smx-smx

XZ Backdoor symbol deobfuscation. Updated as i make progress

nasbench

# Source: System.Management.Automation.dll
# This list is used to determin if a ScriptBlock contains potential suspicious content
# If a match is found an automatic 4104 with a "warning" level is generated.
# https://github.com/PowerShell/PowerShell/blob/master/src/System.Management.Automation/engine/runtime/CompiledScriptBlock.cs
- "Add-Type"
- "AddSecurityPackage"
- "AdjustTokenPrivileges"
- "AllocHGlobal"
- "BindingFlags"
- "Bypass"

SwitHak

Security Advisories / Bulletins / vendors Responses linked to Log4Shell (CVE-2021-44228)

Errors, typos, something to say ?

• If you want to add a link, comment or send it to me
• Feel free to report any mistake directly below in the comment or in DM on Twitter @SwitHak

Other great resources

• Royce Williams list sorted by vendors responses Royce List
• Very detailed list NCSC-NL
• The list maintained by U.S. Cybersecurity and Infrastructure Security Agency: CISA List

Neo23x0

log4j RCE Exploitation Detection

You can use these commands and rules to search for exploitation attempts against log4j RCE vulnerability CVE-2021-44228

Grep / Zgrep

This command searches for exploitation attempts in uncompressed files in folder /var/log and all sub folders

sudo egrep -I -i -r '\$(\{|%7B)jndi:(ldap[s]?|rmi|dns|nis|iiop|corba|nds|http):/[^\n]+' /var/log

Neo23x0

I've transformed this gist into a git repository.

---

Whenever you research a certain vulnerability ask yourself these questions and please answer them for us

Logging

Does the exploited service write a log?
(check ls -lrt /var/log or lsof +D /var/log/ or lsof | grep servicename)