Function at 0x140089c40
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 + 0x10], rbx
mov qword [rsp + 0x18], rsi
mov qword [rsp + 0x20], rdi
push rbp
push r12
push r13
push r14
push r15
lea rbp, [rsp - 0x37]
sub rsp, 0xb0
mov rax, qword [0x1401c6780]
xor rax, rsp
mov qword [rbp + 0x2f], rax
mov qword [rbp - 0x41], rdx
mov rbx, rcx
mov qword [rbp - 0x49], rcx
xor edi, edi
mov r15d, edi
mov dword [rbp - 0x19], edi
lea r9, [rbp - 0x19]
xor r8d, r8d
xor edx, edx
lea ecx, [rdi + 0xb]
call qword [sym.imp.ntdll.dll_NtQuerySystemInformation]
cmp eax, 0xc0000004
jne 0x140089ce6
nop
xor edx, edx
mov r8d, 0x8000
mov rcx, r15
call qword [sym.imp.KERNEL32.dll_VirtualFree]
mov edx, dword [rbp - 0x19]
xor ecx, ecx
lea r9d, [rcx + 4]
mov r8d, 0x3000
call qword [sym.imp.KERNEL32.dll_VirtualAlloc]
mov r15, rax
lea r9, [rbp - 0x19]
mov r8d, dword [rbp - 0x19]
mov rdx, rax
mov ecx, listen
call qword [sym.imp.ntdll.dll_NtQuerySystemInformation]
cmp eax, 0xc0000004
je 0x140089ca0
test eax, eax
js 0x14008a00f
mov r12d, edi
cmp dword [r15], edi
jbe 0x14008a00f
nop word [rax + rax]
mov eax, r12d
imul rcx, rax, 0x128
lea r13, [rcx + r15]
movzx edx, word [r13 + 0x2e]
add rdx, 0x30
add rdx, rcx
add rdx, r15
xorps xmm0, xmm0
movups xmmword [rbp + 0xf], xmm0
mov qword [rbp + 0x1f], rdi
mov qword [rbp + 0x27], rdi
mov r8, 0xffffffffffffffff
inc r8
cmp byte [rdx + r8], 0
jne 0x140089d33
lea rcx, [rbp + 0xf]
call fcn.140003610
nop
lea rcx, [rbp + 0xf]
cmp qword [rbp + 0x27], 0xf
cmova rcx, qword [rbp + 0xf]
mov rdx, rbx
call qword [sym.imp.api_ms_win_crt_string_l1_1_0.dll__stricmp]
test eax, eax
jne 0x140089fc8
lea rdx, [r13 + 0x30]
xorps xmm0, xmm0
movups xmmword [rbp - 0x11], xmm0
mov qword [rbp - 1], rdi
mov qword [rbp + 7], rdi
mov r8, 0xffffffffffffffff
inc r8
cmp byte [rdx + r8], 0
jne 0x140089d80
lea rcx, [rbp - 0x11]
call fcn.140003610
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 - 0x39], xmm0
mov qword [rbp - 0x29], rdi
mov qword [rbp - 0x21], rdi
mov r8, 0xffffffffffffffff
nop word [rax + rax]
inc r8
cmp byte [rax + r8], 0
jne 0x140089dc0
mov rdx, rax
lea rcx, [rbp - 0x39]
call fcn.140003610
nop
mov r8d, 1
lea rdx, [0x1401248a8]
lea rcx, [rbp - 0x39]
call fcn.140002e80
mov rsi, rax
lea r14, [rbp - 0x11]
cmp qword [rbp + 7], 0xf
cmova r14, qword [rbp - 0x11]
mov rax, qword [rbp - 1]
cmp rax, 0xc
jb 0x140089e6e
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 0x140089e6c
nop dword [rax + rax]
mov r8d, recv
lea rdx, str.SystemRoot_
mov rcx, rbx
call sub.VCRUNTIME140.dll_memcmp
test eax, eax
je 0x14008a04f
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 0x140089e30
xor edi, edi
mov rbx, 0xffffffffffffffff
mov rax, qword [rsi + 0x10]
cmp qword [rsi + 0x18], 0xf
jbe 0x140089e83
mov rsi, qword [rsi]
mov qword [rsp + 0x20], rax
mov r9, rsi
mov rdx, rbx
lea rcx, [rbp - 0x11]
call fcn.140050610
nop
mov rdx, qword [rbp - 0x21]
cmp rdx, 0xf
jbe 0x140089ed3
