├── .gitattributes
├── .gitignore
├── Cargo.lock
├── Cargo.toml
├── README.md
├── input.js
├── output.js
└── src
├── lib.rs
├── main.rs
└── transform
├── mod.rs
└── visit
├── functions.rs
├── mod.rs
└── strings.rs
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568 | ]
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571 | name = "px-deobfuscator"
572 | version = "0.1.0"
573 | dependencies = [
574 | "oxc_allocator",
575 | "oxc_ast",
576 | "oxc_codegen",
577 | "oxc_parser",
578 | "oxc_semantic",
579 | "oxc_span",
580 | "oxc_syntax",
581 | "rustc-hash",
582 | ]
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679 | "itoa",
680 | "memchr",
681 | "ryu",
682 | "serde",
683 | ]
684 |
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687 | version = "0.3.11"
688 | source = "registry+https://github.com/rust-lang/crates.io-index"
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690 |
691 | [[package]]
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694 | source = "registry+https://github.com/rust-lang/crates.io-index"
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712 | source = "registry+https://github.com/rust-lang/crates.io-index"
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714 | dependencies = [
715 | "proc-macro2",
716 | "quote",
717 | "unicode-ident",
718 | ]
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720 | [[package]]
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722 | version = "0.16.1"
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725 | dependencies = [
726 | "smawk",
727 | "unicode-linebreak",
728 | "unicode-width 0.1.14",
729 | ]
730 |
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732 | name = "thiserror"
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737 | "thiserror-impl",
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739 |
740 | [[package]]
741 | name = "thiserror-impl"
742 | version = "1.0.65"
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752 | name = "unicode-id-start"
753 | version = "1.3.1"
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768 |
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780 |
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783 | version = "0.8.0"
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785 | checksum = "5c3082ca00d5a5ef149bb8b555a72ae84c9c59f7250f013ac822ac2e49b19c64"
786 |
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788 | name = "windows-targets"
789 | version = "0.52.6"
790 | source = "registry+https://github.com/rust-lang/crates.io-index"
791 | checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
792 | dependencies = [
793 | "windows_aarch64_gnullvm",
794 | "windows_aarch64_msvc",
795 | "windows_i686_gnu",
796 | "windows_i686_gnullvm",
797 | "windows_i686_msvc",
798 | "windows_x86_64_gnu",
799 | "windows_x86_64_gnullvm",
800 | "windows_x86_64_msvc",
801 | ]
802 |
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810 | name = "windows_aarch64_msvc"
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812 | source = "registry+https://github.com/rust-lang/crates.io-index"
813 | checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
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816 | name = "windows_i686_gnu"
817 | version = "0.52.6"
818 | source = "registry+https://github.com/rust-lang/crates.io-index"
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845 | [[package]]
846 | name = "windows_x86_64_msvc"
847 | version = "0.52.6"
848 | source = "registry+https://github.com/rust-lang/crates.io-index"
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850 |
--------------------------------------------------------------------------------
/Cargo.toml:
--------------------------------------------------------------------------------
1 | [package]
2 | name = "px-deobfuscator"
3 | version = "0.1.0"
4 | edition = "2021"
5 |
6 | [dependencies]
7 | oxc_allocator = "0.34.0"
8 | oxc_ast = "0.34.0"
9 | oxc_codegen = "0.34.0"
10 | oxc_parser = "0.34.0"
11 | oxc_semantic = "0.34.0"
12 | oxc_span = "0.34.0"
13 | oxc_syntax = "0.34.0"
14 | rustc-hash = "2.0.0"
15 |
16 | [profile.release]
17 | lto = true
18 | codegen-units = 1
19 | opt-level = 3
20 | panic = "abort"
21 | incremental = true
22 | debug = "none"
23 | strip = "symbols"
24 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 |
11 |
12 | ---
13 |
14 | ### 📞 Contact
15 |
16 | - Discord: `mciemmmmmmmmmm`
17 | - Telegram: `t.me/sddasdasdas`
18 |
19 | ### ⚙️ Installation
20 |
21 | - Requires: `rust`
22 |
23 | ---
24 |
25 | ### 📝 Description
26 |
27 | Really simple deobfuscator for PerimeterX init.js script.
28 | Right now only deobfuscates strings, might add more features in the future.
29 |
30 | To get the best performance, use the `--release` flag when building.
