Nick Carr Profile picture
Oct 29, 2019 4 tweets 3 min read Read on X
Word to your moms (certutil qualms)
They came to drop FOMBs!
🆕 #ManagedDefense Blog: fireeye.com/blog/threat-re…
Our awesome global SOC team ran into something interesting:
1️⃣ WMI compiled .bmf files (FOMB file magic) – new [to me] implementation
2️⃣ Weaver exploit (still no CVE!) ImageImageImage
Blog/section titles that should make all dads proud:
• The analysts who found it & authored the blog are in the Dublin SOC – so the blog title is a homage to @houseofpain1's 2/3 Irish heritage.
• Everybody’s Working for the Recon
• FOMBs Away
• String it to Weaver
Really great to see the SOC share a glimpse of the activity they deal with every day. They did all the hard work here.

I added the note on origins of mofcomp usage from @cglyer and @_devonkerr_'s 2014 "There’s Something about WMI" talk: fireeye.com/content/dam/fi…
I love that the authors shared the public binary MOF file (.bmf) decompiler in case it benefits other analysts & #DFIR peeps: github.com/pali/bmfdec
You can play along at home with the in-the-wild FOMB from the blog.

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More from @ItsReallyNick

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
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
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
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
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
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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