CCS Concepts: • Security and privacy ;

1 INTRODUCTION

2 CASE STUDIES OF REAL-WORLD CYBER ATTACKS

2.1 APT41: Advanced Persistent Threats Analysis

2.2 Cyber attack on the Ukrainian Power Grid

2.3 Cyber Heist at Bangladesh Bank

3 RELATED LITERATURE SURVEYS

3.1 Surveys of Reconnaissance Techniques

3.2 Surveys of Reconnaissance Tools

4 RECONNAISSANCE TARGET INFORMATION

4.1 Non-Technical Information

4.2 Technical Information

5 RECONNAISSANCE PHASES

5.1 External Reconnaissance

5.2 Internal Reconnaissance

6 RECONNAISSANCE TECHNIQUES

7 CONCLUSION AND FUTURE WORK