Discover and read the best of Twitter Threads about #malware

Cory Doctorow @pluralistic@mamot.fr Red Team Blues

@doctorow

Today's Twitter threads (a Twitter thread).

Inside: KPMG audits the nursing homes it advises on how to beat audits; and more!

Archived at: pluralistic.net/2023/05/09/din…

#Pluralistic

1/

Tomorrow (May 10), I'm in #Vancouver for a keynote at the #OSSummit:

events.linuxfoundation.org/open-source-su…

And a book event at #HeritageHall:

eventbrite.ca/e/red-team-blu…

On Thu (May 11), I'm in #Calgary for @WordfestTweets:

wordfest.com/2023/event/wor…

2/

KPMG audits the nursing homes it advises on how to beat audits: Too big to fail, too big to jail, and an existential risk to civilization.

https://twitter.com/doctorow/status/1655965100577284098

Read 29 tweets

Matthew

@embee_research

🚨Malware Tips 🚨 - Resolving API Hashes Using Conditional Breakpoints.

By adding breakpoints and log conditions to a function that resolves api hashes, it's possible to quickly resolve api hashes in bulk.

Thread
[1/11] 👇

#Malware #AgentTesla #Ghidra #Debugging

[1.1/11]
Link to original sample: bazaar.abuse.ch/sample/7512be2…

Link to Full Blog: embee-research.ghost.io/agenttesla-ful…

[2/11] You first need to locate a function that resolves api hashes.

An example can be seen here - A giveaway is the same function is repeatedly called with hash-like values. An extra telltale sign is that each return value is cast as code (code *).

Read 12 tweets

Krippenreiter

@krippenreiter

⚠️ A browser extension is always a double-edged sword.

In general, there isn't much to disagree with in what @panosmek has written in this fantastic thread, but here are few additional thoughts:

🧵👇 [1/13]

https://twitter.com/panosmek/status/1652383985450770439

[2/13] Browser extensions in and of themselves can easily be the source of #exploits.

So, rather than securing your #browser session, increasing your #privacy, or acting as a warning tool before signing transactions, it may turn out to be your worst enemy.

[3/13] — Attack Vectors —

🧐 There are merely two malicious concepts that will be exploited by #hackers to harm you while using #browser extensions:

🔸 Supply-Chain attack
🔸 Man-in-the-middle attack

Read 14 tweets

Cory Doctorow @pluralistic@mamot.fr Red Team Blues

@doctorow

Today's Twitter threads (a Twitter thread).

Inside: The seductive, science fictional power of spreadsheets; and more!

Archived at: pluralistic.net/2023/04/29/ged…

#Pluralistic

1/

Tomorrow (Apr 30) at 2PM, I'll be at the #SanFrancisco Public Library with my new book, *Red Team Blues*, hosted by @annaleen@wandering.shop:

sfpl.org/events/2023/04…

2/

The seductive, science fictional power of spreadsheets: Maybe the map IS the territory?

https://twitter.com/doctorow/status/1652363900103569409

Read 29 tweets

Matthew

@embee_research

🐀 AsyncRAT 🐀 - Defeating Obfuscation Using CyberChef

An overview of some advanced CyberChef tricks for decoding malware

[1/12] 🧵

#AsyncRAT #Decoding #CyberChef #Malware

[2/] First, some links if you wish to follow along.

The Malware File: bazaar.abuse.ch/sample/26c9f29…

Links to CyberChef Recipes:
github.com/embee-research…

[3] Decimal Values:

Some text is converted to decimal to hinder simple text based analysis.

