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arm_now 1.2

arm_now is a qemu powered tool that allows instant setup of virtual machines on arm cpu, mips, powerpc, nios2, x86 and more, for reverse, exploit, fuzzing and programming purpose.

Alt Text

Install

# pip3 install https://github.com/nongiach/arm_now/archive/master.zip --upgrade
# # Or you can also do:
# pip3 install arm_now

Supported System: Linux, Windows WSL, MacOS, Docker.

Docker install

If you are using docker, just run and enjoy!

$ docker run -it --name arm_now -v $PWD:/mount --rm bannsec/arm_now_docker arm_now

For a bash function wrapper see here: https://github.com/bannsec/arm_now_docker

Start an arm Virtual Machine

$ arm_now start armv5-eabi
Welcome to arm_now
buildroot login: root
# uname -m
armv7l

Resizing an arm Virtual Machine

$ arm_now resize +10G
WARNING: Image format was not specified for 'arm_now/rootfs.ext2' and probing guessed raw.
         Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
         Specify the 'raw' format explicitly to remove the restrictions.
Image resized.

Debug the ls binary on mips

$ arm_now start mips32el
Welcome to arm_now
buildroot login: root
# gdb /bin/ls
(gdb) start
Temporary breakpoint 1, 0x00405434 in main ()
(gdb) x/i $pc
=> 0x405434 <main+12>:	li	a0,-1

How to exit qemu

Press "Ctrl + ]" (Ctrl + altgr + ] on azerty).

Wiki

All features and good use cases are documented in the wiki: https://github.com/nongiach/arm_now/wiki

  • Exploit a heap use after free on PowerPC
  • Run the game of life on a FPGA cpu (MicroBlaze)
  • Share files
  • Install new package
  • ..

Supported cpu

CPU images
arm armv5-eabi, armv6-eabihf, armv7-eabihf
m68k m68k-coldfire
microblaze microblazeel, microblazebe
mips mips32, mips32el, mips32r5el, mips32r6el
mips64 mips64-n32, mips64el-n32
xtensa xtensa (a configurable processor)
nios2 nios2
powerpc powerpc64-e5500, powerpc64-power8, powerpc64le-power8
sh4 sh-sh4
x86-32 x86-core2, x86-i686
x86-64 x86-64-core-i7
aarch64 aarch64

Writeups

Link Credit
MIPS binary exploitation challenge Aperikube

Ping me for any new writeups.

Project using arm_now

Project Credit
Mandibule: linux elf injector for x86 x86_64 arm arm64 ixty

By @chaignc #HexpressoTeam.

About

arm_now is a qemu powered tool that allows instant setup of virtual machines on arm cpu, mips, powerpc, nios2, x86 and more, for reverse, exploit, fuzzing and programming purpose.

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