Function at 0x4387b0
Capabilities:
Check for time delay via queryperformancecounter
Get process image filename

Disassembly:
push ebp
mov ebp, esp
push ebx
push edi
push esi
and esp, 0xfffffff8
sub esp, 0x2b0
mov ebx, ecx
mov eax, dword [0x646040]
xor eax, ebp
mov dword [esp + 0x2a8], eax
xor eax, eax
dec eax
mov dword [esp + 0x3c], eax
mov dword [esp + 0x38], eax
mov ecx, dword [fcn.005608f0]
cmp ecx, 0x5531a0
mov dword [esp + 0x14], ebx
jne 0x43892b
xor eax, eax
lea esi, [esp + 0x68]
mov dword [esi + 4], eax
mov dword [esi], eax
push esi
call dword [sym.imp.KERNEL32.dll_QueryPerformanceCounter]
mov edi, dword [esi]
mov esi, dword [esi + 4]
mov eax, 0x7bd05af7
cmp edi, eax
mov eax, esi
mov ecx, 0x863
sbb eax, ecx
jge 0x439237
mov ecx, 0xf4240
mov eax, edi
mul ecx
imul ecx, esi, 0xf4240
add ecx, edx
push dword [0x64b6cc]
push dword [0x64b6c8]
push ecx
push eax
call fcn.005877d0
mov dword [esp + 0x38], eax
mov dword [esp + 0x3c], edx
pcmpeqd xmm0, xmm0
movdqu xmmword [ebx], xmm0
movdqu xmmword [ebx + 0x10], xmm0
movdqu xmmword [ebx + 0x20], xmm0
mov eax, ebx
xor ebx, ebx
mov byte [eax], bl
mov byte [eax + 0x18], bl
pxor xmm0, xmm0
movq qword [eax + 0x20], xmm0
mov dword [eax + 0x28], ebx
xor eax, eax
dec eax
mov dword [esp + 0x2c], eax
mov dword [esp + 0x30], eax
mov dword [esp + 0x34], eax
lea edi, [esp + 0x5c]
mov dword [edi], eax
mov dword [edi + 4], eax
mov dword [edi + 8], eax
lea esi, [esp + 0x68]
push 0x23c
push 0xff
push esi
call fcn.00568ad0
add esp, 0xc
mov ecx, esi
push ebx
mov ebx, esi
call fcn.004394f0
mov ecx, esi
push edi
call fcn.00439550
mov dword [esi], 0x6235e4
push dword [esi + 4]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov eax, dword [esi + 0x238]
mov ecx, eax
shr ecx, 0xe
mov edx, eax
shr edx, 0x13
mov edx, dword [edx*4 + 0x64e810]
bt edx, ecx
jb 0x439195
cmp dword [esp + 0x64], 0
je 0x4391c3
call dword [sym.imp.KERNEL32.dll_GetCurrentProcessId]
mov edi, eax
mov dword [esp + 0x68], ebx
mov dword [esp + 0x6c], ebx
mov dword [esp + 0x70], 0
mov ebx, dword [esp + 0x60]
xor eax, eax
lea edx, [esp + 0x5c]
cmp ebx, edx
je 0x4390fb
mov ecx, ebx
cmp dword [ecx + 0x10], edi
je 0x438940
mov ecx, dword [ecx + 4]
cmp ecx, edx
jne 0x43891a
jmp 0x4390fb
call dword [0x6401dc]
lea eax, [esp + 0x38]
push eax
call ecx
add esp, 4
jmp 0x438849
mov esi, dword [ecx + 0x20]
push 0xc
call fcn.00564055
add esp, 4
test eax, eax
je 0x4390cd
mov dword [eax + 8], esi
lea ecx, [esp + 0x68]
mov dword [eax + 4], ecx
mov dword [eax], ecx
mov dword [esp + 0x6c], eax
mov dword [esp + 0x68], eax
mov dword [esp + 0x70], 1
test esi, esi
je 0x4390f8
pxor xmm0, xmm0
movq qword [esp + 0x50], xmm0
mov dword [esp + 0x58], 0
lea eax, [esp + 0x5c]
jmp 0x438998
mov ebx, dword [ebx + 4]
cmp ebx, eax
je 0x4389b0
cmp dword [ebx + 0x10], esi
jne 0x438991