To defeat:
- Subsection - This grabs encoded data without removing the rest of the script
- Regex - Grab the decimal and ignore the "chr" junk
- From Decimal - Decode the decimal

Read 12 tweets

7h3h4ckv157

@7h3h4ckv157

𝐌𝐚𝐥𝐰𝐚𝐫𝐞 𝐚𝐧𝐝 𝐑𝐞𝐯𝐞𝐫𝐬𝐞 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐂𝐨𝐧𝐭𝐞𝐧𝐭𝐬 📢

#infosec #Hacking #redteam
#malware #ReverseEngineering
#RE

Awesome Malware and Reverse Engineering
lnkd.in/dZFy_k6d

lnkd.in/dZh9hbpq

Awesome Reverse Engineering
lnkd.in/etvePWr

lnkd.in/dh25YEkn

lnkd.in/daEcJEJ9

lnkd.in/ds88s46R

Awesome Malware Analysis
lnkd.in/dh_tMmyY

lnkd.in/e3KJ7rC

lnkd.in/dbn94MUW

Malware API
malapi.io

lnkd.in/djqeN7RS

Malware Analysis and Reverse Engineering
lnkd.in/dXjFkZ7a

Retoolkit
lnkd.in/dwn8bRi3

Malware Bazar
bazaar.abuse.ch

Malware Analysis Journey
lnkd.in/d9B6UGQ8

Read 6 tweets

Matthew

@embee_research

Ursnif Loader (Javascript) - Manual Decoding Using Cyberchef

[1/13] 👇🧵

#Cyberchef #Decoding #Ursnif #Malware

[1.1] A quick summary/TLDR before we get started

- Remove comments (manually or using regex)
- Remove "split" strings (manually or using regex)
- Remove obfuscated numbers
- (optional) Rename Variables
- Apply beautifier and syntax highlight

[2] First, I downloaded the sample from Malware Bazaar and loaded it into a safe analysis VM.

You can find the same sample here
bazaar.abuse.ch/sample/2a72302…

Read 14 tweets

Matthew

@embee_research

Potential #DanaBot Loader - De-Obfuscation using CyberChef and Python.

Sample: bazaar.abuse.ch/sample/80aad66…

C2: 0/90 VT
Script: 5/59 VT

[1/5] 👇

#Regex #python #cyberchef #malware

[2/5] Note the initial script contains a large amount of junk comments to mask the "real" code.

These can be removed using #cyberchef and a short #regex.

Find and Replace
^(REM|').*\n

[3/5] There are some long junk numbers scattered throughout the code.

Personally, I decoded with Python and an eval inside of a safe VM.

Read 5 tweets

Security Onion

@securityonion

Today's quick #malware analysis with #SecurityOnion: FAKEBAT, REDLINE STEALER, and GOZI/ISFB/URSNIF pcap from 2023-02-03!

Thanks to @malware_traffic for sharing this pcap!

More screenshots:
blog.securityonion.net/2023/02/quick-…

#infosec
#infosecurity
#ThreatHunting
#IncidentResponse

@malware_traffic Let's review some of the data that #SecurityOnion generates from this traffic!

When you import the pcap using so-import-pcap, it will generate a hyperlink that will take you to the Overview dashboard:

@malware_traffic Here are the NIDS alerts:

Read 13 tweets

Interlock

@interlockweb3

🧠The term Artificial Intelligence is being used as a catch-all for a number of different disciplines but one particular use case may be more important than others: security.

🧐Here's how we use #AI to improve security

🧵👇

First of all, artificial intelligence just means the simulation of human thought by a computer. When you’re using a calculator, you’re already using a computer to “think for you” and do math.

Now you can use a computer to do things like pattern recognition. 🔳🔲🔳🔲🔳🔲

How? The short version is that if you give the computer a step-by-step explanation about how you look at something, you can run it over, and over, and over while correcting its mistakes along the way. 🔁

Read 14 tweets

Interlock

@interlockweb3

🎙️Web3 Security Q&A with our CEO Rick Deacon - @rickdeaconx

⚠️Part I: Common #Web3 Threats

(Part II: How Interlock solves this by using #AI - will be published tomorrow!)

🧵👇

Q: What are the top security problems for crypto and Web3 users right now?

A: "The most prevalent security problems are all focused on social engineering:

1⃣Phishing attacks where attackers try to steal personal information by disguising a malicious website as a legitimate one.

