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r/blueteamsec is a subreddit with 50k 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
: "WhoYouCalling v1.5 is out!"
76 posts
#2
Advice Requests
: "Incident Response Playbooks & Templates – Free Resources"
7 posts
#3
Solution Requests
: "KQL Threat detection: Malicious Copilot Agent"
6 posts
#4
Pain & Anger
: "Windows BitLocker -- Screwed without a Screwdriver"
5 posts
#5
Ideas
: "Reverse Engineering Call Of Duty Anti-Cheat"
1 post
#6
Money Talk
: "Operators of Cryptocurrency Mixers Charged with Money Laundering"
1 post
Popular Topics in r/blueteamsec
#1
Security
: "BeyondTrust Remote Support SaaS Service Security Investigation"
24 posts
#2
Malware
: "NoDelete: NoDelete is a tool that assists in Malware analysis by locking a folder where Malware drops files before deleting them."
23 posts
#3
Vulnerabilities
: "Uncovering Security Vulnerabilities in Intel Trust Domain Extensions"
14 posts
#4
Cybersecurity
: "Active Directory Domain Services Elevation of Privilege Vulnerability (CVE-2025-21293)"
12 posts
#5
Ransomware
: "EByte-Ransomware: Go-Based Ransomware with ChaCha20, ECIES Encryption, and Web Control Panel"
12 posts
#6
Vulnerability
: "4,000,000 WordPress Sites Using Really Simple Security Free and Pro Versions Affected by Critical Authentication Bypass Vulnerability"
9 posts
#7
Tools
: "pytune: Pytune is a post-exploitation tool for enrolling a fake device into Intune with mulitple platform support."
9 posts
#8
Windows
: "New Windows zero-day exposes NTLM credentials, gets unofficial patch"
9 posts
#9
Phishing
: "35 year old Chinese man arrested in Bangkok, driving around populated areas with a SMS blaster with a 3km radio sending 1,000,000 Phishing SMS per hour. ”"
8 posts
#10
Microsoft
: "Microsoft will soon let you clone your voice for Teams meetings "
8 posts
Member Growth in r/blueteamsec
Daily
+18 members(0.0%)
Monthly
+907 members(1.8%)
Yearly
+8k members(17.7%)
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