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Nick Carr Profile picture
@ItsReallyNick
Aug 19, 2019 • 4 tweets • 6 min read • Read on X
#GuardrailsOfTheGalaxy
A lightweight domain check in this malicious spreadsheet references the following protected cells:

A101 = ms
A102 = build
A103 = exe
A104 = C:\Users\Public\ptedcod.xml

A100 = MSBuild payload

Shellcode calls back to RFC1918
http://10.200.23.122/dcb3
XLS upload fired on my #GuardrailsOfTheGalaxy VT hunting rules (23/58): virustotal.com/gui/file/23d13…
Note the ⏱️ guardrail
I agree with @buffaloverflow's previous comments that these are very basic implementations of #T1480 Guardrails (that expose your targets).
@buffaloverflow @MITREattack Let me connect the dots:
• @JohnLaTwC shared a sample "leav_blackboard_training.xlsm" in June 2018
• Document metadata aligns in both (Company=United States Army 😉) with different authors
• Syntax, builder (@infosecn1nja), and MSBuild payload overlaps
@buffaloverflow @MITREattack @JohnLaTwC @infosecn1nja @AndrewChiles Whoever created this phishing XLS was mapped to an HP Color Laser printer on the DoD Network.

See picture for how to find this within the OOXML file structure. 🖨️🔍

A fun little Open Office XML (OOXML) #opsec mistake in today's Spreadsheet (2ef213b794154a1099c0819ffd67309f)!🕵️‍♂️

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More from @ItsReallyNick

Nick Carr Profile picture
May 2, 2023
I understand there’s renewed interest in operational timelines re:SolarWinds supply chain compromise attackers

Was proud to publish this one within a week of staying up overnight & discovering how the attackers were persisting with backdoored applications.

Many other methods… twitter.com/i/web/status/1… Image
The value of our (+@cglyer) real-time attacker technique collaboration with absolute beasts in the industry @doughsec 😶‍🌫️, @penninajx + @srunnels 💻 cannot be overstated bringing together puzzle pieces for the RE wizards on each side
From the new @WIRED article: wired.com/story/the-unto…
———
While Mandia conferred with the government, Charles Carmakal, the CTO of Mandiant Consulting, contacted some old friends. Many of the hackers’ tactics were unfamiliar, and he wanted to see whether two former Mandiant… twitter.com/i/web/status/1…
Read 5 tweets
Nick Carr Profile picture
Mar 23, 2022
We've been tracking DEV-0537 since 2021 (overlaps: Lapsus$, UNC3661). Here's a comprehensive 🆕 BLOG 📰 covering observed TTPs: microsoft.com/security/blog/…

#MSTIC and Defender threat intel collab
➕#DART 👻 incident response team experience from the trenches [1/3]
The blog highlights varied initial access vectors and a slew of [inconsistent?] end goals: data theft, extortion, chaos...

One way to interpret "this actor's TTPs and infrastructure are constantly changing" is that they are loosely-organized (see: ) [2/3]
DEV-0537 / Lapsus$ shows that 𝘢𝘵𝘵𝘢𝘤𝘬𝘦𝘳𝘴 can be creative opportunists and still be successful.
Luckily, the same goes for 𝘥𝘦𝘧𝘦𝘯𝘥𝘦𝘳𝘴.
Use this opportunity to strengthen your security controls to protect far beyond this threat actor [3/3] microsoft.com/security/blog/…
Read 4 tweets
Nick Carr Profile picture
Dec 14, 2020
So you want to talk about the massive software supply chain intrusion & the most carefully-planned, complex espionage I’ve ever helped uncover?

Start here: fireeye.com/blog/threat-re… 🤩

But then what?? Let’s talk about some post-compromise techniques...
Please read the above blog to appreciate multiple backdoors used, careful & unique tradecraft used on-premise...

We just published more details on what we’ve been finding post-compromise: blogs.microsoft.com/on-the-issues/…
ADFS key material compromise, SAML shenanigans, OAuth keys added...
Within the technical companion blog (msrc-blog.microsoft.com/2020/12/13/cus…) we provide some late stage killchain activity observed many places.

I want to highlight the additional detections pushed to cover these techniques in @MSAzureSentinel (but anyone can use on the UAL for #DFIR) ...
Read 9 tweets
Nick Carr Profile picture
Sep 10, 2020
Added #STRONTIUM election-related credential harvesting campaign "detection" to #AzureSentinel: github.com/Azure/Azure-Se…

Yes - it's hardcoded for netblocks released in the #MSTIC report (microsoft.com/security/blog/…)
This is just extra coverage on top of existing cred harvesting logic
That said, the logic posted there finds some high fidelity #STRONTIUM campaigns from at least June through... recently (more details in above blog).

You'll see a User-Agent, first/last attempt, # of total attempts, # of unique IPs & unique accounts attempted + a list of accounts
As shipped, it's looking over the past 30 days. But if you have #AzureSentinel, I recommend pasting that same KQL in & searchings logs w/ expanded timeframe.
The # authAttempts can stay where it's at ... #STRONTIUM activity is approx 100 attempts per IP per account
Read 4 tweets
Nick Carr Profile picture
Sep 10, 2020
Pokéregex Challenge:
How many of the 719 Pokémon can you capture in a single regular expression that fits in a tweet?

Here's what to match: gist.githubusercontent.com/itsreallynick/…

Here are awesome regex resources: raw.githubusercontent.com/aloisdg/awesom… [this same text blob will also be used to measure FPs😊]
If you haven't done something like this before, here's a [crappy] bash one-liner to start:

sh -c 'pattern="your|regex"; echo 🎯 Pokémon:; curl -s gist.githubusercontent.com/itsreallynick/… | grep -ioE $pattern | wc -l; echo 🚯 Noise:; curl -s github.com/aloisdg/awesom… | grep -ioE $pattern | wc -l'
Oh, if it wasn't clear ... you put your regular expression in where it says "your|regex"

Because, as written, the results are pretty terrible 😄 [pictured]

This is similar to an interview question @TekDefense & I would ask @ Mandiant.
It's also an #APT32 hunting tweet. 😉🌶️ This is probably a terrible...
Read 7 tweets
Nick Carr Profile picture
Jul 31, 2020
I started playing Pokémon Go with my kids at the start of the COVID-19 pandemic.

I can’t believe how many #infosec Pokémon we’ve caught so far.

Here’s a quick thread – please add since I’m missing many.

First up: I definitely appreciate that they included #FIN7 in this game Image
That last one was much harder to capture than these Iranian TTP Pokémon. ImageImage
This #infosec Pokémon is an absolute thug. It’s fun every year & a new one is appearing soon #flareon7 Image
Read 8 tweets

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