add ebx, 0x2c
je 0x4390c6
lea ecx, [esp + 0x50]
push ebx
call fcn.00424f70
movsx eax, byte [esp + 0x5b]
test eax, eax
jns 0x4389bd
mov eax, dword [esp + 0x54]
test eax, eax
je 0x43920b
lea ecx, [esp + 0x44]
xor eax, eax
dec eax
mov dword [ecx], eax
mov dword [ecx + 4], eax
mov dword [ecx + 8], eax
push ecx
call fcn.00439630
lea edx, [esp + 0x50]
movsx eax, byte [edx + 0xb]
test eax, eax
cmovs eax, dword [edx + 4]
mov ecx, dword [edx]
cmovns ecx, edx
test eax, eax
js 0x4390d4
sete dl
test ecx, ecx
setne dh
or dh, dl
je 0x4390db
push eax
push ecx
push 0xc
push str.explorer.exe
call fcn.00439360
add esp, 0x10
test eax, eax
je 0x439172
movsx eax, byte [esp + 0x4f]
test eax, eax
cmovs eax, dword [esp + 0x48]
mov ebx, dword [esp + 0x44]
lea ecx, [esp + 0x44]
cmovns ebx, ecx
test eax, eax
js 0x4390d4
sete dl
mov dword [esp], ebx
test ebx, ebx
setne dh
or dh, dl
je 0x4390db
movsx ebx, byte [esp + 0x5b]
test ebx, ebx
cmovs ebx, dword [esp + 0x54]
mov edx, dword [esp + 0x50]
lea ecx, [esp + 0x50]
cmovns edx, ecx
test ebx, ebx
js 0x4390d4
sete cl
test edx, edx
setne ch
or ch, cl
je 0x4390db
cmp ebx, eax
setne cl
mov dword [esp + 0xc], ecx
jne 0x438aac
mov dword [esp + 8], eax
test ebx, ebx
je 0x438aac
xor ebx, ebx
mov eax, dword [esp]
movzx ecx, word [edx + ebx*2]
cmp cx, word [eax + ebx*2]
setne cl
mov dword [esp + 0xc], ecx
je 0x4391a3
mov ebx, dword [esp + 0x60]
lea eax, [esp + 0x5c]
jmp 0x438ab9
mov ebx, dword [ebx + 4]
cmp ebx, eax
je 0x438bdd
cmp dword [ebx + 0x10], edi
je 0x438ab6
cmp dword [ebx + 0x20], esi
jne 0x438ab6
movsx edx, byte [esp + 0x5b]
test edx, edx
cmovs edx, dword [esp + 0x54]
mov ecx, dword [esp + 0x50]
lea eax, [esp + 0x50]
cmovns ecx, eax
test edx, edx
js 0x4390d4
sete al
mov dword [esp + 4], ecx
test ecx, ecx
setne cl
or cl, al
je 0x4390db
mov dword [esp + 8], edx
mov eax, ebx
add eax, 0x2c
je 0x4390f1
push eax
mov dword [esp + 4], eax
call fcn.00565872
add esp, 4
push dword [esp + 8]
push dword [esp + 8]
push eax
push dword [esp + 0xc]
call fcn.00439360
add esp, 0x10
test eax, eax
lea eax, [esp + 0x5c]
jne 0x438ab6
movsx ecx, byte [esp + 0x4f]
test ecx, ecx
cmovs ecx, dword [esp + 0x48]
mov edx, dword [esp + 0x44]
lea eax, [esp + 0x44]
cmovns edx, eax
test ecx, ecx
js 0x4390d4
mov dword [esp + 8], ecx
sete al
mov dword [esp + 4], edx
test edx, edx
setne cl
or cl, al
je 0x4390db
push dword [esp]
call fcn.00565872
add esp, 4
push dword [esp + 8]
push dword [esp + 8]
push eax
push dword [esp + 0xc]
call fcn.00439360
add esp, 0x10
test eax, eax
lea eax, [esp + 0x5c]
je 0x438ab6
mov eax, dword [ebx + 0x10]
mov dword [esp], eax
push 0xc
call fcn.00564055
add esp, 4
test eax, eax
je 0x4390cd
mov ecx, dword [esp]
mov dword [eax + 8], ecx
lea ecx, [esp + 0x68]
mov dword [eax + 4], ecx
mov ecx, dword [esp + 0x68]
mov dword [eax], ecx
