摘要
为准确判断复杂多步攻击的意图和下一步攻击行为,需要对入侵告警进行定量关联分析。针对复杂多步攻击产生的告警在序列中经常间隔出现的实际,提出一种间隔告警定量关联方法。利用一阶马尔可夫性质建立告警关联模型,定量地表示攻击者选择不同攻击路径的可能性,利用Apriori频繁序列挖掘算法得出频繁告警2-序列的支持度,将归一化的序列支持度作为马尔可夫链的一步转移概率。利用DARPA2000真实网络数据集进行实验,实验结果表明,该方法对复杂多步攻击告警的关联准确率优于传统方法。
To help the administrators predict the intention and next actions of complex multi-step attacks,it is necessary to correlate the alerts quantitatively.Considering that the alerts generated by a complex multi-step attack occurred at intervals in the alert sequence,aquantitative correlation method for intervallic alerts was presented.The alerts correlation model was established based on one-step Markov chains,thus evaluating the likelihood that different paths would be selected by attackers.The transition probabilities of the Markov chains were calculated based on the support degrees of frequent alert sequences,and the support degrees were defined using the Apriori algorithm.An experiment based on the DARPA2000 dataset verifies that the proposed method can correlate the alerts generated by a complex multi-step attack more accurately than traditional methods.
作者
李洪成
王成
王春雷
袁峰
LI Hong-cheng;WANG Cheng;WANG Chun-lei;YUAN Feng(College of Joint Operations,National Defence University,Shijiazhuang 050000,China)
出处
《计算机工程与设计》
北大核心
2019年第11期3073-3078,共6页
Computer Engineering and Design
基金
国家自然科学基金项目(61672531)
关键词
多步攻击关联
间隔告警
频繁序列挖掘
马尔可夫性质
转移概率矩阵
multi-step attack correlation
intervallic alerts
frequent sequence mining
Markov property
transition probability matrix