libmwemu 0.24.5

x86 32/64bits and system internals emulator, for securely emulating malware and other stuff.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182

use std::sync::atomic::Ordering;

use crate::maps::mem64::Permission;
use crate::syscall::windows::syscall64;
use crate::tests::helpers;
use crate::windows::constants::*;
use crate::*;

fn setup_emu64_syscall() -> emu::Emu {
    let mut emu = emu64();
    emu.maps
        .create_map("stack", 0x100000, 0x20000, Permission::READ_WRITE)
        .expect("create stack map");
    emu.regs_mut().rsp = 0x101000;
    emu
}

#[test]
fn nt_query_virtual_memory_success_writes_output() {
    helpers::setup();
    let mut emu = setup_emu64_syscall();
    emu.maps
        .create_map("target", 0x400000, 0x3000, Permission::READ_WRITE_EXECUTE)
        .expect("create target map");
    emu.maps
        .create_map("io", 0x500000, 0x2000, Permission::READ_WRITE)
        .expect("create io map");

    emu.regs_mut().rax = WIN64_NTQUERYVIRTUALMEMORY;
    emu.regs_mut().rcx = !0; // current process
    emu.regs_mut().rdx = 0x400100;
    emu.regs_mut().r8 = MEMORY_INFORMATION_CLASS_MEMORY_BASIC_INFORMATION;
    emu.regs_mut().r9 = 0x500100; // MEMORY_BASIC_INFORMATION output
    emu.maps.write_qword(
        emu.regs().rsp + 0x28,
        crate::windows::structures::MemoryBasicInformation64::SIZE,
    ); // out length
    emu.maps.write_qword(emu.regs().rsp + 0x30, 0x500080); // return length ptr

    syscall64::gateway(&mut emu);

    assert_eq!(emu.regs().rax, STATUS_SUCCESS);
    assert_eq!(
        emu.maps.read_qword(0x500080).unwrap_or(0),
        crate::windows::structures::MemoryBasicInformation64::SIZE
    );
    assert_eq!(emu.maps.read_qword(0x500100).unwrap_or(0), 0x400000);
}

#[test]
fn nt_allocate_virtual_memory_success_maps_region() {
    helpers::setup();
    let mut emu = setup_emu64_syscall();
    emu.maps
        .create_map("io", 0x520000, 0x2000, Permission::READ_WRITE)
        .expect("create io map");

    emu.maps.write_qword(0x520000, 0); // base address in/out
    emu.maps.write_qword(0x520008, 0x2000); // region size in/out

    emu.regs_mut().rax = WIN64_NTALLOCATEVIRTUALMEMORY;
    emu.regs_mut().rcx = !0;
    emu.regs_mut().rdx = 0x520000; // base ptr
    emu.regs_mut().r8 = 0; // zero bits
    emu.regs_mut().r9 = 0x520008; // region size ptr
    emu.maps
        .write_dword(emu.regs().rsp + 0x28, MEM_COMMIT | MEM_RESERVE);
    emu.maps.write_dword(emu.regs().rsp + 0x30, PAGE_READWRITE);

    syscall64::gateway(&mut emu);

    let base = emu.maps.read_qword(0x520000).unwrap_or(0);
    assert_eq!(emu.regs().rax, STATUS_SUCCESS);
    assert!(base != 0);
    assert!(emu.maps.is_mapped(base));
}

#[test]
fn nt_write_then_read_virtual_memory_roundtrip() {
    helpers::setup();
    let mut emu = setup_emu64_syscall();
    emu.maps
        .create_map("src", 0x530000, 0x1000, Permission::READ_WRITE)
        .expect("create src");
    emu.maps
        .create_map("dst", 0x540000, 0x1000, Permission::READ_WRITE)
        .expect("create dst");
    emu.maps
        .create_map("out", 0x550000, 0x1000, Permission::READ_WRITE)
        .expect("create out");

    let payload = b"mwemu-nt-rw";
    assert!(emu.maps.write_bytes(0x530100, payload));

