A simple tool that will help you delete files on buckets with MFA Delete feature enabled.

mfa-delete-execute.rb

#!/usr/bin/env ruby
require 'aws-sdk'
 
print "AWS Account ID: "
aws_account_id = STDIN.gets.chomp
print "S3 bucket name: "
bucket_name = STDIN.gets.chomp
print "AWS Access Key ID: "
aws_id      = STDIN.gets.chomp
print "AWS Access Secret Key: "
aws_key     = STDIN.gets.chomp
 
s3_endpoint = "s3.amazonaws.com"
 
mfa_serial  = "arn:aws:iam::#{aws_account_id}:mfa/root-account-mfa-device"
 
s3 = AWS::S3.new({
  :s3_endpoint => s3_endpoint,
  :access_key_id => aws_id,
  :secret_access_key => aws_key
})
  
bucket = s3.buckets[bucket_name]
ARGV.each do |arg|
  key, version = arg.split(":")
  object = bucket.objects[key]
  object_version = object.versions[version] if object
  if object_version
    print "AWS Root MFA Token (can be used once only): "
    mfa_token = STDIN.gets.chomp
        object_version.delete :mfa=>"#{mfa_serial} #{mfa_token}"
    puts "Deleted: #{key}:#{version}"
  else
    puts "Not Found: #{key}:#{version}"
  end
end