LOG_EXPL_MOVEit_Exploitation_Indicator_Jun23_2

rule LOG_EXPL_MOVEit_Exploitation_Indicator_Jun23_2 {
   meta:
      description = "Detects a potential compromise indicator found in MOVEit Transfer logs"
      author = "Florian Roth"
      reference = "https://www.huntress.com/blog/moveit-transfer-critical-vulnerability-rapid-response"
      date = "2023-06-03"
      score = 70
      id = "1527f5e3-071d-5152-9452-9c4472d258f2"
   strings:
      $a1 = "Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/105.0.5195.102+Safari/537.36" ascii
      $a2 = "Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/105.0.5195.54+Safari/537.36" ascii
      
      $s1 = " POST /moveitisapi/moveitisapi.dll" ascii
      $s2 = " POST /guestaccess.aspx"
      $s3 = " POST /api/v1/folders/"

      $s4 = "/files uploadType=resumable&"
      $s5 = " action=m2 "
   condition:
      1 of ($a*) and 3 of ($s*)
      or all of ($s*)
}