorks RTOS but in one part of it, the IP stack. This IP stack named IPNET stack comes from Interpeak AB, a company acquired by Wind River the editor of VxWorks RTOS, the 20th March 2006.
• Before been acquired by Wind River, the Interpeak AB company sold IP stacks to several customers of them. Interpeak AB sold 2 major IP stacks named IPNET & IPLITE, IPLITE is a light version of IPNET.

mackwage

:: Windows 10 Hardening Script
:: This is based mostly on my own personal research and testing. My objective is to secure/harden Windows 10 as much as possible while not impacting usability at all. (Think being able to run on this computer's of family members so secure them but not increase the chances of them having to call you to troubleshoot something related to it later on). References for virtually all settings can be found at the bottom. Just before the references section, you will always find several security settings commented out as they could lead to compatibility issues in common consumer setups but they're worth considering. 
:: Obligatory 'views are my own'. :) 
:: Thank you @jaredhaight for the Win Firewall config recommendations!
:: Thank you @ricardojba for the DLL Safe Order Search reg key! 
:: Thank you @jessicaknotts for the help on testing Exploit Guard configs and checking privacy settings!
:: Best script I've found for Debloating Windows 10: https://github.com/Sycnex/Windows10Debloater
:

jessfraz

# Description: Boxstarter Script
# Author: Jess Frazelle <jess@linux.com>
# Last Updated: 2017-09-11
#
# Install boxstarter:
# 	. { iwr -useb http://boxstarter.org/bootstrapper.ps1 } | iex; get-boxstarter -Force
#
# You might need to set: Set-ExecutionPolicy RemoteSigned
#
# Run this boxstarter by calling the following from an **elevated** command-prompt:

jacobludriks

Function WSUSUpdate {
	$Criteria = "IsInstalled=0 and Type='Software'"
	$Searcher = New-Object -ComObject Microsoft.Update.Searcher
	try {
		$SearchResult = $Searcher.Search($Criteria).Updates
		if ($SearchResult.Count -eq 0) {
			Write-Output "There are no applicable updates."
			exit
		} 
		else {