Hassan was sacked as Masri coach on Sunday, following his indefinite ban by the FA, along with twin brother Ibrahim, who was embroiled in an infamous tantrum during a regional clash with Algeria's Bejaia last weekend.
Ibrahim's out-of-order acts, preceded by a red card to his twin brother in Algiers, placed the pair at the center of controversy and eventually cost them their jobs.
However, Hossam backed his under-fire brother as he was particularly enraged with the FA's stance in the case.
Corruption
"I lost my job, but I promise to fight corruption of Egyptian football as long as I am alive!" an angry Hossam Hassan told Dream TV on Monday.
"Egyptian fans must be aware of the truth, and I will work on that through the media.
"The decision to suspend us proves how unfair the FA is. Other clubs were involved in similar incidents during continental competitions and the association did not react.
"But the FA board anticipates any slip-up for me and Ibrahim, that’s why they decided to interfere."
The Egypt legend does not believe that his brother was mistaken after he insulted referee Khaled Ramses, assaulted a fourth official and made inappropriate gestures to Algerian fans.
"Ibrahim is not guilty because he was defending Masri players against the dangerous fireworks of the Algerian supporters," he said.
The 42-year-old deplored former Egypt colleagues and current EFA officials Ahmed Shobeir, Magdi Abdul-Ghani and Ayman, in addition to president Samir Zaher.
Hassan has been subjected to several disciplinary actions by the Football Association ever since he started his coaching career two years ago.