31 |
32 | ---
33 |
34 | ### 🤷 How to use
35 |
36 | - Build project:
37 | ```bash
38 | cargo build --release
39 | ```
40 |
41 | - Navigate to the target folder:
42 | ```bash
43 | cd target/release
44 | ```
45 |
46 | - Run:
47 | ```bash
48 | ./px-deobfuscator
49 | ```
50 |
51 | ---
52 |
53 | ### 🔥 Features
54 |
55 | - very fast, bcs its rust and oxc
56 | - deobfuscates strings
57 |
58 | ---
59 |
60 | ### 🚀 Milestones
61 |
62 | - [ ] Delete unused variables
63 | - [ ] Handle ints that are stored in objects
64 | - [ ] ...
65 |
66 | ---
67 |
68 | ### 📜 ChangeLog
69 |
70 | ```diff
71 | v1.0.0 ⋮ 04/02/2024
72 | ! Initial Release (alpha version)
73 | ```
74 |
75 | ---
76 |
--------------------------------------------------------------------------------
/input.js:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/mciem/px-deobfuscator/451e172b95bdbbfd51f6194c74e9266a943adcbb/input.js
--------------------------------------------------------------------------------
/output.js:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/mciem/px-deobfuscator/451e172b95bdbbfd51f6194c74e9266a943adcbb/output.js
--------------------------------------------------------------------------------
/src/lib.rs:
--------------------------------------------------------------------------------
1 | pub mod transform;
2 |
--------------------------------------------------------------------------------
/src/main.rs:
--------------------------------------------------------------------------------
1 | use oxc_allocator::Allocator;
2 | use oxc_codegen::{Codegen, CodegenOptions};
3 | use oxc_parser::Parser;
4 | use oxc_span::SourceType;
5 |
6 | use std::env::args;
7 |
8 | use px_deobfuscator::transform::Transform;
9 |
10 | pub fn parse(js_code: &str) -> () {
11 | let source_type: SourceType = SourceType::default().with_module(true);
12 | let allocator = Allocator::default();
13 |
14 | let parsed = Parser::new(&allocator, js_code, source_type).parse();
15 |
16 | let program = allocator.alloc(parsed.program);
17 | let mut transform = Transform::new(&allocator);
18 |
19 | transform.transform(program);
20 |
21 | let source_text = Codegen::new()
22 | .with_options(CodegenOptions::default())
23 | .build(program)
24 | .code;
25 |
26 | std::fs::write("output.js", source_text).unwrap();
27 | }
28 |
29 | fn main() {
30 | let start = std::time::Instant::now();
31 |
32 | let args = args().collect::>();
33 | let mut file = &args[1]; // ./px-deobfuscator
34 | if file == "." {
35 | // cargo run .
36 | file = &args[2];
37 | }
38 |
39 | let js_code = std::fs::read_to_string(file).unwrap();
40 |
41 | parse(js_code.as_str());
42 |
43 | println!("Elapsed: {:?}", start.elapsed());
44 | }
45 |
--------------------------------------------------------------------------------
/src/transform/mod.rs:
--------------------------------------------------------------------------------
1 | use oxc_allocator::Allocator;
2 | use oxc_ast::ast::*;
3 | use oxc_ast::AstBuilder;
4 | use oxc_ast::VisitMut;
5 | use std::collections::HashMap;
6 |
7 | mod visit;
8 |
9 | use visit::{functions::FunctionVisitor, strings::StringsVisitor};
10 |
11 | pub struct Transform<'a> {
12 | pub allocator: &'a Allocator,
13 | pub ast: AstBuilder<'a>,
14 | pub imports: HashMap,
15 | }
16 |
17 | impl<'a> Transform<'a> {
18 | pub fn new(allocator: &'a Allocator) -> Self {
19 | Self {
20 | allocator,
21 | ast: AstBuilder::new(allocator),
22 | imports: HashMap::new(),
23 | }
24 | }
25 |
26 | pub fn get_imports(&self) -> &HashMap {
27 | &self.imports
28 | }
29 |
30 | pub fn transform(&mut self, program: &mut Program<'a>) {
31 | let mut func_visitor = FunctionVisitor::new(self.allocator);
32 | func_visitor.visit_program(program);
33 |
34 | StringsVisitor::new(self.allocator, func_visitor.functions).visit_program(program);
35 | }
36 | }
37 |
