### Abstract

We study the problem of detecting malicious IP traffic in the network early, by analyzing the contents of packets. Existing systems look at packet contents as a bag of substrings and study characteristics of its base distribution B where B(i) is the frequency of substring i.We propose studying the inverse distribution I where I(f) is the number of substrings that appear with frequency f. As we show using a detailed case study, the inverse distribution shows the emergence of malicious traffic very clearly not only in its "static" collection of bumps, but also in its nascent "dynamic" state when the phenomenon manifests itself only as a distortion of the inverse distribution envelope. We describe our probabilistic analysis of the inverse distribution in terms of Gaussian mixtures, our preliminary solution for discovering these bumps automatically. Finally, we briefly discuss challenges in analyzing the inverse distribution of IP contents and its applications.

Original language | English (US) |
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Title of host publication | Proceedings of ACM SIGCOMM 2005 Workshop on Mining Network Data, MineNet 2005 |

Pages | 165-170 |

Number of pages | 6 |

DOIs | |

State | Published - 2005 |

Event | ACM SIGCOMM 2005 1st Workshop on Mining Network Data, MineNet 2005 - Philadelphia, PA, United States Duration: Aug 26 2005 → Aug 26 2005 |

### Publication series

Name | Proceedings of ACM SIGCOMM 2005 Workshop on Mining Network Data, MineNet 2005 |
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### Other

Other | ACM SIGCOMM 2005 1st Workshop on Mining Network Data, MineNet 2005 |
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Country | United States |

City | Philadelphia, PA |

Period | 8/26/05 → 8/26/05 |

### Keywords

- content analysis
- inverse distribution
- worms

### ASJC Scopus subject areas

- Computer Science Applications

## Cite this

*Proceedings of ACM SIGCOMM 2005 Workshop on Mining Network Data, MineNet 2005*(pp. 165-170). (Proceedings of ACM SIGCOMM 2005 Workshop on Mining Network Data, MineNet 2005). https://doi.org/10.1145/1080173.1080176