mov dword [ecx + 4], eax
mov dword [esp + 0x68], eax
inc dword [esp + 0x70]
lea eax, [esp + 0x5c]
jmp 0x438ab6
lea eax, [esp + 0x2c]
mov dword [eax], eax
mov dword [eax + 4], eax
mov dword [eax + 8], 0
cmp dword [esp + 0x70], 0
je 0x438c28
mov ecx, dword [esp + 0x68]
mov edx, dword [esp + 0x6c]
mov esi, dword [ecx + 4]
mov edi, dword [edx]
mov dword [edi + 4], esi
mov edi, dword [edx]
mov dword [esi], edi
mov esi, dword [esp + 0x2c]
mov dword [esi + 4], edx
mov dword [edx], esi
mov dword [esp + 0x2c], ecx
mov dword [ecx + 4], eax
mov eax, dword [esp + 0x70]
add dword [esp + 0x34], eax
mov dword [esp + 0x70], 0
cmp byte [esp + 0x4f], 0
lea ebx, [esp + 0x68]
jns 0x438c3f
push dword [esp + 0x44]
call fcn.00564050
add esp, 4
cmp byte [esp + 0x5b], 0
jns 0x438c52
push dword [esp + 0x50]
call fcn.00564050
add esp, 4
mov eax, dword [esp + 0x70]
test eax, eax
je 0x438c94
mov ecx, dword [esp + 0x68]
mov eax, dword [esp + 0x6c]
mov ecx, dword [ecx + 4]
mov edx, dword [eax]
mov dword [edx + 4], ecx
mov edx, dword [eax]
mov dword [ecx], edx
mov dword [esp + 0x70], 0
cmp eax, ebx
je 0x438c94
test eax, eax
je 0x4390e2
mov esi, dword [eax + 4]
push eax
call fcn.00564050
add esp, 4
mov eax, esi
cmp esi, ebx
jne 0x438c7a
mov dword [esp + 8], 0
cmp dword [esp + 0x64], 0
je 0x438ce5
mov ecx, dword [esp + 0x5c]
mov eax, dword [esp + 0x60]
mov ecx, dword [ecx + 4]
mov edx, dword [eax]
mov dword [edx + 4], ecx
mov edx, dword [eax]
mov dword [ecx], edx
mov dword [esp + 0x64], 0
lea ecx, [esp + 0x5c]
cmp eax, ecx
je 0x438ce5
test eax, eax
je 0x4390e2
mov esi, dword [eax + 4]
push eax
call fcn.00564050
add esp, 4
mov eax, esi
lea ecx, [esp + 0x5c]
cmp esi, ecx
jne 0x438cc7
cmp dword [esp + 0x34], 0
je 0x4391b3
mov eax, dword [esp + 0x30]
push dword [eax + 8]
push 0
push 0x400
call dword [sym.imp.KERNEL32.dll_OpenProcess]
mov dword [esp], 0
mov esi, 0
test eax, eax
je 0x438d35
mov edi, eax
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov esi, eax
cmp edi, 0xffffffff
je 0x43907c
call fcn.004ffee0
push esi
call dword [sym.imp.KERNEL32.dll_SetLastError]
mov esi, edi
lea eax, [esi + 1]
cmp eax, 2
mov dword [esp + 4], esi
mov dword [esp + 0x10], eax
jb 0x43915e
push 0x20a
push 0xff
push ebx
call fcn.00568ad0
add esp, 0xc
push 0x104
push ebx
push esi
call sub.KERNEL32.dll_K32GetProcessImageFileNameW
test eax, eax
je 0x439162
xor eax, eax
dec eax
mov dword [esp + 0x5c], eax
mov dword [esp + 0x60], eax
mov dword [esp + 0x64], eax
push ebx
call fcn.00565872
add esp, 4
lea esi, [esp + 0x5c]
mov ecx, esi
push eax
push ebx
call fcn.00550a00
pxor xmm0, xmm0
lea edi, [esp + 0x50]
movq qword [edi], xmm0
mov dword [edi + 8], 0
push edi
push esi
call fcn.00439720
add esp, 8
movzx ecx, byte [edi + 0xb]
test al, al
je 0x439143
test cl, cl
mov esi, dword [esp + 0x54]
