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Added metadata, string identifiers and operation args

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Matt 2019-01-09 14:29:14 +00:00
parent 4db2335107
commit ebb632e888
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GPG key ID: 2DD462FE98BF38C2
4 changed files with 49 additions and 20 deletions
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58
src/core/operations/YaraRules.mjs
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@ -25,11 +25,28 @@ class YaraRules extends Operation {
this.infoURL = "https://en.wikipedia.org/wiki/YARA";
this.inputType = "ArrayBuffer";
this.outputType = "string";
this.args = [{
name: "Rules",
type: "code",
value: ""
}];
this.args = [
{
name: "Rules",
type: "code",
value: ""
},
{
name: "Show strings",
type: "boolean",
value: false
},
{
name: "Show string lengths",
type: "boolean",
value: false
},
{
name: "Show metadata",
type: "boolean",
value: false
}
];
}
/**
@ -38,6 +55,7 @@ class YaraRules extends Operation {
* @returns {string}
*/
run(input, args) {
const [rules, showStrings, showLengths, showMeta] = args;
return new Promise((resolve, reject) => {
Yara().then(yara => {
let matchString = "";
@ -46,7 +64,7 @@ class YaraRules extends Operation {
for (let i = 0; i < inpArr.length; i++) {
inpVec.push_back(inpArr[i]);
}
const resp = yara.run(inpVec, args[0]);
const resp = yara.run(inpVec, rules);
if (resp.compileErrors.size() > 0) {
for (let i = 0; i < resp.compileErrors.size(); i++) {
const compileError = resp.compileErrors.get(i);
@ -58,16 +76,26 @@ class YaraRules extends Operation {
}
}
const matchedRules = resp.matchedRules;
for (let i = 0; i < matchedRules.keys().size(); i++) {
const ruleMatches = matchedRules.get(matchedRules.keys().get(i));
if (ruleMatches.size() === 0) {
matchString += `Input matches rule "${matchedRules.keys().get(i)}".\n`;
for (let i = 0; i < matchedRules.size(); i++) {
const rule = matchedRules.get(i);
const matches = rule.resolvedMatches;
let meta = "";
if (showMeta && rule.metadata.size() > 0) {
meta += " [";
for (let j = 0; j < rule.metadata.size(); j++) {
meta += `${rule.metadata.get(j).identifier}: ${rule.metadata.get(j).data}, `;
}
meta = meta.slice(0, -2) + "]";
}
if (matches.size() === 0 || !(showStrings || showLengths)) {
matchString += `Input matches rule "${rule.ruleName}"${meta}.\n`;
} else {
matchString += `Rule "${matchedRules.keys().get(i)}" matches:\n`;
for (let j = 0; j < ruleMatches.size(); j++) {
const match = ruleMatches.get(j);
matchString += `Position ${match.location}, length ${match.matchLength}, data: ${match.data}\n`;
matchString += `Rule "${rule.ruleName}"${meta} matches:\n`;
for (let j = 0; j < matches.size(); j++) {
const match = matches.get(j);
if (showStrings || showLengths) {
matchString += `Pos ${match.location}, ${showLengths ? `length ${match.matchLength}, ` : ""}identifier ${match.stringIdentifier}${showStrings ? `, data: "${match.data}"` : ""}\n`;
}
}
}