--------------------------------------------------------------------------------
/src/transform/visit/functions.rs:
--------------------------------------------------------------------------------
1 | use oxc_allocator::Allocator;
2 | use oxc_ast::ast::*;
3 | use oxc_ast::{visit::walk_mut, AstBuilder, VisitMut};
4 |
5 | use rustc_hash::FxHashMap;
6 |
7 | #[derive(Debug, Default, Clone)]
8 | pub struct Function {
9 | pub offset: usize,
10 | pub list: Vec,
11 | }
12 |
13 | #[derive(Debug)]
14 | pub struct PendingFunction {
15 | pub name: String,
16 | pub offset: usize,
17 | }
18 |
19 | #[derive(Debug)]
20 | pub struct Values {
21 | pub objects: FxHashMap>,
22 | pub ints: FxHashMap,
23 |
24 | pub function: Function,
25 | pub function_name: String,
26 | }
27 |
28 | pub struct FunctionVisitor<'a> {
29 | ast: AstBuilder<'a>,
30 |
31 | pub functions: FxHashMap,
32 | pending_functions: FxHashMap,
33 | anon_function_counter: usize,
34 | lists: FxHashMap>,
35 | }
36 |
37 | impl<'a> FunctionVisitor<'a> {
38 | pub fn new(allocator: &'a Allocator) -> Self {
39 | Self {
40 | ast: AstBuilder::new(allocator),
41 | functions: FxHashMap::default(),
42 | pending_functions: FxHashMap::default(),
43 | anon_function_counter: 0,
44 | lists: FxHashMap::default(),
45 | }
46 | }
47 | }
48 |
49 | impl<'a> VisitMut<'a> for FunctionVisitor<'a> {
50 | fn visit_function(&mut self, it: &mut oxc_ast::ast::Function<'a>, _: oxc_semantic::ScopeFlags) {
51 | let name = if let Some(id) = &it.id {
52 | id.name.to_string()
53 | } else {
54 | // Anonymous function handling
55 | let anon_name = format!("anon_function_{}", self.anon_function_counter);
56 | self.anon_function_counter += 1;
57 | anon_name
58 | };
59 |
60 | if let Some(body) = &mut it.body {
61 | let mut func_name = "";
62 |
63 | let mut indices_to_remove = Vec::new();
64 | let mut i = 0;
65 | for stmt in &body.statements {
66 | match stmt {
67 | Statement::VariableDeclaration(var_decl) => {
68 | for decl in &var_decl.declarations {
69 | if let Some(init) = &decl.init {
70 | match init {
71 | Expression::ArrayExpression(array) => {
72 | let mut list = Vec::new();
73 | for elem in &array.elements {
74 | if let ArrayExpressionElement::StringLiteral(lit) = elem
75 | {
76 | list.push(lit.value.to_string());
77 | }
78 | }
79 |
80 | if list.len() > 0 {
81 | self.lists.insert(name.to_string(), list.clone());
82 | }
83 |
84 | if let Some(func) =
85 | self.pending_functions.get(name.as_str())
86 | {
87 | self.functions.insert(
88 | func.name.to_string(),
89 | Function {
90 | offset: func.offset,
91 | list,
92 | },
93 | );
94 | }
95 |
96 | indices_to_remove.push(i);
97 | }
98 |
99 | Expression::CallExpression(call) => {
100 | if let Expression::Identifier(ident) = &call.callee {
101 | func_name = ident.name.as_str();
102 | }
103 | }
104 |
105 | _ => {}
106 | }
107 | }
108 | }
109 | }
110 |
111 | Statement::ReturnStatement(retrn) => {
112 | if let Some(arg) = &retrn.argument {
113 | if let Expression::CallExpression(call) = arg {
114 | if let Expression::ParenthesizedExpression(parenth) = &call.callee {
115 | if let Expression::AssignmentExpression(assign) =
116 | &parenth.expression
117 | {
118 | if let Expression::FunctionExpression(func) = &assign.right
119 | {
120 | if let Some(body) = &mut &func.body {
121 | for stmt in &body.statements {
122 | if let Statement::ReturnStatement(retrn) = stmt
123 | {
124 | if let Some(arg) = &retrn.argument {
125 | if let Expression::ComputedMemberExpression(computed) = arg {
126 | if let Expression::AssignmentExpression(assign) =
127 | &computed.expression
128 | {
129 | if let Expression::NumericLiteral(lit) = &assign.right {
130 | if let Some(list) = self.lists.get(func_name) {
131 | self.functions.insert(name.to_string(), Function{
132 | offset: lit.value as usize,
133 | list: list.to_vec(),
