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The Top 10 Worst

The World's Worst Spammers

Up to 80% of spam targeted at internet users around the world is generated by a hard-core group of around 100 known persistent spam gangs whose names, aliases and operations are documented in Spamhaus' Register Of Known Spam Operations (ROKSO) database.

This TOP 10 chart of ROKSO-listed spammers is based on Spamhaus views of the highest threat, least repentant, most persistent, and generally the worst of the career spammers causing the most damage on the internet currently.


Source: Register Of Known Spam Operations (ROKSO) database + Spamhaus Blocklist (SBL) database. Detailed records on each spammer or spam gang listed can be viewed by clicking on the names.
The 10 Worst Spammers
As of 17 September 2019 the world's worst spammers and spam gangs are:

1
Canadian Pharmacy - Ukraine
A long time running pharmacy spam operation. They send tens of millions of spams per day using botnet techniques. Probably based in Eastern Europe, Ukraine/Russia. Host spammed web sites on botnets and on bulletproof Chinese web hosting.

2
Blaze Media Solutions - United States of America
Snowshoe spam organization that uses large numbers of inexpensive, automated VPS hosting IP addresses and domains in whatever TLD is currently cheapest to send high volumes of spam to extremely dirty, scraped lists. Operates under many business and individual names. Owner or manager of these companies seems to be Michael Boehm and Associates.

3
PredictLabs / Sphere Digital - United States of America
This operation uses dozens of "hosting" companies as fronts to lease IP addresses which are then used to send spam. Based in Chicago, Illinois and Tangier, Morocco.

4
Guangzhou-Seoul Information Technology Co., Ltd. (广州智尔信息科技有限公司) - China
Chinese organization sending spam in english, usually advertising chinese companies, to harvested addresses throughout the world. Also, they send spam in chinese to acquire new customers.

5
RR Media - United States of America
A high volume spam operation based in or run from Huntington Beach, CA, USA. The operation uses a variety of different names.

6
Cyber World Internet Services/ e-Insites - United States of America
Bulletproof spam host operating Cyber World Internet Services / e-Insites, and currently spamming using a variety of aliases such as Brand 4 Marketing, Ad Media Plus, Site Traffic Network, RCM Delivery, and eBox. The company is owned or managed by Alvin Slocombe.

7
Kobeni Solutions - United States of America
High volume snowshoe spam operation based in Florida. The manager or owner of the company seems to be a Yair Shalev / . (Former?) partner-in-spam of ROKSO spammer Darrin Wohl. Son-in-law of ROKSO-listed spammer Dan Abramovich. Sued for fraud by the US FTC in 2014.

8
Richpro Trade Inc. / Richvestor GmbH - Germany
Uses botnets or hires botnet spammers to send spam linking back to suspect investment, "quack-health-cures" and other sites that he owns or is an affiliate of. Botnet spamming and hosting sites on hacked servers is fully criminal in much of the world. Managed or owned by a Timo Richert.

9
Ruslan Ibragimov / send-safe.com - Russian Federation
Stealth spamware creator. One of the larger criminal spamming operations around. Runs a CGI mailer on machines in Russia and uses hijacked open proxies and virus infected PC bots to flood the world with spam.

10
Yambo Financials - Ukraine
Huge spamhaus tied into distribution and billing for child, animal, and incest-porn, pirated software, and pharmaceuticals. Run their own merchant services (credit-card "collection" sites) set up as a fake "bank."

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