Jonathan Cheung @elephacking
Red Team, Pentest, I’m interested in all the things in OffSec field! github.com/elephacking Joined July 2018-
Tweets158
-
Followers28
-
Following358
-
Likes89
EDR Internals for macOS and Linux : outflank.nl/blog/2024/06/0…
How to fix the Crowdstrike thing: 1. Boot Windows into safe mode 2. Go to C:\Windows\System32\drivers\CrowdStrike 3. Delete C-00000291*.sys 4. Repeat for every host in your enterprise network including remote workers 5. If you're using BitLocker jump off a bridge
Crowdstrike Analysis: It was a NULL pointer from the memory unsafe C++ language. Since I am a professional C++ programmer, let me decode this stack trace dump for you.
OST cannot be stopped. Here is a technique we tested internally 9 months ago: blocking EDR telemetry by leveraging the Windows Filtering Platform. Considered it so evil that we didn't publish it that time. It was pointless, now here it is by @netero_1010: github.com/netero1010/EDR…
My Top 2 Google Dorks 🐘 PHP ext:php inurl:? site:example[.]com 🤫 Juicy Extensions ext:log | ext:txt | ext:conf | ext:cnf | ext:ini | ext:env | ext:sh | ext:bak | ext:backup | ext:swp | ext:old | ext:~ | ext:git | ext:svn | ext:htpasswd | ext:htaccess site:example[.]com
Fancy a macOS 0day local privilege escalation for GOG Galaxy? Although reported almost a year ago, there is still no patch. Full details for the vulnerability: securityintelligence.com/x-force/exploi…
Do this on your AD Domain Controller:
# Define the list of executable file paths to log
$ExecutablePaths = @(
"C:\Windows\System32\ntdsutil.exe",
"C:\Windows\System32\dsa.msc",
"C:\Windows\System32\dsac.exe",
"C:\Windows\System32\gpmc.msc",
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe",
"C:\Windows\System32\mstsc.exe",
"C:\Windows\System32\wbem\wmiprvse.exe",
"C:\Windows\System32\eventvwr.msc",
"C:\Windows\System32\secpol.msc",
"C:\Windows\System32\dsquery.exe",
"C:\Windows\System32\dsadd.exe",
"C:\Windows\System32\dsrm.exe"
)
# Enable Object Access auditing
$AuditPolicy = Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\Audit"
$AuditPolicy.ObjectAccess = 1
Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\Audit" -Name ObjectAccess -Value 1
# Loop through each executable path and configure audit settings
foreach ($Path in $ExecutablePaths) {
$AuditRule = New-Object System.Security.AccessControl.FileSystemAuditRule("Everyone", "ExecuteFile", "Success,Failure")
$AuditRulePath = New-Object System.Security.AccessControl.FileSystemAuditRule("Everyone", "ReadAttributes", "Success,Failure")
$Acl = Get-Acl -Path $Path
$Acl.AddAuditRule($AuditRule)
$Acl.AddAuditRule($AuditRulePath)
Set-Acl -Path $Path -AclObject $Acl
}
