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Enkel og effektiv herding av Windows
ODDVAR MOE
- Red teamer @TrustedSec
- Security geek / Blogger /
Speaker
- Microsoft MVP 5 years
- Working with IT since 2000
- Security Research
❤ Memes
@oddvarmoe - https://oddvar.moe
Enkle herdinger
• Makroer
• HTA/JS/JSE
• LAPS / Prevent Local Admin
Lateral Movement
• SMB Signing
• LSASS Protection
Makroer
• Ubestridt mest
populære
angrepsvektor
Deaktivere Makroer
Deaktivere
Makroer
Deaktivere Makroer
• Kan også gjøres gjennom Intune
https://helgeklein.com/blog/2019/07/blocking-office-macros-
managing-windows-macos-via-intune/
HTA/JS/JSE filer
• Ofte en link i epost
• Eksekverer kode
HTA/JS/JSE filer
• Ofte en link i epost
• Eksekverer kode
Endre oppførsel til HTA/JS/JSE filer
LAPS
• Unikt administrator passord
• https://Aka.ms/laps
• Forhindrer klassisk lateral movement med Pass-the-Hash
• Enkelt å implementere (15m)
Guide på Norsk: https://channel9.msdn.com/Blogs/MVP-Cloud-
DataCenter/Gjennomgang-av-Local-Administrator-Password-Solution-
LAPS
LAPS
High level:
• Schema extension
• MSI/DLL fil installeres I miljøet
• En GPO lages med riktige innstillinger for ønsket passord policy
Forhindre Lateral Movement
Et annet enkelt og effektivt triks:
SMB Signing
• Forhindrer Man-in-The-Middle / Replay
• Kan påvirke ytelse
• Ingen grunn til ikke å slå på
SMB Signing
LSASS Protection
• Gjør det vanskeligere å dumpe LSASS
• Krever mer innsats av angriper
LSASS Protection
LSASS Protection
LSASS Protection
Andre tips
• Lokal administrator
• AppLocker / Device Guard
• BitLocker
• Logging / Windows Event forwarding
• Microsoft Defender Advanced Threat Protection
• Baselines
• https://adsecurity.org/?p=3299
Andre tips
• https://docs.microsoft.com/en-us/windows/security/threat-
protection/windows-security-baselines
• https://www.trustedsec.com/blog/4-free-easy-wins-that-make-
red-teams-harder/
• https://docs.microsoft.com/en-us/windows/security/threat-
protection/windows-defender-application-
control/applocker/applocker-overview
TAKK FOR MEG
Mail: Oddvar.moe@trustedsec.com
Twitter: @oddvarmoe
Enkel og effektiv herding av windows

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Enkel og effektiv herding av windows