Linux 云服务器中毒排查思路

{"value":"\u5982\u679c\u6211\u4eec\u5728\u63a7\u5236\u53f0\u76d1\u63a7\u4e2d\u53d1\u73b0\uff0cCPU \u6216\u8005\u5185\u5b58\u8dd1\u6ee1\u4e86\u7684\u73b0\u8c61\u65f6\uff0c\u5c31\u9700\u8981\u8fdb\u5165\u4e3b\u673a\u5185\u90e8\u6392\u67e5\u4e00\u4e0b\u3002\n\n### \u6392\u67e5\u65b9\u6cd5 ###\n\n**1.\u4f7f\u7528 top \u547d\u4ee4\u67e5\u770b\u662f\u5426\u6709\u5360\u7528 CPU \u548c\u5185\u5b58\u9ad8\u7684\u8fdb\u7a0b\u3002**\n\n**2.\u5982\u679c\u4f7f\u7528 top \u547d\u4ee4\u627e\u4e0d\u5230\u5360\u7528 CPU \u6216\u8005\u5185\u5b58\u8f83\u591a\u7684\u8fdb\u7a0b\uff0c\u53ef\u4f7f\u7528 busybox \u627e\u51fa\u9690\u85cf\u7684\u8fdb\u7a0b\u3002**\n\n\n wget https:\/\/oc-storage.pek3a.qingstor.com\/busybox # \u4e0b\u8f7d busybox\n \n chmod +x busybox # \u7ed9 busybox \u589e\u52a0\u8fd0\u884c\u6743\u9650\n \n .\/busybox top -b -n 1# \u4f7f\u7528 busybox \u67e5\u770b\u8fdb\u7a0b\u5360\u7528\u8d44\u6e90\u60c5\u51b5\n\n**3.\u4f7f\u7528 ps aux|grep \"\u8fdb\u7a0b\u540d\" \u547d\u4ee4\u67e5\u770b\u5bf9\u5e94\u8fdb\u7a0b\u7684\u4fe1\u606f\u4ee5\u53ca\u8fdb\u7a0b\u6587\u4ef6\u6240\u5904\u4f4d\u7f6e\u3002**\n\n**4.\u67e5\u770b \/etc\/passwd \u662f\u5426\u6709\u5f02\u5e38\u6216\u9690\u85cf\u7528\u6237\uff0cusermod -L xxx \u7981\u7528\u8be5\u7528\u6237\u3002**\n\n**5.\u67e5\u770b\u7cfb\u7edf\u65e5\u5fd7\u3002**\n\n\n \/var\/log\/messages\n\n\u8bb0\u5f55 Linux \u5185\u6838\u6d88\u606f\u53ca\u5404\u79cd\u5e94\u7528\u7a0b\u5e8f\u7684\u516c\u5171\u65e5\u5fd7\u4fe1\u606f\uff0c\u5305\u62ec\u542f\u52a8\u3001IO \u9519\u8bef\u3001\u7f51\u7edc\u9519\u8bef\u3001\u7a0b\u5e8f\u6545\u969c\u7b49\u3002\u5bf9\u4e8e\u672a\u4f7f\u7528\u72ec\u7acb\u65e5\u5fd7\u6587\u4ef6\u7684\u5e94\u7528\u7a0b\u5e8f\u6216\u670d\u52a1\uff0c\u4e00\u822c\u90fd\u53ef\u4ee5\u4ece\u8be5\u6587\u4ef6\u83b7\u5f97\u76f8\u5173\u7684\u4e8b\u4ef6\u8bb0\u5f55\u4fe1\u606f\n\n \/var\/log\/cron\n\n\u8bb0\u5f55 crond \u8ba1\u5212\u4efb\u52a1\u4ea7\u751f\u7684\u4e8b\u4ef6\u6d88\u606f\n\n \/varlog\/dmesg\n\n\u8bb0\u5f55 Linux \u7cfb\u7edf\u5728\u5f15\u5bfc\u8fc7\u7a0b\u4e2d\u7684\u5404\u79cd\u4e8b\u4ef6\u4fe1\u606f\n\n \/var\/log\/maillog\n\n\u8bb0\u5f55\u8fdb\u5165\u6216\u53d1\u51fa\u7cfb\u7edf\u7684\u7535\u5b50\u90ae\u4ef6\u6d3b\u52a8\n\n \/var\/log\/lastlog\n\n\u6700\u8fd1\u51e0\u6b21\u6210\u529f\u767b\u5f55\u4e8b\u4ef6\u548c\u6700\u540e\u4e00\u6b21\u4e0d\u6210\u529f\u767b\u5f55\u4e8b\u4ef6\n\n \/var\/log\/rpmpkgs\n\n\u8bb0\u5f55\u7cfb\u7edf\u4e2d\u5b89\u88c5\u5404 rpm \u5305\u5217\u8868\u4fe1\u606f\n\n \/var\/log\/secure\n\n\u8bb0\u5f55\u7528\u6237\u767b\u5f55\u8ba4\u8bc1\u8fc7\u7a0b\u4e2d\u7684\u4e8b\u4ef6\u4fe1\u606f\u3002\u6709\u53ef\u80fd\u662f \/var\/log\/auth.log\n\n \/var\/log\/wtmp\n\n\u8bb0\u5f55\u6bcf\u4e2a\u7528\u6237\u767b\u5f55\u3001\u6ce8\u9500\u53ca\u7cfb\u7edf\u542f\u52a8\u548c\u505c\u673a\u4e8b\u4ef6\n\n \/var\/log\/utmp\n\n\u8bb0\u5f55\u5f53\u524d\u767b\u5f55\u7684\u6bcf\u4e2a\u7528\u6237\u7684\u8be6\u7ec6\u4fe1\u606f\n\n**6.\u4f7f\u7528 crontab -l \u67e5\u770b\u5f53\u524d\u8d26\u6237\u5b9a\u65f6\u4efb\u52a1\uff0c-u \u53ef\u6307\u5b9a\u8d26\u6237\u3002**"}