# Verify the audit settings
Get-AuditLogConfiguration | Format-Table -Property IsObjectAccessAuditEnabled, IsAuditEnabled
--- Part 2: watch this log carefully ---
# Define the list of executable file paths
$ExecutablePaths = @(
"C:\Windows\System32\ntdsutil.exe",
"C:\Windows\System32\dsa.msc",
"C:\Windows\System32\dsac.exe",
"C:\Windows\System32\gpmc.msc",
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe",
"C:\Windows\System32\mstsc.exe",
"C:\Windows\System32\wbem\wmiprvse.exe",
"C:\Windows\System32\eventvwr.msc",
"C:\Windows\System32\secpol.msc",
"C:\Windows\System32\dsquery.exe",
"C:\Windows\System32\dsadd.exe",
"C:\Windows\System32\dsrm.exe"
)
# Define the log name and event IDs for Object Access auditing
$LogName = "Security"
$EventIDs = @(4663, 4670, 5136)
# Define the filter XML to filter events related to executable paths
$FilterXML = @"
OpenAI 的大神 Andrej Karpathy 前几天在他的 YouTube 频道讲了一堂课,系统的介绍了大语言模型,内容深入浅出,非常赞,抽空将它翻译成了双语,由于内容较长,我将分批上传,以下是第一部分精校后的双语视频,字幕文稿如下: Intro: Large Language Model (LLM) talk 大家好。最近,我进行了一场关于大语言模型的 30 分钟入门讲座。遗憾的是,这次讲座没有被录制下来,但许多人在讲座后找到我,他们告诉我非常喜欢那次讲座。因此,我决定重新录制并上传到 YouTube,那么,让我们开始吧,为大家带来“忙碌人士的大语言模型入门”系列,主讲人 Scott。好的,那我们开始吧。 LLM Inference 首先,什么是大语言模型 (Large Language Model) 呢?其实,一个大语言模型就是由两个文件组成的。在这个假设的目录中会有两个文件。 以 Llama 2 70B 模型为例,这是一个由 Meta AI 发布的大语言模型。这是 Llama 系列语言模型的第二代,也是该系列中参数最多的模型,达到了 700 亿。LAMA2 系列包括了多个不同规模的模型,70 亿,130 亿,340 亿,700 亿是最大的一个。 现在很多人喜欢这个模型,因为它可能是目前公开权重最强大的模型。Meta 发布了这款模型的权重、架构和相关论文,所以任何人都可以很轻松地使用这个模型。这与其他一些你可能熟悉的语言模型不同,例如,如果你正在使用 ChatGPT 或类似的东西,其架构并未公开,是 OpenAI 的产权,你只能通过网页界面使用,但你实际上没有访问那个模型的权限。 在这种情况下,Llama 2 70B 模型实际上就是你电脑上的两个文件:一个是存储参数的文件,另一个是运行这些参数的代码。这些参数是神经网络(即语言模型)的权重或参数。我们稍后会详细解释。因为这是一个拥有 700 亿参数的模型,每个参数占用两个字节,因此参数文件的大小为 140 GB,之所以是两个字节,是因为这是 float 16 类型的数据。 除了这些参数,还有一大堆神经网络的参数。你还需要一些能运行神经网络的代码,这些代码被包含在我们所说的运行文件中。这个运行文件可以是 C 语言或 Python,或任何其他编程语言编写的。它可以用任何语言编写,但 C 语言是一种非常简单的语言,只是举个例子。只需大约 500 行 C 语言代码,无需任何其他依赖,就能构建起神经网络架构,并且主要依靠一些参数来运行模型。所以只需要这两个文件。 你只需带上这两个文件和你的 MacBook,就拥有了一个完整的工具包。你不需要连接互联网或其他任何设备。你可以拿着这两个文件,编译你的 C 语言代码。你将得到一个可针对参数运行并与语言模型交互的二进制文件。 比如,你可以让它写一首关于 Scale AI 公司的诗,语言模型就会开始生成文本。在这种情况下,它会按照指示为你创作一首关于 Scale AI 的诗。之所以选用 Scale AI 作为例子,你会在整个演讲中看到,是因为我最初在 Scale AI 举办的活动上介绍过这个话题,所以演讲中会多次提到它,以便内容更具体。这就是我们如何运行模型的方式。只需要两个文件和一台 MacBook。 我在这里稍微有点作弊,因为这并不是在运行一个有 700 亿参数的模型,而是在运行一个有 70 亿参数的模型。一个有 700 亿参数的模型运行速度大约会慢 10 倍。但我想给你们展示一下文本生成的过程,让你们了解它是什么样子。所以运行模型并不需要很多东西。这是一个非常小的程序包,但是当我们需要获取那些参数时,计算的复杂性就真正显现出来了。 那么,这些参数从何而来,我们如何获得它们?因为无论 run.c 文件中的内容是什么,神经网络的架构和前向传播都是算法上明确且公开的。
New YouTube video: 1hr general-audience introduction to Large Language Models youtube.com/watch?v=zjkBMF… Based on a 30min talk I gave recently; It tries to be non-technical intro, covers mental models for LLM inference, training, finetuning, the emerging LLM OS and LLM Security.
