Function at 0x1400783f0
Capabilities:
Get system information on windows
Make suspicious ntquerysysteminformation call
Parse pe header
Query environment variable
Resolve function by parsing pe exports

Disassembly:
mov qword [rsp + 8], rbx
mov qword [rsp + 0x10], rsi
mov qword [rsp + 0x18], rdi
push rbp
push r12
push r13
push r14
push r15
lea rbp, [rsp - 0x37]
sub rsp, 0xb0
mov rax, qword [0x14027b090]
xor rax, rsp
mov qword [rbp + 0x2f], rax
mov byte [rbp - 0x49], r8b
mov qword [rbp - 0x41], rdx
xor r15d, r15d
mov r12d, r15d
mov dword [rbp - 0x45], r15d
lea r9, [rbp - 0x45]
xor r8d, r8d
xor edx, edx
lea ecx, [rdx + 0xb]
call qword [sym.imp.ntdll.dll_NtQuerySystemInformation]
cmp eax, 0xc0000004
jne 0x140078496
nop dword [rax]
xor edx, edx
mov r8d, 0x8000
mov rcx, r12
call qword [sym.imp.KERNEL32.dll_VirtualFree]
mov edx, dword [rbp - 0x45]
xor ecx, ecx
lea r9d, [rcx + 4]
mov r8d, 0x3000
call qword [sym.imp.KERNEL32.dll_VirtualAlloc]
mov r12, rax
lea r9, [rbp - 0x45]
mov r8d, dword [rbp - 0x45]
mov rdx, rax
mov ecx, listen
call qword [sym.imp.ntdll.dll_NtQuerySystemInformation]
cmp eax, 0xc0000004
je 0x140078450
test eax, eax
js 0x1400787bf
mov r13d, r15d
cmp dword [r12], r15d
jbe 0x1400787bf
mov edi, 0x5a4d
mov eax, r13d
imul rcx, rax, 0x128
lea rbx, [rcx + r12]
mov qword [rbp - 0x39], rbx
movzx edx, word [rbx + 0x2e]
add rdx, 0x30
add rdx, rcx
add rdx, r12
xorps xmm0, xmm0
movups xmmword [rbp - 0x11], xmm0
mov qword [rbp - 1], r15
mov qword [rbp + 7], r15
mov r8, 0xffffffffffffffff
inc r8
cmp byte [rdx + r8], 0
jne 0x1400784e6
lea rcx, [rbp - 0x11]
call fcn.140004380
nop
lea rcx, [rbp - 0x11]
cmp qword [rbp + 7], 0x10
cmovae rcx, qword [rbp - 0x11]
lea rdx, str.ntoskrnl.exe
call qword [sym.imp.api_ms_win_crt_string_l1_1_0.dll__stricmp]
test eax, eax
jne 0x140078777
lea rdx, [rbx + 0x30]
xorps xmm0, xmm0
movups xmmword [rbp - 0x31], xmm0
mov qword [rbp - 0x21], r15
mov qword [rbp - 0x19], r15
mov r8, 0xffffffffffffffff
nop word [rax + rax]
inc r8
cmp byte [rdx + r8], 0
jne 0x140078540
lea rcx, [rbp - 0x31]
call fcn.140004380
nop
lea rcx, str.SYSTEMROOT
call qword [sym.imp.api_ms_win_crt_environment_l1_1_0.dll_getenv]
xorps xmm0, xmm0
movups xmmword [rbp + 0xf], xmm0
mov qword [rbp + 0x1f], r15
mov qword [rbp + 0x27], r15
mov r8, 0xffffffffffffffff
nop word [rax + rax]
inc r8
cmp byte [rax + r8], 0
jne 0x140078580
mov rdx, rax
lea rcx, [rbp + 0xf]
call fcn.140004380
nop
mov r8d, 1
lea rdx, [0x140115d34]
lea rcx, [rbp + 0xf]
call fcn.14000b470
mov rsi, rax
lea r14, [rbp - 0x31]
cmp qword [rbp - 0x19], 0x10
cmovae r14, qword [rbp - 0x31]
mov rax, qword [rbp - 0x21]
cmp rax, 0xc
jb 0x140078631
lea rdi, [rax + r14]
lea r8, [rdi - 0xb]
sub r8, r14
mov edx, 0x5c
mov rcx, r14
call sub.VCRUNTIME140.dll_memchr
mov rbx, rax
test rax, rax
je 0x14007862c
nop dword [rax + rax]
mov r8d, listen
lea rdx, str.SystemRoot_
mov rcx, rbx
call sub.VCRUNTIME140.dll_memcmp
test eax, eax
je 0x1400787ff
inc rbx
lea r8, [rdi - 0xb]
sub r8, rbx
mov edx, 0x5c
mov rcx, rbx
call sub.VCRUNTIME140.dll_memchr
mov rbx, rax