134 | });
135 | } else {
136 | self.pending_functions.insert(func_name.to_string(), PendingFunction{
137 | name: name.to_string(),
138 | offset: lit.value as usize,
139 | });
140 | }
141 |
142 | indices_to_remove.push(i);
143 | }
144 | }
145 | }
146 | }
147 | }
148 | }
149 | }
150 | }
151 | }
152 | }
153 | }
154 | }
155 | }
156 |
157 | _ => {}
158 | }
159 |
160 | i += 1;
161 | }
162 |
163 | for index in indices_to_remove.iter().rev() {
164 | body.statements.remove(*index);
165 | }
166 | }
167 |
168 | walk_mut::walk_function(self, it, oxc_semantic::ScopeFlags::all());
169 | }
170 | }
171 |
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/src/transform/visit/mod.rs:
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1 | pub mod functions;
2 | pub mod strings;
3 |
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/src/transform/visit/strings.rs:
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1 | use oxc_allocator::Allocator;
2 | use oxc_ast::ast::*;
3 | use oxc_ast::{visit::walk_mut, AstBuilder, VisitMut};
4 | use oxc_span::SPAN;
5 |
6 | use rustc_hash::FxHashMap;
7 |
8 | use super::functions::{Function, Values};
9 |
10 | pub struct StringsVisitor<'a> {
11 | ast: AstBuilder<'a>,
12 |
13 | functions: FxHashMap,
14 | anon_function_counter: usize,
15 | proxies: FxHashMap,
16 |
17 | values: FxHashMap,
18 | current_function: Option,
19 | }
20 |
21 | impl<'a> StringsVisitor<'a> {
22 | pub fn new(allocator: &'a Allocator, functions: FxHashMap) -> Self {
23 | Self {
24 | ast: AstBuilder::new(allocator),
25 | functions,
26 | anon_function_counter: 0,
27 | proxies: FxHashMap::default(),
28 | values: FxHashMap::default(),
29 | current_function: None,
30 | }
31 | }
32 | }
33 |
34 | impl<'a> VisitMut<'a> for StringsVisitor<'a> {
35 | fn visit_function(&mut self, it: &mut oxc_ast::ast::Function<'a>, _: oxc_semantic::ScopeFlags) {
36 | let name = if let Some(id) = &it.id {
37 | id.name.to_string()
38 | } else {
39 | // Anonymous function handling
40 | let anon_name = format!("anon_function_{}", self.anon_function_counter);
41 | self.anon_function_counter += 1;
42 | anon_name
43 | };
44 |
45 | let previous_function = self.current_function.take();
46 | self.current_function = Some(name.to_string());
47 |
48 | if let Some(body) = &mut it.body {
49 | let mut ints: FxHashMap = FxHashMap::default();
50 | let mut objects: FxHashMap> = FxHashMap::default();
51 |
52 | let mut function = Function::default();
53 | let mut function_name = String::new();
54 |
55 | let mut indices_to_remove = Vec::new();
56 | let mut i = 0;
57 | for stmt in &body.statements {
58 | let mut remove = true;
59 |
60 | if let Statement::VariableDeclaration(var_decl) = stmt {
61 | for decl in var_decl.declarations.iter() {
62 | if let Some(init) = &decl.init {
63 | match init {
64 | Expression::NumericLiteral(lit) => {
65 | if let BindingPatternKind::BindingIdentifier(binding_ident) =
66 | &decl.id.kind
67 | {
68 | ints.insert(
69 | binding_ident.name.to_string(),
70 | lit.value as i64,
71 | );
72 | }
73 | }
74 | Expression::ObjectExpression(obj) => {
75 | let mut properties: FxHashMap =
76 | FxHashMap::default();
77 |
78 | for prop in &obj.properties {
79 | if let ObjectPropertyKind::ObjectProperty(obj_prop) = prop {
80 | if let PropertyKey::StaticIdentifier(ident) =
81 | &obj_prop.key
82 | {
83 | if let Expression::NumericLiteral(lit) =
84 | &obj_prop.value
85 | {
86 | properties.insert(
87 | ident.name.to_string(),
88 | lit.value as i64,
89 | );
90 | }
91 | }
92 | }
93 | }
94 |
95 | if !properties.is_empty() {
96 | if let BindingPatternKind::BindingIdentifier(
97 | binding_ident,
98 | ) = &decl.id.kind
99 | {
100 | objects
101 | .insert(binding_ident.name.to_string(), properties);
102 | }
103 | }
104 | }
105 | Expression::Identifier(ident) => {
