通过 DllHost 的异常网络连接
编辑通过 DllHost 的异常网络连接
编辑识别 dllhost.exe 发起出站网络连接的异常实例。这可能表示存在攻击者的命令和控制活动。
规则类型: eql
规则索引:
- winlogbeat-*
- logs-endpoint.events.process-*
- logs-endpoint.events.network-*
- logs-windows.sysmon_operational-*
严重性: 中
风险评分: 47
运行频率: 5 分钟
搜索索引起始时间: now-9m (Date Math 格式,另请参阅 额外回溯时间
)
每次执行的最大警报数: 100
参考:
- https://www.microsoft.com/security/blog/2021/05/27/new-sophisticated-email-based-attack-from-nobelium/
- https://www.volexity.com/blog/2021/05/27/suspected-apt29-operation-launches-election-fraud-themed-phishing-campaigns/
- https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
标签:
- 域: 端点
- 操作系统: Windows
- 用例: 威胁检测
- 战术: 防御规避
- 数据源: Elastic Defend
- 数据源: Sysmon
版本: 207
规则作者:
- Elastic
规则许可: Elastic License v2
规则查询
编辑sequence by host.id, process.entity_id with maxspan=1m [process where host.os.type == "windows" and event.type == "start" and process.name : "dllhost.exe" and process.args_count == 1] [network where host.os.type == "windows" and process.name : "dllhost.exe" and not cidrmatch(destination.ip, "10.0.0.0/8", "127.0.0.0/8", "169.254.0.0/16", "172.16.0.0/12", "192.0.0.0/24", "192.0.0.0/29", "192.0.0.8/32", "192.0.0.9/32", "192.0.0.10/32", "192.0.0.170/32", "192.0.0.171/32", "192.0.2.0/24", "192.31.196.0/24", "192.52.193.0/24", "192.168.0.0/16", "192.88.99.0/24", "224.0.0.0/4", "100.64.0.0/10", "192.175.48.0/24", "198.18.0.0/15", "198.51.100.0/24", "203.0.113.0/24", "240.0.0.0/4", "::1", "FE80::/10", "FF00::/8")]
框架: MITRE ATT&CKTM
-
战术
- 名称: 防御规避
- ID: TA0005
- 参考 URL: https://attack.mitre.org/tactics/TA0005/
-
技术
- 名称: 系统二进制代理执行
- ID: T1218
- 参考 URL: https://attack.mitre.org/techniques/T1218/