implement directory option

config/eventkey_alias.txt

@@ -13,7 +13,7 @@ ServiceName,Event.EventData.ServiceName
 ImagePath,Event.EventData.ImagePath
 ContextInfo,Event.EventData.ContextInfo
 Path,Event.EventData.Path
-ScriptBlockText,Event.EventData.ScriptBlockText#Name
+ScriptBlockText,Event.EventData.ScriptBlockText
 MemberName,Event.EventData.SubjectUserName
 MemberSid,Event.EventData.SubjectUserSid
 TargetSid,Event.EventData.TargetSid

src/detections/configs.rs

@@ -47,7 +47,7 @@ fn build_app() -> clap::App<'static, 'static> {
         .arg(Arg::from_usage("--human-readable-timeline=[HUMAN_READABLE_TIMELINE] 'human readable timeline'"))
         .arg(Arg::from_usage("-l --lang=[LANG] 'output language'"))
         .arg(Arg::from_usage("-t --timezone=[TIMEZONE] 'timezone setting'"))
-        .arg(Arg::from_usage("-d --directory 'event log files directory'"))
+        .arg(Arg::from_usage("-d --directory=[DIRECTORY] 'event log files directory'"))
         .arg(Arg::from_usage("-s --statistics 'event statistics'"))
         .arg(Arg::from_usage("-u --update 'signature update'"))
         .arg(Arg::from_usage("--credits 'Zachary Mathis, Akira Nishikawa'"))

src/detections/detection.rs

@@ -1,13 +1,15 @@
 extern crate chrono;
 extern crate csv;
 
+use std::path::PathBuf;
+
 use crate::detections::print::Message;
 use crate::detections::rule;
 use crate::detections::rule::RuleNode;
 use crate::yaml::ParseYaml;
 
-use chrono::{DateTime, FixedOffset, TimeZone, Utc};
-use evtx::EvtxParser;
+use evtx::err;
+use evtx::{EvtxParser, SerializedEvtxRecord};
 use serde_json::{Error, Value};
 
 const DIRPATH_RULES: &str = "rules";
@@ -21,37 +23,92 @@ impl Detection {
         Detection {}
     }
 
-    pub fn start(&mut self, mut parser: EvtxParser<std::fs::File>) {
-        // serialize from .etvx to jsons
-        let event_records: Vec<Value> = parser
-            .records_json()
-            .filter_map(|result_record| {
-                if result_record.is_err() {
-                    eprintln!("{}", result_record.unwrap_err());
-                    return Option::None;
+    pub fn start(&mut self, evtx_files: Vec<PathBuf>) {
+        if evtx_files.is_empty() {
+            return;
         }
 
-                //// https://rust-lang-nursery.github.io/rust-cookbook/encoding/complex.html
-                let result_json: Result<Value, Error> =
-                    serde_json::from_str(&result_record.unwrap().data);
+        // parse rule files
+        let mut selection_rules = self.parse_rule_files();
+        if selection_rules.is_empty() {
+            return;
+        }
+
+        // serialize from evtx files to json
+        let evtx_records = self.serialize_evtx_to_jsons(evtx_files);
+
+        // select rule files and collect message
+        let mut message = Message::new();
+        selection_rules.iter_mut().for_each(|rule| {
+            evtx_records.iter().for_each(|event_record| {
+                if !rule.select(event_record) {
+                    return;
+                }
+
+                message.insert(
+                    event_record,
+                    rule.yaml["output"].as_str().unwrap_or("").to_string(),
+                )
+            });
+        });
+
+        // output message
+        message.print();
+    }
+
+    // serialize evtx files to json
+    fn serialize_evtx_to_jsons(&self, evtx_files: Vec<PathBuf>) -> Vec<Value> {
+        return evtx_files
+            .iter()
+            .filter_map(|evtx_file| {
+                // convert to evtx parser
+                match EvtxParser::from_path(evtx_file) {
+                    Ok(parser) => Option::Some(parser),
+                    Err(e) => {
+                        eprintln!("{}", e);
+                        return Option::None;
+                    }
+                }
+            })
+            .map(|mut cur| {
+                let ret: Vec<err::Result<SerializedEvtxRecord<String>>> =
+                    cur.records_json().collect();
+                return ret;
+            })
+            .flatten()
+            .filter_map(|json_record| {
+                // convert from evtx parser to evtx json string records
+                if json_record.is_ok() {
+                    return Option::Some(json_record.unwrap());
+                } else {
+                    eprintln!("{}", json_record.unwrap_err());
+                    return Option::None;
+                }
+            })
+            .filter_map(|json_record| {
+                // serialize json from json string
+                let result_json: Result<Value, Error> = serde_json::from_str(&json_record.data); //// https://rust-lang-nursery.github.io/rust-cookbook/encoding/complex.html
                 if result_json.is_err() {
                     eprintln!("{}", result_json.unwrap_err());
                     return Option::None;
-                }
+                } else {
                     return result_json.ok();
+                }
             })
             .collect();
+    }
 
