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Guan Tianfeng

Crime · Sanctioned entity · Wanted

Guan Tianfeng is subject to sanctions. See the individual program listings below.

Type	Person				[sources]
Name	GUAN, Tianfeng · Guan Tianfeng · Tianfeng Guan · 天烽关				[sources]
Weak alias	gbigmao · gxiaomao				[sources]
Birth date	1994-01-07				[sources]
Place of birth	China · Jiangcheng District, Yangjiang Municipality, Guangdong Province, China				[sources]
Gender	male				[sources]
Nationality	China				[sources]
Country	China				[sources]
Eye color	Brown				[sources]
First name	Tianfeng · 天烽				[sources]
Hair color	Black				[sources]
ID Number	`441702199401071411`				[sources]
Last name	Guan · 关				[sources]
Unique Entity ID	`ZHHDP48581H4`				[sources]
Ethnicity	Asian				[sources]
Address	Chengdu City High-Tech Zone, Tianfu Avenue North Section, Annex 18, Number 5, Chengdu · SICHUAN, CHN				[sources]
Source link	home.treasury.gov · sanctionssearch.ofac.treas.gov · www.fbi.gov				[sources]
Last change	2025-10-29	Last processed	2025-11-20	First seen	2024-12-10

Descriptions

It is believed that Guan Tianfeng is currently residing in Sichuan Province, China. He also has ties to or may visit Bangkok, Thailand.

— US FBI Most Wanted, 2024-12-12

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.

— US FBI Most Wanted, 2024-12-12

Relationships

Sanctions
Country	Authority	Program	Start date	End date
United States	Office of Foreign Assets Control		-	-

Address
Full address	Country
Chengdu City High-Tech Zone, Tianfu Avenue North Section, Annex 18, Number 5, Chengdu	China

Documents
Document	Date
Treasury Sanctions Cybersecurity Company Involved in Compromise of Firewall Products and Attempted Ransomware Attacks	2024-12-10

Identifications
Document number	Country	Type	Start date	End date
`441702199401071411`	China	National ID No.	-	-

Data sources

US Trade Consolidated Screening List (CSL)23,387

The Consolidated Screening List (CSL) is a list of parties for which the United States Government maintains restrictions on certain exports, re-exports, or transfers of items.

United States · ITA

US OFAC Specially Designated Nationals (SDN) List35,452

The primary United States' sanctions list, specially designated nationals (SDN) part.

United States · OFAC

US SAM Procurement Exclusions105,653

A database of suppliers who have been excluded from participating in US federal procurement.

United States · GSA

US FBI Most Wanted474

The FBI Ten Most Wanted Fugitives is a most wanted list maintained by the United States's Federal Bureau of Investigation (FBI).

United States · FBI

External databases

The record has been enriched with data from the following external databases:

US OFAC Press Releases7,318

US OFAC press releases that provide context and details related to sanctioned entities.

External dataset · United States · OFAC

Source data IDs: us-fbi-guan-tianfeng · ofac-52263 · ofac-pr-816d6f4f0375e27776c09e942480101f99be19bd · usgsa-s4mrvjrtt

For experts: raw data explorer

Factsheet Descriptions Data sources

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