2⃣Malware infections which can steal personal information, funds or take control of a device.

3⃣Scams that take advantage of the hype around #cryptocurrency and Web3 technologies to trick users into sending money or personal information.

Read 18 tweets

Kevin Poireault

@kpoireault

🧵 While #ChatGPT is grabbing the headlines, pushing @GoogleAI (#LaMDA) and @Baidu_Inc to rush their plans to launch competitors, maybe it’s time to explore the security/privacy concerns generative AIs raise.

Here's a #thread on some of these, brought to you by @InfosecurityMag.

@GoogleAI @Baidu_Inc @InfosecurityMag First, @OpenAI’s #ChatGPT has already been used to develop #malware and other malicious tools, as @a_mascellino reported on January 9, 2023. #encryption #cybercrime cc @SShykevich @_CPResearch_
infosecurity-magazine.com/news/chatgpt-d…

@GoogleAI @Baidu_Inc @InfosecurityMag @OpenAI @a_mascellino @SShykevich @_CPResearch_ Here’s the original @_CPResearch_ report 👇

https://twitter.com/_CPResearch_/status/1611393636511502338?s=20&t=qVtcTkAVqGwLUlHuBVv6zA

Read 15 tweets

Matthew

@embee_research

Malware Analysis Tip - Use Process Hacker to watch for suspicious .NET assemblies in newly spawned processes.

Combined with DnSpy - it's possible to locate and extract malicious payloads without needing to manually de-obfuscate.

1/

#Malware #dnspy #analysis #RE

2/ For anyone wanting to try - The initial sample can be in the link below

Once executed (inside of a safe vm!) - You should see the installutil.exe detailed in the screenshots above.

(Make sure to use Dnspy-x86 for attaching to the process) 😄

bazaar.abuse.ch/sample/b24c75d…

3/ Sometimes you'll get lucky and the modules will be named much more suspiciously.

See below for an example of a suspected #redlinestealer loader. Which injected multiple modules into a renamed powershell.exe.

bazaar.abuse.ch/sample/7e09174…

Read 3 tweets

Matthew

@embee_research

(Possible) AsyncRat loader - Interesting regex to decode the obfuscated C2.

Script was found on host with an active #AsyncRat infection.

#malware #regex #decoding

[1/6] The team at @HuntressLabs are still observing IronPython executables used to load #malware.

In these cases - IronPython (ipyw.exe) file is typically renamed to SupportTool.exe or Ctfmon.exe

Since ipyw.exe is "legitimate", the VT detection rate is very low (0/72).

[2/6] The "update.py" is where the malicious action starts.

This is usually a simple python file containing an additional obfuscated script.

Below you can see this decoded via #CyberChef.

Read 7 tweets

Alvaro Chirou

@alvaro_chirou

17 herramientas GRATUITAS de #hacking #ciberseguridad #gratis:
Va hilo 🧵

1.Zeek: zeek.org : monitorea y analiza el tráfico de red en tiempo real, captura paquetes, registra eventos y genera alertas de actividad sospechosa. Ampliamente utilizado en la industria y en la investigación académica. #Zeek #seguridad #red

2.ClamAV: clamav.net :detectar y eliminar virus, malware y otras amenazas en archivos y mensajes de correo electrónico. Se utiliza a menudo en servidores de correo y sistemas de red para proteger contra amenazas de seguridad.#ClamAV #virus #seguridad #malware

Read 25 tweets

Matthew

@embee_research

Setting up an analysis VM for reverse engineering?

Here are a few good tools (with short demos) that I recommend after running the Mandiant/FLARE script, (which installs 99% of tooling for you) 🔥

TLDR:
Garbageman, SpeakEasy, BlobRunner, Dumpulator

#Malware #RE #Analysis

2/ This is the Flare script from Mandiant. Simply running this script will install the majority of tools that you would ever need.

As a beginner RE or malware analyst, you can work comfortably using only the tools included in this script.

github.com/mandiant/flare…

3/ Over time I've picked up some other tooling that isn't installed by default by Flare.