mov eax, ecx
cmovs eax, esi
test eax, eax
je 0x439143
mov edi, dword [esp + 0x50]
mov ebx, dword [esp + 0x58]
cmp byte [esp + 0x67], 0
jns 0x438dec
push dword [esp + 0x5c]
call fcn.00564050
add esp, 4
test ebx, ebx
js 0x43917f
mov eax, ebx
shr eax, 0x18
mov dword [esp], esi
test eax, eax
jne 0x438e0a
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov dword [esp + 8], eax
cmp dword [esp + 0x10], 2
jb 0x438e45
mov dword [esp + 0x10], edi
call fcn.004ffee0
cmp dword [0x657038], 0
je 0x439083
mov esi, dword [0x657038]
mov eax, dword [esi]
mov edi, dword [eax]
mov ecx, edi
call dword [0x6401dc]
mov ecx, esi
push dword [esp + 4]
call edi
mov edi, dword [esp + 0x10]
mov esi, dword [esp + 0x14]
cmp byte [esi + 0x2b], 0
jns 0x438e5c
lea eax, [esi + 0x20]
push dword [eax]
call fcn.00564050
add esp, 4
mov dword [esi + 0x20], edi
mov eax, dword [esp]
mov dword [esi + 0x24], eax
mov dword [esi + 0x28], ebx
cmp dword [esp + 0x34], 0
je 0x439068
push 0
call dword [sym.imp.USER32.dll_GetTopWindow]
test eax, eax
je 0x439068
mov edi, eax
mov dword [esp], 0
mov esi, dword [sym.imp.USER32.dll_IsWindowVisible]
mov ebx, dword [sym.imp.USER32.dll_GetWindow]
mov dword [esp + 4], 0
jmp 0x438eb3
mov esi, dword [sym.imp.USER32.dll_IsWindowVisible]
push 2
push edi
call ebx
mov edi, eax
test eax, eax
je 0x438ee9
push edi
call esi
test eax, eax
je 0x438ea8
mov dword [esp + 0x68], 0
lea eax, [esp + 0x68]
push eax
push edi
call dword [sym.imp.USER32.dll_GetWindowThreadProcessId]
mov eax, dword [esp + 0x68]
lea ecx, [esp + 0x2c]
mov esi, ecx
mov esi, dword [esi + 4]
cmp esi, ecx
je 0x438ea2
cmp dword [esi + 8], eax
jne 0x438ed8
jmp 0x43911c
mov ecx, dword [fcn.005608f0]
cmp ecx, 0x5531a0
mov ebx, dword [esp + 0x14]
jne 0x43904b
xor eax, eax
mov dword [esp + 0x6c], eax
mov dword [esp + 0x68], eax
lea eax, [esp + 0x68]
push eax
call dword [sym.imp.KERNEL32.dll_QueryPerformanceCounter]
mov edi, dword [esp + 0x68]
mov esi, dword [esp + 0x6c]
mov eax, 0x7bd05af7
cmp edi, eax
mov eax, esi
mov ecx, 0x863
sbb eax, ecx
jge 0x4392b7
mov ecx, 0xf4240
mov eax, edi
mul ecx
imul ecx, esi, 0xf4240
add ecx, edx
push dword [0x64b6cc]
push dword [0x64b6c8]
push ecx
push eax
call fcn.005877d0
mov edi, eax
sub edi, dword [esp + 0x38]
sbb edx, dword [esp + 0x3c]
seto al
mov esi, edx
sar esi, 0x1f
test al, al
cmovne edi, esi
add esi, 0x80000000
test al, al
cmove esi, edx
pxor xmm0, xmm0
movdqu xmmword [esp + 0x9c], xmm0
movdqu xmmword [esp + 0x8c], xmm0
movdqu xmmword [esp + 0x7c], xmm0
movdqu xmmword [esp + 0x6c], xmm0
mov dword [esp + 0x68], 0x44
lea eax, [esp + 0x68]
push eax
call dword [sym.imp.KERNEL32.dll_GetStartupInfoW]
mov eax, dword [esp + 0x94]
shr eax, 0xb
and al, 1
cmp byte [ebx + 0x18], 1
je 0x4391ea
test ebx, ebx
je 0x4390cd
mov ecx, dword [esp]
mov dword [ebx], ecx
