Last Week in Security (LWiS) - 2023-01-16

SCCM relay to takeover (@_Mayyhem), LAPS 101 (@mega_spl0it), Sliver vs Havoc (@Naw), Defender LPE (@pixiepointsec), CircleCI post mortem, ASRmageddon, and more!

Last Week in Security is a summary of the interesting cybersecurity news, techniques, tools and exploits from the past week. This post covers 2023-01-09 to 2023-01-16.


Techniques and Write-ups

Tools and Exploits

  • secret_handshake - A prototype malware C2 channel using x509 certificates over mTLS.
  • phishim is a phishing tool which reduces configuration time and bypasses most types of MFA by running a chrome tab on the server that the user unknowingly interacts with.
  • CoffLoader - an implementation of in-house CoffLoader supporting CobaltStrike standard BOF and BSS initialized variables.
  • latma - Lateral movement analyzer (LATMA) collects authentication logs from the domain and searches for potential lateral movement attacks and suspicious activity. The tool visualizes the findings with diagrams depicting the lateral movement patterns.
  • gophish - GoPhish automation.
  • CVE-2023-0179: Linux kernel stack buffer overflow in nftables: PoC and writeup. PoC has been pulled for the time being, but as this effects Linux from ~2019 and later, it could be a pretty widespread LPE and potentially some LAN crashes or RCE.
  • LocalPotato is coming soon! - Watch this space.
  • Issue 2361: XNU race condition in vm_map_copy_overwrite_unaligned allows writing to read-only mappings. Ian Beer drops his "MacDirtyCow" which is already being used in the jailbreaking scene to do non-persistent tweaks.
  • OffensivePipeline allows you to download and build C# tools, applying certain modifications in order to improve their evasion for Red Team exercises. Version 2 just dropped.
  • Open Sourcing Incident Management system. The HARP incident management system, designed to help teams quickly and effectively respond to and resolve any incidents that may occur, specifically in the tech industry, is now open source!

New to Me and Miscellaneous

This section is for news, techniques, write-ups, tools, and off-topic items that weren't released last week but are new to me. Perhaps you missed them too!

  • Crassus - Windows privilege escalation discovery tool
  • ShellWasp is a tool to help build shellcode that utilizes Windows syscalls, while overcoming the portability problem associated with Windows syscalls. ShellWasp is built for 32-bit, WoW64.

Techniques, tools, and exploits linked in this post are not reviewed for quality or safety. Do your own research and testing. This post is cross-posted on SIXGEN's blog.