Dive into a captivating 50-minute conference talk that unravels the mystery behind a potentially dangerous C program discovered in the aftermath of a Swedish federal mainframe breach. Follow along as Soldier of FORTRAN, a renowned mainframe security expert, meticulously deconstructs the enigmatic DeFeNeStRaTe.C file. Explore the intricacies of mainframe privilege escalation, APF unix programs, buffer overflows, return address hijacking, debugging techniques, and ACEE modifications. Gain valuable insights into the Unix component of mainframe systems and witness the program in action. By the end of this presentation, acquire a comprehensive understanding of DeFeNeStRaTe.C's intended functionality and its potential impact on mainframe security.