Microsoft launched the best course on Generative AI. The free 12 lesson course is available on Github and will teach you everything you need to know to start building Generative AI applications. Each lesson includes: - a short video introduction to the topic - a written lesson located in the README - a Jupyter Notebook with code examples (for project-based lessons) - a challenge or assignment to apply your learning - links to extra resources to continue your learning
看到一个 GitHub 仓库,真是叹为观止。作者通过拍摄 ROM 芯片的显微照片(图一),将里面固件的二进制代码(图二)还原了出来。github.com/travisgoodspee…
Ghidralligator is a tool by @AirbusCyber to emulate Ghidra p-code for fuzzing with AFL++ Github Repo: github.com/airbus-cyber/g… #ghidra #fuzzing #infosec
CVE! CVE! CVE! 🤣🤣
The world just became a little bit safer 🥰 thanks to all the hackers and researchers reporting vulnerabilities nvd.nist.gov/vuln/detail/CV…
I’ve just publicly released SQLRecon v3.3. This release includes many features that were used privately by the @xforcered Adversary Services team on real-world red team operations. Please share, enjoy, and use responsibility. Hmu if you have any questions! github.com/xforcered/SQLR…
I really love the Windows Kernel Rootkit Techniques training! It was such an intensive training runs in 4 days! Thank you @codemachineinc #BlackHat2023
今天用了一个非常有趣的命令行工具:TheFuck github.com/nvbn/thefuck 听这个名字就不一般,用途也和名称一样。 我们经常会输错一些命令,比如 typo 等等。 它可以自动修正你输入的上一个命令的错误,然后让命令成功的运行。具体可以看下动图,感受一下。我觉得是一个非常好用,值得收藏的小工具。 Stars 多的很惊人: 77.9K
Today I learned: By using an HDR <video>, a website can display a very bright white, like ~7 times brighter than #FFFFFF, on an iPhone/iPad. This can be used to e.g. show a bright QR code for easy scanning despite user’s low brightness settings. notes.dt.in.th/HDRQRCode
Search Engines for PenTesters #Hacked #CyberAttack #infosec #cybersecurity #community #security #Pentesting
github.com/tenderlove/ini… 這個喝多了 XDDD
Johnny @Luckyrocky2028
251 Followers 7K Following Stay Hungry, Stay Foolish. Only those who are self-disciplined can attain true freedom.|No Politics.
Jennifer Clayton @JenniferCl67343
0 Followers 170 Following Recruiting webshell engineers to penetrate websites, with a monthly salary of up to $100,000. If interested, please contact https://t.co/yzd0O5Nxx6
sender @senderend
121 Followers 95 Following Pentester, Red Teamer @Specterops | OSCP https://t.co/NxqedjZKrn https://t.co/2Srd2LBpUo https://t.co/ocu6vX5cF5