test rax, rax
jne 0x1400785f0
mov edi, 0x5a4d
mov rbx, 0xffffffffffffffff
mov rax, qword [rsi + 0x10]
cmp qword [rsi + 0x18], 0x10
jb 0x140078646
mov rsi, qword [rsi]
mov qword [rsp + 0x20], rax
mov r9, rsi
mov rdx, rbx
lea rcx, [rbp - 0x31]
call fcn.14000bfe0
nop
mov rdx, qword [rbp + 0x27]
cmp rdx, 0x10
jb 0x140078696
inc rdx
mov rcx, qword [rbp + 0xf]
mov rax, rcx
cmp rdx, 0x1000
jb 0x140078691
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
ja 0x14007880c
call fcn.140100ea4
lea rcx, [rbp - 0x31]
cmp qword [rbp - 0x19], 0x10
cmovae rcx, qword [rbp - 0x31]
xor edx, edx
lea r8d, [rdx + 1]
call qword [sym.imp.KERNEL32.dll_LoadLibraryExA]
mov r11, rax
cmp word [rax], di
jne 0x14007883d
movsxd rcx, dword [rax + 0x3c]
cmp dword [rcx + rax], 0x4550
jne 0x14007883d
mov edx, dword [rcx + rax + 0x88]
test edx, edx
je 0x14007883d
mov ebx, dword [rdx + rax + 0x1c]
lea rdi, [rax + rbx]
mov r9d, dword [rdx + rax + 0x20]
add r9, rax
mov esi, dword [rdx + rax + 0x24]
add rsi, rax
mov r10d, r15d
test ebx, ebx
je 0x140078737
nop word [rax + rax]
mov r8d, dword [r9]
add r8, r11
mov rax, qword [rbp - 0x41]
sub r8, rax
nop dword [rax]
movzx edx, byte [rax]
movzx ecx, byte [rax + r8]
sub edx, ecx
jne 0x140078723
inc rax
test ecx, ecx
jne 0x140078710
test edx, edx
je 0x140078813
inc r10d
add r9, 4
cmp r10d, ebx
jb 0x140078700
mov rdx, qword [rbp - 0x19]
cmp rdx, 0x10
jb 0x140078772
inc rdx
mov rcx, qword [rbp - 0x31]
mov rax, rcx
cmp rdx, 0x1000
jb 0x14007876d
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
ja 0x140078880
call fcn.140100ea4
mov edi, 0x5a4d
mov rdx, qword [rbp + 7]
cmp rdx, 0x10
jb 0x1400787b2
inc rdx
mov rcx, qword [rbp - 0x11]
mov rax, rcx
cmp rdx, 0x1000
jb 0x1400787ad
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
ja 0x140078894
call fcn.140100ea4
inc r13d
cmp r13d, dword [r12]
jb 0x1400784b0
xor edx, edx
mov r8d, 0x8000
mov rcx, r12
call qword [sym.imp.KERNEL32.dll_VirtualFree]
xor eax, eax
mov rcx, qword [rbp + 0x2f]
xor rcx, rsp
call fcn.140100e40
lea r11, [rsp + 0xb0]
mov rbx, qword [r11 + 0x30]
mov rsi, qword [r11 + 0x38]
mov rdi, qword [r11 + 0x40]
mov rsp, r11
pop r15
pop r14
pop r13
pop r12
pop rbp
ret
sub rbx, r14
mov edi, 0x5a4d
jmp 0x140078638
call qword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
int3
movsxd rax, r10d
movzx ecx, word [rsi + rax*2]
mov r15d, dword [rdi + rcx*4]
xor edx, edx
mov r8d, 0x8000
mov rcx, r12
cmp byte [rbp - 0x49], dl
jne 0x140078836
mov rax, qword [rbp - 0x39]
add r15, qword [rax + 0x18]
call qword [sym.imp.KERNEL32.dll_VirtualFree]
nop
lea rcx, [rbp - 0x31]
call fcn.1400042c0
nop
mov rdx, qword [rbp + 7]
cmp rdx, 0x10
jb 0x14007888c
inc rdx
mov rcx, qword [rbp - 0x11]
mov rax, rcx
cmp rdx, 0x1000
jb 0x140078887
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
jbe 0x140078887
call qword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
nop
call qword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
nop
call fcn.140100ea4
mov rax, r15
jmp 0x1400787d2
call qword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
int3