Initial commit - 611 cybersecurity skills across all subdomains

skills/detecting-dll-sideloading-attacks/references/workflows.md

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+# Detailed Hunting Workflow - DLL Sideloading
+
+## Phase 1: Sysmon DLL Load Analysis
+
+### Step 1.1 - Unsigned DLLs Loaded by Signed Applications
+```spl
+index=sysmon EventCode=7 Signed=false
+| where match(Image, "(?i)\\\\(Program Files|Windows)\\\\")
+| where NOT match(ImageLoaded, "(?i)\\\\(Windows|Program Files)\\\\")
+| stats count by Image ImageLoaded Signature Computer
+| sort -count
+```
+
+### Step 1.2 - DLL Loads from Unusual Directories
+```spl
+index=sysmon EventCode=7
+| where match(ImageLoaded, "(?i)(\\\\temp\\\\|\\\\appdata\\\\|\\\\public\\\\|\\\\downloads\\\\)")
+| where Signed=false OR Signature="?"
+| stats count by Image ImageLoaded Computer User
+| sort -count
+```
+
+### Step 1.3 - KQL for MDE DLL Sideloading
+```kql
+DeviceImageLoadEvents
+| where Timestamp > ago(7d)
+| where InitiatingProcessFileName in~ ("OneDriveUpdater.exe","DismHost.exe","WerFault.exe")
+| where not(FolderPath startswith "C:\\Windows" or FolderPath startswith "C:\\Program Files")
+| project Timestamp, DeviceName, InitiatingProcessFileName, FolderPath, FileName, SHA256
+```
+
+## Phase 2: Legitimate App in Wrong Location
+
+### Step 2.1 - Signed Binaries Running Outside Standard Paths
+```spl
+index=sysmon EventCode=1
+| where NOT match(Image, "(?i)^(C:\\\\Windows|C:\\\\Program Files)")
+| where match(Image, "(?i)(svchost|explorer|rundll32|dllhost|OneDrive|Teams)\.exe$")
+| table _time Computer User Image CommandLine ParentImage Hashes
+```
+
+## Phase 3: Hash-Based Detection
+
+### Step 3.1 - Known-Bad DLL Hashes
+Compare loaded DLL hashes against threat intelligence:
+```spl
+index=sysmon EventCode=7
+| rex field=Hashes "SHA256=(?<sha256>[A-Fa-f0-9]{64})"
+| lookup threat_intel_hashes sha256 OUTPUT malware_family confidence
+| where isnotnull(malware_family)
+| table _time Computer Image ImageLoaded sha256 malware_family
+```
+
+## Phase 4: Behavioral Correlation
+
+### Step 4.1 - Network Activity After DLL Load
+Correlate DLL loads with subsequent network connections:
+```spl
+index=sysmon EventCode=7 Signed=false
+| rename Image as proc_image
+| join proc_image Computer [
+    search index=sysmon EventCode=3
+    | rename Image as proc_image
+    | where NOT match(DestinationIp, "^(10\.|172\.|192\.168\.)")
+]
+| table _time Computer proc_image ImageLoaded DestinationIp DestinationPort
+```