SeptemberErisman @SeptemberE43559
55 Followers 2K Following
postexer @postexer
0 Followers 340 Following
sender @semichrist0
0 Followers 58 Following
seo-google @seogoogle4
68 Followers 5K Following 变态杀人狂带着笑容,刀尖在地上留下了一道长痕,在屠戮场里悠闲地走着看着面带惊恐的猎物四下奔逃,杀人之前甚至要行一个绅士礼,鲜血落在地上是一幅幅艺术画。
werdhaihai @werdhaihai
603 Followers 482 Following Principal Red Team Operator @armadinsecurity https://t.co/pztdK7udq3
Leonardo Quitto Arell... @LquittoA
40 Followers 2K Following
hangzzz @hangzzz12
4 Followers 189 Following
Abo Salah ☠ @abosalahps
527 Followers 5K Following security researcher with limited brain memory,check my likes.
melo @nullvivi
1 Followers 1K Following
0xvance @vansteki
25 Followers 1K Following
Drupad Soni @Drupad8140
243 Followers 2K Following
Ethical Hacker @offethhacker
2K Followers 6K Following
Jason Smithz @smithz_jason
8 Followers 5K Following
SANKARA Ahmed Landry @ahmedlandrysan1
107 Followers 521 Following Don't be talented, be an artist! Change doesn't take time, preparation to change does.
𝔻𝕒𝕣𝕜𝔻�... @pwndarkdroid
558 Followers 587 Following Passionate Android Security Enthusiastic | https://t.co/NGspP1vEG2 Cyber Security & Incident Response #cybersecurity #infosec #pentester | Views Are My Own !!!
Chaminda Ranasinghe�... @chamindarr
486 Followers 5K Following #Servers #Networking #Windows #IT #Linux #Apple #Traveling #Microsoft #Etc
Burhanuddin Netterwal... @burhannetter
29 Followers 93 Following Information Security | Automobiles | Cricket
Shantanu Khandelwal @shantanukhande
1K Followers 477 Following Cyber Security Researcher. #RedTeam Own Opinions
小鱼·币币机·AI... @cr0ath
7K Followers 1K Following AI中转站(含企业服务) 👉 https://t.co/SDSvpzMBli YouTube 小鱼币币机 https://t.co/PgNWsObq9P 日本語食べない人📍 Japan 🇯🇵 区块链研究员 Blockchain Researcher
Oege de Moor @oegerikus
7K Followers 601 Following CEO and founder of XBOW. Previously: Founder of GitHub Next, founder of GitHub Copilot, CEO and founder of Semmle (GitHub Advanced Security), prof at Oxford.
Joe Vest @joevest
8K Followers 885 Following Red Teamer丨Author of Red Team Development and Operations https://t.co/LTiTgnFKJq 丨Don't let perfect be the enemy of good
Alexandru "sickness" ... @_sickn3ss_
6K Followers 463 Following Him / He. Security Researcher & Architect at OffSec. Advanced Windows Exploitation (AWE) author. @[email protected]
Burhanuddin Netterwal... @burhannetter
29 Followers 93 Following Information Security | Automobiles | Cricket
Dhanesh Dodia @Dhanesh_Dodia
118 Followers 635 Following Founder, CEO @threatwatch360 🇮🇳 Security Researcher ⚔️ | Hunting vulnerabilities, financial scams, fraud, phishing and darkweb dataleaks | Views are my own
Chris Thompson @retBandit
7K Followers 923 Following CEO @ RemoteThreat & Founder of Offensive AI Con | Former Head of X-Force Adversary Services | Black Hat Review Board | inveni et usurpa
Dirk-jan @_dirkjan
30K Followers 208 Following Hacker at @OutsiderSec. Researches AD and Azure (AD) security. Likes to play around with Python and write tools that make work easier.
Pieter Ceelen @ptrpieter
2K Followers 147 Following Red teamer @ Outflank, product owner Cobalt Strike/Outflank Security Tooling
Matt Hand @matterpreter
10K Followers 201 Following Building @originhq | Author, Evading EDR @nostarch
Duane Michael @subat0mik
1K Followers 528 Following Security Researcher, Teacher, Leader @SpecterOps
Chris Thompson @_Mayyhem
3K Followers 498 Following Senior Security Researcher @SpecterOps https://t.co/Sz5fRYkX6u
ACE Responder @ACEResponder
18K Followers 227 Following Practice threat hunting & detection engineering in a real SIEM with real attacks. Join us and become the best.
Vangelis tix Stykas @evstykas
3K Followers 392 Following Father of two sons and ARIS fan. Named NOT A UNICORN!🦄 IDOR as a service. @_ifigeneia husband Never ethical , mostly legal...
