mirror of
https://github.com/thomasxm/amber
synced 2026-06-08 17:46:04 +00:00
Ege Balcı
fae3275b68
- Major loader update! - Added TLS callback support - Added forwarded imports support - Removed GetProcAddress and LoadLibrary WinAPI usage - Switched to NTDLL WinApi functions - Wiper code improved - Added lite loader option for appending PE files on the fly! - Added experimental raw syscall loader - Added static build flags in makefile - File name bug fixed - Dockerfile updated - Github workflows added - README updated
62 lines
3.3 KiB
NASM
62 lines
3.3 KiB
NASM
;#==============================================#
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;# X64 Reflective Loader #
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;# Author: Ege Balcı <egebalci@pm.me> #
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;# Version: 3.0 #
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;#==============================================#
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;
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[BITS 64]
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%define e_lfanew 0x3C
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%define _AddressOfEntry 0x28
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call start ; Get the address of PE image to stack
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incbin "putty.exe" ; PE file.
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start:
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pop rsi ; Get the address of PE to RSI
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push rbp ; Save RBP
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mov rbp,rsp ; Create a stack frame
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mov rcx,rsi ; Move the image address as first parameter
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call map_image ; Perform PE image mapping
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mov rdi, rax ; Get the address of mapped PE image into RDI
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mov rcx, rdi ; Move a copy of the mapped image address into RCX as first parameter
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call resolve_imports ; Resolve image imports
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mov rcx, rdi ; Set the mapped image address as first parameter
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call relocate_image ; Perform image base relocation
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mov rcx, rdi ; Set the mapped image address as first parameter
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call protect_sections ; Apply proper section memory protections
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mov rcx, rdi ; Set the mapped image address as first parameter
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call run_tls_callbacks ; Try to execute TLS callbacks. May fail... ¯\_(ツ)_/¯
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xor rax, rax ; Clear out RAX
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mov eax, DWORD [rdi+e_lfanew] ; Get the file header offset
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mov eax, DWORD [rdi+rax+_AddressOfEntry] ; Get the AddressOfEntry into EAX
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add rax,rdi ; Add the AOE onto new image base
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jmp wipe ; Start wiping memory artifacts...
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; ------------------------ FUNCTIONS ------------------------------------
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%include "./inc/memcpy.asm"
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%include "./inc/calc_crc.asm"
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%include "./inc/map_image.asm"
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%include "./inc/load_module.asm"
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%include "./inc/relocate_image.asm"
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%include "./inc/resolve_imports.asm"
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%include "./inc/get_proc_by_crc.asm"
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%include "./inc/get_module_by_crc.asm"
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%include "./inc/protect_sections.asm"
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%include "./inc/run_tls_callbacks.asm"
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%include "../crc32_api/crc32_api_x64.asm"
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%include "../syscall_api/syscall_api.asm"
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;------------------------ FUNCTIONS -------------------------------------
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wipe:
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wipe_code_size equ wipe_end-(wipe)
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call $+5 ; Get current EIP to stack
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pop rcx ; Pop currect EIP to RCX
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sub rcx,rsi ; Calculate the size of the PE file
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add rcx,wipe_code_size ; Add the size of wipe code
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mov rdi,rsi ; Move the PE address to RDI
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sub rdi,0x5 ; Go back 5 bytes for wiping the initial call as well
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wipe_end:
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rep stosb ; Store AL into RDI and decrement RDI until RCX = 0
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; -------------------- SWITCH TO PE ----------------------------
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cld ; Clear direction flags
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mov rsp, rbp ; Restore stack frame
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pop rbp ; Restore RBP
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jmp rax ; Jmp to the PE->AOE |