Tips-Of-Mine/PowerHuntShares
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Update PowerHuntShares.psm1

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Adjusting/tuning similarity weights.
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Scott Sutherland 2024-06-13 08:47:50 -05:00 committed by GitHub
parent da05f12082
commit d7d9715b06
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1 changed files with 10 additions and 10 deletions
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PowerHuntShares.psm1
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@ -4,7 +4,7 @@
#--------------------------------------
# Author: Scott Sutherland, 2024 NetSPI
# License: 3-clause BSD
# Version: v1.59
# Version: v1.60
# References: This script includes custom code and code taken and modified from the open source projects PowerView, Invoke-Ping, and Invoke-Parrell.
function Invoke-HuntSMBShares
{
@ -1721,8 +1721,8 @@ function Invoke-HuntSMBShares
# Get % the file group represents for the share
$fgpercentage = [math]::Round($_.count/$ShareFolderGroupCount,4)
# If it's 30% or great flip the bit
if($fgpercentage -ge .3){
# If it's 25% or great flip the bit
if($fgpercentage -ge .25){
$SimularityCalOver30 = 1
}
@ -1773,8 +1773,8 @@ function Invoke-HuntSMBShares
$SimularityCalcLastModDate = $SimularityCalcLastModDate1 / $ShareCount
# Calculate combined similarity score
# WeightFileGroup = 4
# WeightFn802 = 3
# WeightFn802 = 5
# WeightFileGroup = 4
# Weightfg50 = 3
# Weightfg30 = 2
# WeightFgOwnerAvg = 2
@ -1782,17 +1782,17 @@ function Invoke-HuntSMBShares
# WeightLastMod = 1
# condense into 0-1, low (0-.50), medium(.51-.80), high similary (.81-1)
$SimularityCalcShareFgFinal = $SimularityCalcShareFg * 4 # File group ratio
$SameFileNameMeetsThresholdsFinal = $SameFileNameMeetsThresholds * 3 # A file exists in 80% of the file groups associated with the sharename
$SameFileNameMeetsThresholdsFinal = $SameFileNameMeetsThresholds * 5 # A file exists in 80% of the file groups associated with the sharename
$SimularityCalcShareFgFinal = $SimularityCalcShareFg * 4 # File group ratio 11
$SimularityCalc50PFinal = $SimularityCalc50P * 3 # A file group exists that represent 50% or more of the fg population for the sharename
$SimularityCalOver30Final = $SimularityCalOver30 * 2 # A file group exists that represent 30% or more of the fg population for the sharename
$SimularityCalcFGOwnerAvgFinal = $SimularityCalcFGOwnerAvg * 2 # Owner to share file group ratio average
$SimularityCalcCreateDateFinal = $SimularityCalcCreateDate * 1 # Share to creation date ratio
$SimularityCalcLastModDateFinal = $SimularityCalcLastModDate * 1 # Share to modification date ratio
# Max is 4 + 3 + 3 + 2 + 2 + 1 + 1 = 16; Min is 0
# Max is 5 + 4 + 3 + 2 + 2 + 1 + 1 = 17; Min is 0
$SimilarityTotal = $SimularityCalcShareFgFinal + $SameFileNameMeetsThresholdsFinal + $SimularityCalc50PFinal + $SimularityCalOver30Final + $SimularityCalcFGOwnerAvgFinal +$SimularityCalcCreateDateFinal + $SimularityCalcLastModDateFinal
$SimilarityScore = $SimilarityTotal / 16
$SimilarityScore = $SimilarityTotal / 18
$SimilarityScoreP1 = [math]::round(($SimilarityScore.tostring("P") -replace('%','')))
$SimilarityScoreP = "$SimilarityScoreP1%"
If($SimilarityScore -gt .80){ $SimLevel = "High"}
@ -1946,7 +1946,7 @@ function Invoke-HuntSMBShares
<td>80% FN:</td><td>&nbsp;$SameFileNameMeetsThresholds</td>
</tr>
<tr id="ignore">
<td>30% FG:</td><td>&nbsp;$SimularityCalOver30</td>
<td>25% FG:</td><td>&nbsp;$SimularityCalOver30</td>
</tr>
<tr id="ignore">
<td>50% FG:</td><td>&nbsp;$SimularityCalc50P</td>