mov ecx, dword [esp + 4]
mov dword [ebx + 4], ecx
mov dword [ebx + 8], edi
mov dword [ebx + 0xc], esi
mov ecx, dword [esp + 0xc]
mov byte [ebx + 0x10], cl
mov byte [ebx + 0x11], al
mov byte [ebx + 0x18], 1
mov eax, dword [esp + 8]
mov dword [ebx + 0x2c], eax
cmp dword [esp + 0x34], 0
je 0x439033
lea esi, [esp + 0x2c]
mov ecx, dword [esi]
mov eax, dword [esi + 4]
mov ecx, dword [ecx + 4]
mov edx, dword [eax]
mov dword [edx + 4], ecx
mov edx, dword [eax]
mov dword [ecx], edx
mov dword [esi + 8], 0
cmp eax, esi
je 0x439033
test eax, eax
je 0x4390e2
mov edi, dword [eax + 4]
push eax
call fcn.00564050
add esp, 4
mov eax, edi
cmp edi, esi
jne 0x439019
mov ecx, dword [esp + 0x2a8]
xor ecx, ebp
call fcn.00567335
mov eax, ebx
lea esp, [ebp - 0xc]
pop esi
pop edi
pop ebx
pop ebp
ret
call dword [0x6401dc]
lea eax, [esp + 0x68]
push eax
call ecx
add esp, 4
mov edi, dword [esp + 0x68]
mov edx, dword [esp + 0x6c]
jmp 0x438f58
mov dword [esp], 0
mov dword [esp + 4], 0
jmp 0x438ee9
xor edi, edi
jmp 0x438d2c
push 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
push 0x6338bd
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x43934a
mov ecx, eax
cmp eax, sym.browser.exe_GetHandleVerifier
je 0x4390c0
call dword [0x6401dc]
call ecx
push 0
push eax
call fcn.0043a140
add esp, 8
jmp 0x438e27
push 1
push 0
jmp 0x4390b3
push str....._third_partylibc_srcinclude_string:2719:_assertion___s___nullptr_failed:_string::assign_received_nullptr_n
jmp 0x4390e7
push str....._third_partylibc_srcinclude__memoryconstruct_at.h:40:_assertion___location___nullptr_failed:_null_pointer_given_to_construct_at_n
jmp 0x4390e7
push str....._third_partylibc_srcinclude_string_view:318:_assertion___len___static_cast_size_type__numeric_limits_difference_type_::max____failed:_string_view::string_view__CharT___size_t_:_length_does_not_fit_in_difference_type_n
jmp 0x4390e7
push str....._third_partylibc_srcinclude_string_view:320:_assertion___len__0____s___nullptr_failed:_string_view::string_view__CharT___size_t_:_received_nullptr_n
jmp 0x4390e7
push str....._third_partylibc_srcinclude__memoryconstruct_at.h:66:_assertion___loc___nullptr_failed:_null_pointer_given_to_destroy_at_n
push 0x624e92
call fcn.005912b0
push str....._third_partylibc_srcinclude_string_view:268:_assertion___s___nullptr_failed:_null_pointer_passed_to_non_null_argument_of_char_traits_..._::length_n
jmp 0x4390e7
xor eax, eax
inc eax
lea ecx, [esp + 0x2c]
mov dword [ecx], ecx
mov dword [ecx + 4], ecx
mov dword [ecx + 8], 0
mov dword [esp + 0xc], 0
lea ebx, [esp + 0x68]
jmp 0x438c56
push 0xfffffffffffffff0
push edi
call dword [sym.imp.USER32.dll_GetWindowLongW]
test eax, eax
jns 0x439186
cmp dword [esp + 4], 0
jne 0x438ea2
mov eax, dword [esi + 8]
mov dword [esp], eax
mov dword [esp + 4], edi
jmp 0x438ea2
test cl, cl
