extremecoders-re

Scenario:

multiple USB devices plugged via hub to a host (Linux OS based),
multiple services/programs interacting with TTY running on top (e.g. GPSd)

Problem:

At boot TTY are randomly assigned to devices causing depending services/programs instabilities. They could indeed fail to start because of different TTY configurations.

Solution:

Go (Golang) GOOS and GOARCH

All of the following information is based on go version go1.17.1 darwin/amd64.

GOOS Values

GOOS	Out of the Box
`aix`	✅
`android`	✅

WannaCry|WannaDecrypt0r NSA-Cyberweapon-Powered Ransomware Worm

Virus Name: WannaCrypt, WannaCry, WanaCrypt0r, WCrypt, WCRY
Vector: All Windows versions before Windows 10 are vulnerable if not patched for MS-17-010. It uses EternalBlue MS17-010 to propagate.
Ransom: between $300 to $600. There is code to 'rm' (delete) files in the virus. Seems to reset if the virus crashes.
Backdooring: The worm loops through every RDP session on a system to run the ransomware as that user. It also installs the DOUBLEPULSAR backdoor. It corrupts shadow volumes to make recovery harder. (source: malwarebytes)
Kill switch: If the website www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com is up the virus exits instead of infecting the host. (source: malwarebytes). This domain has been sinkholed, stopping the spread of the worm. Will not work if proxied (source).

update: A minor variant of the viru

First Method

Deleting the .git folder may cause problems in our git repository. If we want to delete all of our commits history, but keep the code in its current state, try this:

# Check out to a temporary branch:
git checkout --orphan TEMP_BRANCH

# Add all the files:
git add -A

All of Genymotion OVAs are listed here for download, ⛔️ but️ there is only one OVA for each API (They are listed in the end of this file 😌).

generated at 2020-12-17

📱 Amazon Fire 7 (7", 1024x600, MDPI) AOSP6.0.0 API 23 310.50 MB

📱 Amazon Fire 7 (7", 1024x600, MDPI) AOSP7.1.0 API 25 361.70 MB

📱 Amazon Fire HD 10 (10.1", 1920x1200, HDPI) AOSP9.0 API 28 416.75 MB

Running Ubuntu 16.04.1 armhf on Qemu

This is a writeup about how to install Ubuntu 16.04.1 Xenial Xerus for the 32-bit hard-float ARMv7 (armhf) architecture on a Qemu VM via Ubuntu netboot.

The setup will create a Ubuntu VM with LPAE extensions (generic-lpae) enabled. However, this writeup should also work for non-LPAE (generic) kernels.

The performance of the resulting VM is quite good, and it allows VMs with >1G ram (compared to 256M on versatilepb and 1G on versatile-a9/versatile-a15). It also supports virtio disks whereas versatile-a9/versatile-a15 only support SD cards via the -sd argument.

Get netboot files

https://developer.microsoft.com/en-us/microsoft-edge/tools/vms/

You might want to read this to get an introduction to armel vs armhf.

If the below is too much, you can try Ubuntu-ARMv7-Qemu but note it contains non-free blobs.

Running ARM programs under linux (without starting QEMU VM!)

First, cross-compile user programs with GCC-ARM toolchain. Then install qemu-arm-static so that you can run ARM executables directly on linux

	%.hex: %.asm
	avra -fI $<
	rm .eep.hex .obj *.cof

	all: $(patsubst %.asm,%.hex,$(wildcard *.asm))

	upload: ${program}.hex
	avrdude -c arduino -p m328p -P /dev/arduino-uno -b 115200 -U flash:w:$<

	monitor:

	"""
	Wrapper for the Relooper api.
	"""

	"""
	RELOOPERDLL_API void rl_set_output_buffer(char *buffer, int size);
	RELOOPERDLL_API void rl_make_output_buffer(int size);
	RELOOPERDLL_API void rl_new_block(const char text);
	RELOOPERDLL_API void rl_delete_block(void *block);
	RELOOPERDLL_API void rl_block_add_branch_to(void from, void to, const char condition, const char code);