These are relatively lesser-known tools that I have found very useful.

Read 12 tweets

SentinelOne

@SentinelOne

🧵 Everyone’s chatting about 🤖#ChatGPT. Here are 11 things it can do for #malware analysts, #security researchers, and #reverse engineers. A thread >>👇 🧵
1/13

🙋🏻‍♀️ Learn how to use reverse engineering tools more effectively. Use #openAI chat bot to get rapid interactive help on your reversing tools.
2/13

👾 Teach yourself #assembly language. Ask #ChatGPT to convert high-level code into assembly. #arm #intel little endian big endian #nasm #masm. It knows them all.

3/13

Read 13 tweets

Thomas Roccia 🤘

@fr0gger_

📢I recently investigated a campaign targeting the cryptocurrency industry. I wrote a detailed report that includes TTP, IOC and more. Here is a thread about this attack! 🧵👇

@MsftSecIntel @MicrosoftAU #infosec #cryptocurrency #threatintelligence #apt

microsoft.com/en-us/security…

The attack started on Telegram to identify the targets, then they deployed a weaponized Excel document which finally delivered the final backdoor through multiple mechanisms. ☠☠️ #infosec #malware #backdoor

🧐To identify the targets, the threat actor sought out members of cryptocurrency investment groups on Telegram.

👀They created fake profiles using details from employees of the company OKX. #infosec #Cryptocurency

Read 14 tweets

Nithin 🦹‍♂️

@thebinarybot

Here's a list of 5 FREE Cybersecurity trainings.
🧵👇

.
.
.

#bugbounty #cybersecurity #infosec #hacking #tech #learninig #datasecurity #linux #ransomware #ethicalhacking #cybersecuritytraining #cybersecurityawareness #malware #informationsecurity #isecurity

1️⃣ NICCS Federal Virtual Training Environment (FedVTE)

Link: rb.gy/5uai1j

2️⃣ SANS Cyber Aces Free Cyber Security Training Course

Link: rb.gy/qg9on5

Read 7 tweets

Defencegreece-Media

@defencegreece_m

1/Αναλυση #υποκλοπες #Ελλαδα: Συνομιλησαμε το προηγουμενο διαστημα με εναν ειδικο στην κυβερνοασφαλεια ο οποιος δεχτηκε να απαντησει σε ερωτησεις μας σχετικα με #malware που προσβαλουν κινητες συσκευες μεταξυ των οποιων και το #Predator.

2/Στο παρων 🧵 θα προσπαθησουμε να ξεδιαλυνουμε καποια σημεια για το σκανδαλο των υποκλοπων. Η συνεντευξη εγινε με την μορφη ερωταπαντησεων πανω σε μεθοδους και εργαλεια που θα μπορουσε να χρησιμοποιησει καποιος για να ξετυλιξει την ακρη του νηματος.Τα στοιχεια του μας ζητηθηκε

3/να μην γινουν γνωστα όπως η ακριβης ιδιοτητητα του για ευνοητους λογους. Για την ευχερεια της παρουσιασης της συνεντευξης θα τον αναφερουμε με τα αρχικα ΖΖ
DG:Αν καποιος εχει λαβει καποιο λινκ (χωρις να το πατησει) μεσα απο malware μπορει με καποια μεθοδο να βρει τον ειβσολεα?

Read 27 tweets

SentinelOne

@SentinelOne

🧵Let's talk about #Telegram - here are ten useful cybersecurity groups and channels we watch:

A thread:

1. Cyber Security News (30k+ members)

Cyber Security News is a feed channel for links to breaking news stories across the internet, everything from #TechCrunch to #Portswigger. It’s a one-stop shop for cyber-related news with your morning coffee.

telegram.me/cyber_security…

2. Cyber Security Experts (23k+ members)
A great channel for exchanging #information about #cyber, #IT, and #security. Mainly used to get answers to questions and help other security experts to enhance their security maturity.

t.me/cybersecuritye…

Read 13 tweets

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