diff --git a/nselib/msrpc.lua b/nselib/msrpc.lua
index bdee9b8cb..e3733d82c 100644
--- a/nselib/msrpc.lua
+++ b/nselib/msrpc.lua
@@ -5083,21 +5083,4 @@ function get_pad(data, align, pad_byte)
   return string.rep(pad_byte, (align-#data%align)%align)
 end
 
---####################################################################--
----Generates a random string of the requested length.
---@param length The length of the string to return.
---@param charset    The set of letters to choose from. Default: ASCII letters and numbers
---@return The random string.
---####################################################################--
-function random_crap(length, charset)
-  charset = charset or "0123456789abcdefghijklmnoprstuvzxwyABCDEFGHIJKLMNOPRSTUVZXWY"
-  local random_str = ""
-  for i = 1, length, 1 do
-    local random = math.random(#charset)
-    random_str = random_str .. string.sub(charset, random, random)
-  end
-  return random_str
-end
-
-
 return _ENV;
diff --git a/scripts/dns-nsec3-enum.nse b/scripts/dns-nsec3-enum.nse
index 94d4cdda1..76c241884 100644
--- a/scripts/dns-nsec3-enum.nse
+++ b/scripts/dns-nsec3-enum.nse
@@ -168,14 +168,10 @@ local function empty(t)
   return not next(t)
 end
 
-local function random_string()
-  return msrpc.random_crap(8,"etaoinshrdlucmfw")
-end
-
 -- generate a random hash with domains suffix
 -- return both domain and its hash
 local function generate_hash(domain, iter, salt)
-  local rand_str = random_string()
+  local rand_str = stdnse.generate_random_string(8, "etaoinshrdlucmfw")
   local random_domain = rand_str .. "." .. domain
   local packed_domain = {}
   for word in string.gmatch(random_domain, "[^%.]+") do
@@ -239,7 +235,7 @@ local function enum(host, port, domain)
   local todo = {}
   local dnssec, status, result = false, false, "No Answer"
   local result = {}
-  local subdomain = msrpc.random_crap(8,"etaoinshrdlucmfw")
+  local subdomain = stdnse.generate_random_string(8, "etaoinshrdlucmfw")
   local full_domain = join({subdomain, domain})
   local iter
   local salt
diff --git a/scripts/smb-check-vulns.nse b/scripts/smb-check-vulns.nse
index 54e7a31d6..938129d80 100644
--- a/scripts/smb-check-vulns.nse
+++ b/scripts/smb-check-vulns.nse
@@ -474,9 +474,9 @@ function check_ms06_025(host)
   end
   local req, buff, sr_result
   req = msrpc.RRAS_marshall_RequestBuffer(
-  0x01,
-  msrpc.RRAS_RegTypes['GETDEVCONFIG'],
-  msrpc.random_crap(3000))
+    0x01,
+    msrpc.RRAS_RegTypes['GETDEVCONFIG'],
+    stdnse.generate_random_string(3000, "0123456789abcdefghijklmnoprstuvzxwyABCDEFGHIJKLMNOPRSTUVZXWY"))
   status, sr_result = msrpc.RRAS_SubmitRequest(smbstate, req)
   msrpc.stop_smb(smbstate)
   --sanity check