jns 0x439153
push dword [esp + 0x50]
call fcn.00564050
add esp, 4
xor edi, edi
xor esi, esi
xor ebx, ebx
jmp 0x438dd9
xor edi, edi
jmp 0x43916b
xor edi, edi
mov dword [esp], 0
xor ebx, ebx
jmp 0x438e00
mov dword [esp + 0xc], 0
jmp 0x438aac
mov eax, esi
jmp 0x438df9
mov eax, dword [esi + 8]
mov dword [esp], eax
mov dword [esp + 4], edi
jmp 0x438ee9
push eax
call fcn.004f4f20
add esp, 4
jmp 0x4388e3
inc ebx
cmp dword [esp + 8], ebx
jne 0x438a97
jmp 0x438aac
mov ebx, dword [esp + 0x14]
mov eax, dword [esp + 8]
mov dword [ebx + 0x2c], eax
jmp 0x439033
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov dword [esp + 8], eax
lea eax, [esp + 0x2c]
mov dword [eax], eax
mov dword [eax + 4], eax
mov dword [eax + 8], 0
mov dword [esp + 0xc], 0
jmp 0x438c9c
mov ecx, dword [esp]
mov dword [ebx], ecx
mov ecx, dword [esp + 4]
mov dword [ebx + 4], ecx
mov dword [ebx + 8], edi
mov dword [ebx + 0xc], esi
mov ecx, dword [esp + 0xc]
mov byte [ebx + 0x10], cl
mov byte [ebx + 0x11], al
jmp 0x438feb
lea ecx, [esp + 0x2c]
mov dword [ecx], ecx
mov dword [ecx + 4], ecx
mov dword [ecx + 8], 0
mov edx, ecx
lea ebx, [esp + 0x68]
push ebx
call fcn.005bcde0
add esp, 4
mov dword [esp + 0xc], 0
jmp 0x438c3f
mov eax, dword [0x64b6c8]
mov dword [esp], eax
mov ecx, dword [0x64b6cc]
mov dword [esp + 8], ecx
push ecx
push eax
push esi
push edi
call fcn.005877d0
mov ebx, edx
mov ecx, eax
mul dword [esp]
mov dword [esp + 4], eax
mov eax, ecx
imul ecx, dword [esp + 8]
add edx, ecx
imul ecx, ebx, 0xf4240
mov dword [esp + 0xc], ecx
imul ebx, dword [esp]
add ebx, edx
sub edi, dword [esp + 4]
sbb esi, ebx
mov ecx, 0xf4240
mul ecx
mov dword [esp + 4], eax
mov ebx, edx
add ebx, dword [esp + 0xc]
mov eax, edi
mul ecx
imul ecx, esi, 0xf4240
add edx, ecx
push dword [esp + 8]
push dword [esp + 4]
push edx
push eax
call fcn.005877d0
add eax, dword [esp + 4]
adc edx, ebx
mov ebx, dword [esp + 0x14]
jmp 0x438841
mov ebx, dword [0x64b6c8]
mov dword [esp + 0x20], ebx
mov eax, dword [0x64b6cc]
mov dword [esp + 0x10], eax
push eax
push ebx
push esi
push edi
call fcn.005877d0
mov dword [esp + 0x24], edx
mov ecx, eax
mul ebx
mov dword [esp + 0x1c], eax
mov dword [esp + 0x28], ecx
imul ecx, dword [esp + 0x10]
add edx, ecx
mov ebx, dword [esp + 0x14]
mov eax, dword [esp + 0x24]
imul ecx, eax, 0xf4240
mov dword [esp + 0x18], ecx
imul eax, dword [esp + 0x20]
add eax, edx
sub edi, dword [esp + 0x1c]
sbb esi, eax
mov ecx, 0xf4240
mov eax, dword [esp + 0x28]
mul ecx
mov dword [esp + 0x1c], eax
add edx, dword [esp + 0x18]
mov dword [esp + 0x18], edx
mov eax, edi
mul ecx
imul ecx, esi, 0xf4240
add edx, ecx
push dword [esp + 0x10]
push dword [esp + 0x24]
push edx
push eax
call fcn.005877d0
mov edi, eax
add edi, dword [esp + 0x1c]
adc edx, dword [esp + 0x18]
jmp 0x438f58
xor eax, eax
push eax
jmp 0x4390b2