+    fn parse_rule_files(&self) -> Vec<RuleNode> {
         // load rule files
         let mut rulefile_loader = ParseYaml::new();
         let resutl_readdir = rulefile_loader.read_dir(DIRPATH_RULES);
         if resutl_readdir.is_err() {
             eprintln!("{}", resutl_readdir.unwrap_err());
-            return;
+            return vec![];
         }
 
         // parse rule files
-        let mut selection_rules: Vec<RuleNode> = rulefile_loader
+        return rulefile_loader
             .files
             .into_iter()
             .map(|rule_file| rule::parse_rule(rule_file))
@@ -79,23 +136,5 @@ impl Detection {
                 return Option::None;
             })
             .collect();
-
-        // selection rule files and collect message
-        let mut message = Message::new();
-        selection_rules.iter_mut().for_each(|rule| {
-            event_records.iter().for_each(|event_record| {
-                if !rule.select(event_record) {
-                    return;
-                }
-
-                message.insert(
-                    event_record,
-                    rule.yaml["output"].as_str().unwrap_or("").to_string(),
-                )
-            });
-        });
-
-        // output message
-        message.print();
     }
 }

src/main.rs

@@ -2,9 +2,8 @@ extern crate serde;
 #[macro_use]
 extern crate serde_derive;
 
-use evtx::EvtxParser;
 use quick_xml::de::DeError;
-use std::{fs, path::PathBuf, process};
+use std::{fs, path::PathBuf};
 use yamato_event_analyzer::afterfact::after_fact;
 use yamato_event_analyzer::detections::configs;
 use yamato_event_analyzer::detections::detection;
@@ -12,7 +11,10 @@ use yamato_event_analyzer::omikuji::Omikuji;
 
 fn main() -> Result<(), DeError> {
     if let Some(filepath) = configs::singleton().args.value_of("filepath") {
-        parse_file(&filepath);
+        detect_files(vec![PathBuf::from(filepath)]);
+    } else if let Some(directory) = configs::singleton().args.value_of("directory") {
+        let evtx_files = collect_evtxfiles(&directory);
+        detect_files(evtx_files);
     }
 
     after_fact();
@@ -20,22 +22,64 @@ fn main() -> Result<(), DeError> {
     Ok(())
 }
 
-fn parse_file(filepath: &str) {
-    let fp = PathBuf::from(filepath);
-    let parser = match EvtxParser::from_path(fp) {
-        Ok(pointer) => pointer,
-        Err(e) => {
-            eprintln!("{}", e);
-            process::exit(1);
+fn collect_evtxfiles(dirpath: &str) -> Vec<PathBuf> {
+    let entries = fs::read_dir(dirpath);
+    if entries.is_err() {
+        eprintln!("{}", entries.unwrap_err());
+        return vec![];
     }
-    };
 
-    let mut detection = detection::Detection::new();
-    &detection.start(parser);
+    let mut ret = vec![];
+    for e in entries.unwrap() {
+        if e.is_err() {
+            continue;
+        }
+
+        let path = e.unwrap().path();
+        if path.is_dir() {
+            path.to_str().and_then(|path_str| {
+                let subdir_ret = collect_evtxfiles(path_str);
+                ret.extend(subdir_ret);
+                return Option::Some(());
+            });
+        } else {
+            let path_str = path.to_str().unwrap_or("");
+            if path_str.ends_with(".evtx") {
+                ret.push(path);
+            }
+        }
+    }
+
+    return ret;
 }
 
-fn output_with_omikuji(omikuji: Omikuji) {
+fn detect_files(evtx_files: Vec<PathBuf>) {
+    let mut detection = detection::Detection::new();
+    &detection.start(evtx_files);
+}
+
+fn _output_with_omikuji(omikuji: Omikuji) {
     let fp = &format!("art/omikuji/{}", omikuji);
     let content = fs::read_to_string(fp).unwrap();
     println!("{}", content);
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::collect_evtxfiles;
+
+    #[test]
+    fn test_collect_evtxfiles() {
+        let files = collect_evtxfiles("test_files/evtx");
+        assert_eq!(3, files.len());
+
+        files.iter().for_each(|file| {
+            let is_contains = &vec!["test1.evtx", "test2.evtx", "testtest4.evtx"]
+                .into_iter()
+                .any(|filepath_str| {
+                    return file.file_name().unwrap().to_str().unwrap_or("") == filepath_str;
+                });
+            assert_eq!(is_contains, &true);
+        })
+    }
+}