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上海就勒索软件发出预警:已构成较严重安全威胁

2017-05-15 01:04:36   第一财经

5月12日,互联网上出现针对Windows操作系统的勒索软件(Wannacry)攻击案例。目前,包括高校、能源等重要信息系统在内的多类用户受到攻击,已对我国互联网络构成较为严重的安全威胁。

部分中病毒电脑出现的勒索信截图

上海市互联网信息办公室13日表示,该勒索软件利用已披露的Windows SMB服务漏洞(对应微软漏洞公告:MS17-010)攻击手段,对计算机中的文档、图片等实施高强度加密,并向用户勒索赎金。市网信办已于13日下午向本市各关键信息基础设施单位发出预警,各单位一旦发现感染,要及时报告相关情况,并开展应急处置。

上海市网信办建议广大互联网用户:

[1]升级Windows操作系统,目前微软公司已发布相关补丁程序MS17-010,可通过微软公司正规渠道进行升级。

[2]安装并及时更新杀毒软件。

[3]不要轻易打开来源不明的电子邮件。

[4]及时关闭计算机、网络设备上的445端口。

[5]要切实做好内网的安全管理,关闭非必需端口,及时升级,严格做好内外网隔离。

[6]定期在不同的存储介质上备份计算机上的重要文件。

[7]切勿轻信网上所谓的有偿解密方法、渠道,小心网络诈骗分子利用这次事件招摇撞骗。

附:技术防护措施

一、下载安装微软已发布修复“永恒之蓝”攻击的系统漏洞补丁MS17-010。

补丁网址为:

https://technet.microsoft.com/zh-cn/library/security/MS17-010

Windows xp和2003的补丁:

https://blogs.technet.microsoft.com/msrc/2017/05/12/customer-guidance-for-wannacrypt-attacks/

二、在 Windows 电脑上运行系统自带的免费杀毒软件并启用 Windows Updates 的用户可以免受这次病毒的攻击。

Windows 10的用户可以通过【设置】-【Windows 更新】启用 Windows Updates 安装最新的更新,同时可以通过【设置】-【Windows Defender】,打开安全中心。

三、关闭445端口,关闭网络共享。

通用方法如下(不同操作系统略有差异):

1.【运行】输入“regedit”。

2.确定后定位到 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servi ces\NetBT\Parameters目录。

3.新建名为“SMBDeviceEnabled”的DWORD值,并将其设置为0,则可关闭445端口。

责任编辑:穆启春 CN063
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