inc rdx
mov rcx, qword [rbp - 0x39]
mov rax, rcx
cmp rdx, 0x1000
jb 0x140089ece
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
ja 0x14008a059
call fcn.1400f3d24
lea rcx, [rbp - 0x11]
cmp qword [rbp + 7], 0xf
cmova rcx, qword [rbp - 0x11]
xor edx, edx
lea r8d, [rdx + 1]
call qword [sym.imp.KERNEL32.dll_LoadLibraryExA]
mov r11, rax
mov eax, 0x5a4d
cmp word [r11], ax
jne 0x14008a083
movsxd rcx, dword [r11 + 0x3c]
cmp dword [rcx + r11], 0x4550
jne 0x14008a083
mov edx, dword [rcx + r11 + 0x88]
test edx, edx
je 0x14008a083
mov ebx, dword [rdx + r11 + 0x1c]
lea rdi, [r11 + rbx]
mov r9d, dword [rdx + r11 + 0x20]
add r9, r11
mov esi, dword [rdx + r11 + 0x24]
add rsi, r11
xor r10d, r10d
test ebx, ebx
je 0x140089f87
nop dword [rax]
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 0x140089f73
inc rax
test ecx, ecx
jne 0x140089f60
test edx, edx
je 0x14008a060
inc r10d
add r9, 4
cmp r10d, ebx
jb 0x140089f50
mov rdx, qword [rbp + 7]
cmp rdx, 0xf
jbe 0x140089fc2
inc rdx
mov rcx, qword [rbp - 0x11]
mov rax, rcx
cmp rdx, 0x1000
jb 0x140089fbd
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
ja 0x14008a0b8
call fcn.1400f3d24
xor edi, edi
mov rbx, qword [rbp - 0x49]
mov rdx, qword [rbp + 0x27]
cmp rdx, 0xf
jbe 0x14008a003
inc rdx
mov rcx, qword [rbp + 0xf]
mov rax, rcx
cmp rdx, 0x1000
jb 0x140089ffe
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
ja 0x14008a11a
call fcn.1400f3d24
inc r12d
cmp r12d, dword [r15]
jb 0x140089d00
xor edx, edx
mov r8d, 0x8000
mov rcx, r15
call qword [sym.imp.KERNEL32.dll_VirtualFree]
xor eax, eax
mov rcx, qword [rbp + 0x2f]
xor rcx, rsp
call fcn.1400f3cc0
lea r11, [rsp + 0xb0]
mov rbx, qword [r11 + 0x38]
mov rsi, qword [r11 + 0x40]
mov rdi, qword [r11 + 0x48]
mov rsp, r11
pop r15
pop r14
pop r13
pop r12
pop rbp
ret
sub rbx, r14
xor edi, edi
jmp 0x140089e75
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 ebx, dword [rdi + rcx*4]
add rbx, qword [r13 + 0x18]
xor edx, edx
mov r8d, 0x8000
mov rcx, r15
call qword [sym.imp.KERNEL32.dll_VirtualFree]
xor edi, edi
jmp 0x14008a086
mov rbx, rdi
mov rdx, qword [rbp + 7]
cmp rdx, 0xf
jbe 0x14008a0c4
inc rdx
mov rcx, qword [rbp - 0x11]
mov rax, rcx
cmp rdx, 0x1000
jb 0x14008a0bf
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
jbe 0x14008a0bf
call qword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
int3
call fcn.1400f3d24
mov qword [rbp - 1], rdi
mov qword [rbp + 7], reloc.WS2_32.dll_ntohs
mov byte [rbp - 0x11], 0
mov rdx, qword [rbp + 0x27]
cmp rdx, 0xf
jbe 0x14008a112
inc rdx
mov rcx, qword [rbp + 0xf]
mov rax, rcx
cmp rdx, 0x1000
jb 0x14008a10d
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
jbe 0x14008a10d
call qword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
int3
call fcn.1400f3d24
mov rax, rbx
jmp 0x14008a022
call qword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
int3
mov rcx, qword [rdx]
mov rdx, qword [r8]
jmp 0x140089c40