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| Title: | 網路偵查攻擊之封包式欺騙防禦
DEFIC: Defensive Packet Deception on Reconnaissance Attack |
| Authors: | 林子翔
Lin, Zih-Siang |
| Contributors: | 郁方
Yu, Fang
林子翔
Lin, Zih-Siang |
| Keywords: | 網路殺攻擊鍊
網路偵查
欺騙式防禦
作業系統指紋
連接埠掃描
Cyber kill chain
Network reconnaissance
Defensive deception
OS fingerprint
Port scanning |
| Date: | 2022 |
| Issue Date: | 2022-08-01 17:25:09 (UTC+8) |
| Abstract: | 網絡偵查是網絡攻擊鏈的第一階段，攻擊方進行主機發現、端口掃描和作業系統檢測，試圖從遠端主機獲取關鍵資源。
在網絡偵查階段誤導對手可以提供主動保護機制，而非在攻擊實際發生後才採取應對措施，此舉可防止後續階段的武器化和攻擊者的漏洞利用。
在本文中，我們提出了一種新的封包式欺騙防禦框架DEFIC，可用於對抗 Nmap 等第三方網路偵查工具的常見偵查攻擊。
我們所提出的欺騙式防禦框架可以偽造針對連接埠和系統組態之掃描封包的欺騙式回應，以在網絡偵查期間混淆攻擊者，從而使目標主機能夠偽裝其正在運行防禦端所指定的作業系統。
除此之外，我們建構了幾個作業系統模板，可動態針對系統實時狀態、掃描封包的細微差異包與作業系統欺騙策略生成一系列的偽造回應。
初步結果表明，Nmap 很有可能會誤判被我們如隱形斗篷一般的DEFIC所覆蓋的遠程主機。
Network reconnaissance stands the first stage of a cyber kill chain, where adversaries conduct host discovery, port scanning, and operating system detection in order to obtain critical information from remote hosts.
Misleading an adversary in the network reconnaissance phase can provide orthogonal protection in the first place, preventing subsequent phases of weaponization and exploitation from attackers.
In this paper, we propose a novel packet-level defensive deception framework against common reconnaissance attacks that can be employed by third-party reconnaissance tools such as Nmap.
Specifically, we propose DEFIC, a deceptive firewall that can forge fake responses to unknown requests on port and system status to confuse attackers during network reconnaissance and hence provide the target host the ability to pretend running with a designated operating system.
We build several templates of response packets that can be used to reconstruct packets with the desired information and synthesize a sequence of fake packets according to different OS strategies.
Our preliminary results show that the Nmap tool has a high chance of miss-guessing remote hosts that are covered with our invisibility cloak. |
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| Description: | 碩士
國立政治大學
資訊管理學系
109356036 |
| Source URI: | http://thesis.lib.nccu.edu.tw/record/#G0109356036 |
| Data Type: | thesis |
| DOI: | 10.6814/NCCU202200748 |
| Appears in Collections: | [資訊管理學系] 學位論文
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