Nasreddine Bencherchali
be359ef3f2
Create Release / Create Release (push) Has been cancelled
fix: Kerberos Manipulation - Update field to use Status instead of incorrect "FailureCode" fix: Metasploit SMB Authentication - Remove unnecessary field fix: Service Installation in Suspicious Folder - Update FP filter update: Malicious PowerShell Commandlets - ProcessCreation - "Start-Dnscat2" remove: Dnscat Execution - Deprecated in favour of an integration in the "Malicious PowerShell Cmdlet" type of rules remove: SAM Dump to AppData update: Critical Hive In Suspicious Location Access Bits Cleared - Enhance metadata and logic update: Malicious PowerShell Commandlets - PoshModule - "Start-Dnscat2" update: Malicious PowerShell Commandlets - ScriptBlock - "Start-Dnscat2" update: Malicious PowerShell Scripts - FileCreation - Add "dnscat2.ps1" update: Malicious PowerShell Scripts - PoshModule - Add "dnscat2.ps1" update: Monitoring For Persistence Via BITS - Use "Image" and "OriginalFileName" fields instead of CLI only update: New or Renamed User Account with '$' Character - Reduced level to "medium" update: New Process Created Via Taskmgr.EXE - Added full paths to the filtered binaries to decrease false negatives update: Potential Dropper Script Execution Via WScript/CScript - Re-wrote the logic by removing the paths "C:\Users" and "C:\ProgramData". As these are very common and will generate high FP rate. Instead switched the paths to a more robust list and extended the list of extension covered. Also reduced the level to "medium" update: Potential Fake Instance Of Hxtsr.EXE Executed - Remove "C:" prefix from detection logic update: Prefetch File Deleted - Update selection to remove 'C:' prefix update: Sensitive File Access Via Volume Shadow Copy Backup - Made the rule more generic by updating the title and removing the IOC from conti. (will be added in a dedicated rule) update: Shell Process Spawned by Java.EXE - Add "bash.exe" update: Suspicious PowerShell Download - Powershell Script - Add "DownloadFileAsync" and "DownloadStringAsync" functions update: Suspicious Processes Spawned by Java.EXE - Remove "bash.exe" as its doesn't fit the logic update: Sysmon Application Crashed - Add 32bit version of sysmon binary update: Tap Driver Installation - Security - Reduce level to "low" update: Write Protect For Storage Disabled - Remove "storagedevicepolicies" as the string "storage" already covers it --------- Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
24 lines
715 B
YAML
24 lines
715 B
YAML
title: Dnscat Execution
|
|
id: a6d67db4-6220-436d-8afc-f3842fe05d43
|
|
status: deprecated # In favour of the more generic Susp and Malicious Cmdlet rules
|
|
description: Dnscat exfiltration tool execution
|
|
author: Daniil Yugoslavskiy, oscd.community
|
|
date: 2019/10/24
|
|
modified: 2024/01/25
|
|
tags:
|
|
- attack.exfiltration
|
|
- attack.t1048
|
|
- attack.execution
|
|
- attack.t1059.001
|
|
logsource:
|
|
product: windows
|
|
category: ps_script
|
|
definition: 'Requirements: Script Block Logging must be enabled'
|
|
detection:
|
|
selection:
|
|
ScriptBlockText|contains: 'Start-Dnscat2'
|
|
condition: selection
|
|
falsepositives:
|
|
- Legitimate usage of PowerShell Dnscat2 — DNS Exfiltration tool (unlikely)
|
|
level: critical
|