GUAN TIANFENG
Also known as: gbigmao, gxiaomao
Current age (if alive)
32
Gender
male
Nationality
China
Date of case
12/3/2024
Country
United States
Physical Description
Eye color
Brown
Hair color
Black
Ethnicity
Asian
Additional Photos
Caution
Guan Tianfeng is wanted for his alleged role in conspiring to access Sophos firewalls without authorization, cause damage to them, and retrieve and exfiltrate data from both the firewalls themselves and the computers behind these firewalls. The exploit was used to infiltrate approximately 81,000 firewalls. It is alleged that Guan Tianfeng's role in the conspiracy was to develop and test the zero-day vulnerability used to conduct the attack. A federal arrest warrant was issued for Guan Tianfeng in the United States District Court, Northern District of Indiana, Hammond Division, after he was charged with conspiracy to commit computer fraud and conspiracy to commit wire fraud.
Remarks
It is believed that Guan Tianfeng is currently residing in Sichuan Province, China. He also has ties to or may visit Bangkok, Thailand.
Reward
The Rewards For Justice Program, United States Department of State, is offering a reward of up to $10 million for information on Guan Tianfeng, Sichuan Silence Technology Company Ltd., associated individuals or entities, or their malicious cyber activity.
Last updated: 5/30/2026