    emu.regs_mut().rax = WIN64_NTWRITEVIRTUALMEMORY;
    emu.regs_mut().rcx = !0;
    emu.regs_mut().rdx = 0x540100; // target base
    emu.regs_mut().r8 = 0x530100; // source buffer
    emu.regs_mut().r9 = payload.len() as u64;
    emu.maps.write_qword(emu.regs().rsp + 0x28, 0x550080); // bytes written ptr
    syscall64::gateway(&mut emu);
    assert_eq!(emu.regs().rax, STATUS_SUCCESS);
    assert_eq!(
        emu.maps.read_qword(0x550080).unwrap_or(0),
        payload.len() as u64
    );

    emu.regs_mut().rax = WIN64_NTREADVIRTUALMEMORY;
    emu.regs_mut().rcx = !0;
    emu.regs_mut().rdx = 0x540100; // source in target region
    emu.regs_mut().r8 = 0x550100; // destination buffer
    emu.regs_mut().r9 = payload.len() as u64;
    emu.maps.write_qword(emu.regs().rsp + 0x28, 0x550088); // bytes read ptr
    syscall64::gateway(&mut emu);
    assert_eq!(emu.regs().rax, STATUS_SUCCESS);
    assert_eq!(
        emu.maps.read_qword(0x550088).unwrap_or(0),
        payload.len() as u64
    );
    assert_eq!(emu.maps.read_bytes(0x550100, payload.len()), payload);
}

#[test]
fn nt_query_information_process_basic_and_cookie() {
    helpers::setup();
    let mut emu = setup_emu64_syscall();
    emu.maps
        .create_map("peb", 0x70000000, 0x1000, Permission::READ_WRITE)
        .expect("create peb");
    emu.maps
        .create_map("io", 0x560000, 0x2000, Permission::READ_WRITE)
        .expect("create io");

    // ProcessBasicInformation
    emu.regs_mut().rax = WIN64_NTQUERYINFORMATIONPROCESS;
    emu.regs_mut().rcx = !0;
    emu.regs_mut().rdx = PROCESS_INFORMATION_CLASS_PROCESS_BASIC_INFORMATION;
    emu.regs_mut().r8 = 0x560100;
    emu.regs_mut().r9 = 0x30;
    emu.maps.write_qword(emu.regs().rsp + 0x28, 0x560080); // return length ptr
    syscall64::gateway(&mut emu);
    assert_eq!(emu.regs().rax, STATUS_SUCCESS);
    assert_eq!(emu.maps.read_qword(0x560080).unwrap_or(0), 0x30);
    assert_eq!(emu.maps.read_qword(0x560108).unwrap_or(0), 0x70000000); // PebBaseAddress

    // ProcessCookie
    emu.regs_mut().rax = WIN64_NTQUERYINFORMATIONPROCESS;
    emu.regs_mut().rcx = !0;
    emu.regs_mut().rdx = PROCESS_INFORMATION_CLASS_PROCESS_COOKIE;
    emu.regs_mut().r8 = 0x560200;
    emu.regs_mut().r9 = 4;
    emu.maps.write_qword(emu.regs().rsp + 0x28, 0);
    syscall64::gateway(&mut emu);
    assert_eq!(emu.regs().rax, STATUS_SUCCESS);
    assert_eq!(emu.maps.read_dword(0x560200).unwrap_or(1), 0x01234567);
}

#[test]
fn nt_open_and_terminate_process_behavior() {
    helpers::setup();
    let mut emu = setup_emu64_syscall();
    emu.maps
        .create_map("io", 0x570000, 0x1000, Permission::READ_WRITE)
        .expect("create io");

    emu.regs_mut().rax = WIN64_NTOPENPROCESS;
    emu.regs_mut().rcx = 0x570080; // process handle out
    emu.regs_mut().rdx = 0;
    emu.regs_mut().r8 = 0;
    emu.regs_mut().r9 = 0;
    syscall64::gateway(&mut emu);
    assert_eq!(emu.regs().rax, STATUS_SUCCESS);
    assert_eq!(emu.maps.read_qword(0x570080).unwrap_or(0), 0x4);

    emu.is_running.store(1, Ordering::Relaxed);
    emu.regs_mut().rax = WIN64_NTTERMINATEPROCESS;
    emu.regs_mut().rcx = !0;
    emu.regs_mut().rdx = 0;
    syscall64::gateway(&mut emu);
    assert_eq!(emu.regs().rax, STATUS_SUCCESS);
    assert_eq!(emu.is_running.load(Ordering::Relaxed), 0);
}