I-backdoor encane ku-Flask noma indlela yokulawula ikhompuyutha kunethiwekhi yendawo

Sawubona Habr!

Ngisanda kubuka inguqulo elandiwe yokusakazwa kwezinhlelo “Ungazakha kanjani uhlelo lwakho lokusebenza lwewebhu ku-Flask.” Futhi nginqume ukuhlanganisa ulwazi lwami kuphrojekthi ethile. Kwaphela isikhathi eside ngingazi ukuthi ngizobhala ini futhi umqondo weza kimi: "Kungani ungenzi i-mini-backdoor ku-Flask?"

Izinketho zokuqala zokuqalisa kanye namakhono we-backdoor zavela ngokushesha ekhanda lami. Kodwa nginqume ukwenza ngokushesha uhlu lwamakhono angemuva:

1. Yazi ukuthi uwavula kanjani amawebhusayithi
2. Yiba nokufinyelela kumugqa womyalo
3. Ukwazi ukuvula izinhlelo, izithombe, amavidiyo

Ngakho-ke, iphuzu lokuqala lilula kakhulu ukulisebenzisa usebenzisa imojula yesiphequluli. Nginqume ukusebenzisa iphuzu lesibili ngisebenzisa i-os module. Futhi eyesithathu nayo idlula imojula ye-os, kodwa ngizosebenzisa "izixhumanisi" (okuningi kulokho kamuva).

Ibhala iseva

Ngakho, *drumroll* yonke ikhodi yeseva:

from flask import Flask, request
import webbrowser
import os
import re

app = Flask(__name__)
@app.route('/mycomp', methods=['POST'])
def hell():
    json_string = request.json
    if json_string['command'] == 'test':
        return 'The server is running and waiting for commands...'
    if json_string['command'] == 'openweb':
        webbrowser.open(url='https://www.'+json_string['data'], new=0)
        return 'Site opening ' + json_string['data'] + '...'
    if json_string['command'] == 'shell':
        os.system(json_string['data'])
        return 'Command execution ' + json_string['data'] + '...'
    if json_string['command'] == 'link':
        links = open('links.txt', 'r')
        for i in range(int(json_string['data'])):
            link = links.readline()
        os.system(link.split('>')[0])
        return 'Launch ' + link.split('>')[1]
if __name__ == '__main__':
    app.run(host='0.0.0.0')

Sengiyilahle yonke ikhodi, sekuyisikhathi sokuchaza ingqikithi.

Yonke ikhodi isebenza kukhompyutha yendawo ku-port 5000. Ukuze uhlanganyele neseva, kufanele sithumele isicelo se-JSON POST.

Isakhiwo sesicelo se-JSON:

{‘command’:  ‘comecommand’, ‘data’: ‘somedata’}

Hhayi-ke, kunengqondo ukuthi 'umyalo' umyalo esifuna ukuwenza. Futhi 'idatha' yizimpikiswano zomyalo.

Ungabhala futhi uthumele izicelo ze-JSON ukuze uxhumane neseva ngokwenza (izicelo zizokusiza). Noma ungabhala iklayenti le-console.

Ukubhala iklayenti

Ikhodi:

import requests

logo = ['nn',
        '******      ********',
        '*******     *********',
        '**    **    **     **',
        '**    **    **     **      Written on Python',
        '*******     **     **',
        '********    **     **',
        '**     **   **     **      Author: ROBOTD4',
        '**     **   **     **',
        '**     **   **     **',
        '********    *********',
        '*******     ********',
        'nn']

p = ''
iport = '192.168.1.2:5000'
host = 'http://' + iport + '/mycomp'

def test():
    dict = {'command': 'test', 'data': 0}
    r = requests.post(host, json=dict)
    if r.status_code == 200:
        print (r.content.decode('utf-8'))

def start():
    for i in logo:
        print(i)

start()
test()

while True:
    command = input('>')
    if command == '':
        continue
    a = command.split()
    if command == 'test':
        dict = {'command': 'test', 'data': 0}
        r = requests.post(host, json=dict)
        if r.status_code == 200:
            print (r.content.decode('utf-8'))
    if a[0] == 'shell':
        for i in range(1, len(a)):
            p = p + a[i] + ' '
        dict = {'command': 'shell', 'data': p}
        r = requests.post(host, json=dict)
        if r.status_code == 200:
            print (r.content.decode('utf-8'))
        p = ''
    if a[0] == 'link':
        if len(a) > 1:
            dict = {'command': 'link', 'data': int(a[1])}
            r = requests.post(host, json=dict)
            if r.status_code == 200:
                print (r.content.decode('utf-8'))
        else:
            print('Комманда не содержит аргументов!')
    if a[0] == 'openweb':
            if len(a) > 1:
                dict = {'command': 'openweb', 'data': a[1]}
                r = requests.post(host, json=dict)
                if r.status_code == 200:
                    print (r.content.decode('utf-8'))
            else:
                print('Комманда не содержит аргументов!')
    if a[0] == 'set':
        if a[1] == 'host':
            ip = a[2] + ':5000'
    if command == 'quit':
        break

Izincazelo:

Okokuqala, imojula yezicelo ingenisiwe (ngokusebenzelana neseva). Ngezansi kunezincazelo zemisebenzi yokuqala neyokuhlola. Bese kuba umjikelezo okwenzeka kuwo umlingo. Uyifundile ikhodi? Ngakho uyayiqonda incazelo yomlingo okwenzeka emjikelezweni. Faka umyalo - wenziwe. Igobolondo - imiyalo yomugqa womyalo (i-logic ivaliwe).

Hlola - hlola ukuthi iseva iyasebenza (i-backdoor)
Isixhumanisi - ukusetshenziswa "kwesinqamuleli"
I-Openweb - ukuvula iwebhusayithi
Yeka – phuma kuklayenti
Setha – ukusetha i-ip yekhompyutha yakho kunethiwekhi yendawo

Futhi manje okwengeziwe mayelana nesixhumanisi.

Kukhona ifayela le-link.txt eduze kweseva. Iqukethe izixhumanisi (indlela egcwele) eya kumafayela (amavidiyo, izithombe, izinhlelo).

Isakhiwo simi kanje:

полный_путь>описание
полный_путь>описание

Umphumela

Sineseva yangemuva yokulawula ikhompuyutha kunethiwekhi yendawo (ngaphakathi kwenethiwekhi ye-wi-fi). Ngobuchwepheshe, singasebenzisa iklayenti kunoma iyiphi idivayisi enotolika we-python.

PS Ngengeze umyalo obekiwe ukuze uma ikhompyutha kunethiwekhi yendawo yabelwe i-IP ehlukile, ingashintshwa ngqo kuklayenti.

Source: www.habr.com