106 | if let BindingPatternKind::BindingIdentifier(binding_ident) =
107 | &decl.id.kind
108 | {
109 | function_name = binding_ident.name.to_string();
110 | }
111 |
112 | if let Some(proxy) = self.proxies.get(ident.name.as_str()) {
113 | if let Some(func) = self.functions.get(proxy) {
114 | function = func.clone();
115 | }
116 | } else if let Some(func) =
117 | self.functions.get(ident.name.as_str())
118 | {
119 | function = func.clone();
120 | }
121 | }
122 | _ => {
123 | remove = false;
124 | }
125 | }
126 | }
127 | }
128 |
129 | if remove {
130 | indices_to_remove.push(i);
131 | }
132 | }
133 |
134 | i += 1;
135 | }
136 |
137 | if !ints.is_empty() || !objects.is_empty() {
138 | self.values.insert(
139 | name.to_string(),
140 | Values {
141 | objects,
142 | ints,
143 | function,
144 | function_name,
145 | },
146 | );
147 | }
148 |
149 | for i in indices_to_remove.iter().rev() {
150 | //body.statements.remove(*i);
151 | }
152 | }
153 |
154 | walk_mut::walk_function(self, it, oxc_semantic::ScopeFlags::all());
155 | self.current_function = previous_function;
156 | }
157 |
158 | fn visit_expression(&mut self, it: &mut Expression<'a>) {
159 | match it {
160 | Expression::CallExpression(call_expr) => {
161 | if let Expression::Identifier(ident) = &call_expr.callee {
162 | if let Some(current_fn) = &self.current_function {
163 | if let Some(values) = self.values.get(current_fn) {
164 | for arg in &call_expr.arguments {
165 | match arg {
166 | Argument::Identifier(ident_2) => {
167 | if let Some(value) = values.ints.get(ident_2.name.as_str())
168 | {
169 | let index = *value as usize - values.function.offset;
170 | if index < values.function.list.len() {
171 | *it = Expression::StringLiteral(self.ast.alloc(
172 | StringLiteral {
173 | span: SPAN,
174 | value: self.ast.atom(
175 | values.function.list[index].as_str(),
176 | ),
177 | },
178 | ));
179 |
180 | return;
181 | }
182 | }
183 | }
184 |
185 | Argument::NumericLiteral(lit) => {
186 | if ident.name == values.function_name {
187 | let index = lit.value as usize - values.function.offset;
188 | if index < values.function.list.len() {
189 | *it = Expression::StringLiteral(self.ast.alloc(
190 | StringLiteral {
191 | span: SPAN,
192 | value: self.ast.atom(
193 | values.function.list[index].as_str(),
194 | ),
195 | },
196 | ));
197 |
198 | return;
199 | }
200 | }
201 | }
202 |
203 | Argument::StaticMemberExpression(member_expr) => {
204 | if let Expression::Identifier(ident_2) = &member_expr.object
205 | {
206 | if let Some(value) =
207 | values.objects.get(ident_2.name.as_str())
208 | {
209 | if let Some(int) =
210 | value.get(member_expr.property.name.as_str())
211 | {
212 | let index =
213 | *int as usize - values.function.offset;
214 | if index < values.function.list.len() {
215 | *it = Expression::StringLiteral(
216 | self.ast.alloc(StringLiteral {
217 | span: SPAN,
218 | value: self.ast.atom(
219 | values.function.list[index]
220 | .as_str(),
221 | ),
222 | }),
223 | );
224 |
225 | return;
226 | }
227 | }
228 | }
229 | }
230 | }
231 |
232 | _ => {}
233 | }
234 | }
235 | }
236 | }
237 | }
238 | }
239 |
240 | _ => {}
241 | }
242 |
243 | walk_mut::walk_expression(self, it);
244 | }
245 |
246 | fn visit_variable_declarator(&mut self, it: &mut VariableDeclarator<'a>) {
247 | if let Some(init) = &it.init {
248 | match init {
249 | Expression::Identifier(ident) => {
250 | if let BindingPatternKind::BindingIdentifier(binding_ident) = &it.id.kind {
251 | if ident.name.len() == 2 && binding_ident.name.len() == 2 {
252 | self.proxies
253 | .insert(binding_ident.name.to_string(), ident.name.to_string());
254 |
255 | it.init = None;
256 | }
257 | }
258 | }
259 |
260 | _ => {}
261 | }
262 | }
263 |
264 | walk_mut::walk_variable_declarator(self, it);
265 | }
266 | }
267 |
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