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/r/blueteamsec/

r/blueteamsec

55k members
r/blueteamsec is a subreddit with 55k members. Its distinguishing qualities are that the community is large in size, and has high activity.
We focus on technical intelligence, research and engineering to help operational [blue|purple] teams defend their estates and have awareness of the world.

Popular Themes in r/blueteamsec

#1
News
: "Fact Sheet: President Donald J. Trump Reprioritizes Cybersecurity Efforts to Protect America"
63 posts
#2
Solution Requests
: "Batteries included collaborative knowledge management solution for Threat intelligence researchers"
6 posts
#3
Pain & Anger
: "Hacking My Car, and probably yours— Security Flaws in Volkswagen’s App - asked for an NDA to be signed to understand remediation plans"
2 posts
#4
Advice Requests
: "Learning Cybersecurity from Scratch in 2025 – My Journey, Tools, and Lessons (SOC & Blue Team Focus)"
1 post

Popular Topics in r/blueteamsec

#1

Security

: "Microsoft Probing If Chinese Hackers Learned SharePoint Flaws Through Alert - Microsoft Corp. is investigating whether a leak from its early alert system for cyberSecurity companies allowed Chinese hackers to exploit flaws in its SharePoint service before they were patched"
28 posts
#2

Malware

: "OtterCookie: Analysis of New Lazarus Group Malware"
25 posts
#3

Vulnerability

: "When a new Vulnerability hits the news, how quickly do you assess your exposure?"
16 posts
#4

Cybersecurity

: "Fact Sheet: President Donald J. Trump Reprioritizes Cybersecurity Efforts to Protect America"
13 posts
#5

Phishing

: "Azure Front Door AiTM Phishing"
12 posts
#6

Exploit

: "Buried in the Log. Exploiting a 20 years old NTFS Vulnerability"
11 posts
#7

Threat

: "CISO shares why shifting from NIST compliance to MITRE Threat modeling changed how their team works"
10 posts
#8

Exploitation

: "Decrement by one to rule them all: AsIO3.sys driver Exploitation"
9 posts
#9

Vulnerabilities

: "Customer guidance for SharePoint vulnerability CVE-2025-53770 | Microsoft is aware of active attacks targeting on-premises SharePoint Server customers. The attacks are exploiting a variant of CVE-2025-49706. This vulnerability has been assigned CVE-2025-53770."
8 posts
#10

Ransomware

: "Build-Your-Own-Ransomware: Hands-On Offensive and Defensive Insights"
7 posts

Member Growth in r/blueteamsec

Yearly
+10k members(22.5%)

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