Shawn @anthemtotheego
2K Followers 422 Following CTO & Co-Founder @RemoteThreat | Ex Head of Capability R&D Adversary Sim X-Force | Offensive AI | Malware | Work In Progress | https://t.co/eNspx7jLvm
werdhaihai @werdhaihai
603 Followers 482 Following Principal Red Team Operator @armadinsecurity https://t.co/pztdK7udq3
Alh4zr3d @Alh4zr3d
24K Followers 274 Following Legal Criminal | Twitch cult leader | InfosecPrep founder | Lovecraft scholar | Soros mercenary | Spiritual cargo shorts wearer | Cthulhu fhtagn
Kuba Gretzky @mrgretzky
17K Followers 772 Following Creator of Evilginx - Reverse Proxy Phishing Framework for Red Teams: https://t.co/hPg644CTnM
ksonSOUCHOU🍕 @ksononair
865K Followers 784 Following けいそんです。趣味でインターネット活動してます。 https://t.co/AjJHM3ibSi https://t.co/pIX1VImYCF Contact➡📧ksonmng@gmail
Yarden Shafir @yarden_shafir
26K Followers 329 Following A circus artist with a visual studio license
straightblast @straight_blast
1K Followers 54 Following
🥝🏳️🌈 Be... @gentilkiwi
62K Followers 295 Following A kiwi coding mimikatz & kekeo github: https://t.co/eS3LVgU6i0 Head of security services @banquedefrance Tweets are my own and not the views of my employer
Abo Salah ☠ @abosalahps
527 Followers 5K Following security researcher with limited brain memory,check my likes.
Rhino Security Labs @RhinoSecurity
7K Followers 2K Following Rhino Security Labs is a top penetration testing and security assessment firm with a focus on cloud (AWS, GCP, Azure), network, and web application pentesting.
0xvance @vansteki
25 Followers 1K Following
Andrew Thompson @ImposeCost
41K Followers 2K Following SVP of Adversary Operations @GreyNoiseIO. Former @USMC, @Mandiant, and @Google. There's no finish line in security.
Paul Seekamp @nullenc0de
18K Followers 636 Following I spend a significant amount of time reading security stuff. Co-Founder/Partner @CoastlineCyber https://t.co/ZQT5L8q2RO
⠝⠁⠃⠑⠑⠇ �... @rogue_kdc
3K Followers 298 Following Self-proclaimed Security Researcher. I live on 0days. All tweets are ████████!
Vitali Kremez @VK_Intel
43K Followers 86 Following Ethical Hacker | Reverse Engineer | CEO @AdvIntel | Malware Course Author "Zero2Hero" / "Zero2Automated" | Former .gov Cybercrime | Threat Seeker Award
Baptiste Robert @fs0c131y
252K Followers 5K Following CEO @PredictaLabOff | French Security Researcher, Ethical Hacking, OSINT
Roberto Rodriguez �... @Cyb3rWard0g
26K Followers 680 Following AI Security Researcher @nvidia | Prev: @Microsoft @awscloud | Founder of the @OTR_Community
Florian Roth ⚡️ @cyb3rops
223K Followers 3K Following Head of Research @nextronsystems #DFIR #YARA #Sigma | detection engineer | creator of @thor_scanner, Aurora, Sigma, LOKI, YARA-Forge | always busy ⌚️🐇 | vi/vim
Andy Robbins @_wald0
36K Followers 2K Following Co-founder of SpecterOps. Co-creator of BloodHound. https://t.co/rub1i3Fs9g
Dave Kennedy @HackingDave
232K Followers 6K Following Founder @Binary_Defense @TrustedSec Co-Owner https://t.co/NUvgPUifL0. @WeHackHealth Pod. God + Family/Hacker/CSO/USMC/Intel/Fitness. Make the world a better place.
SpecterOps @SpecterOps
41K Followers 403 Following Creators of BloodHound | Experts in Adversary Tradecraft | Leaders in Identity Attack Path Management
BlueKeepBot @BlueKeepTracker
899 Followers 58 Following Hi! I'm a bot created by @pry0cc from NaviSec Delta! (https://t.co/Uapae7nLIY), I track new BlueKeep/CVE-2019-0708 POC's and repo's associated with them.



































