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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 August 2018 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
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 - United States
This operation signs up for hosting services which are then used by spammers, possibly with connections to Moroccan spam gangs. "Partner-in-spam" with Michael Persaud, RR Media, Yair Shalev and others.

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
A high volume spam operation based in or run from Huntington Beach, CA, USA. The operation uses a variety of different names.

6
Adgenics / Cabo Networks - United States
Florida affiliate spammers and bulletproof spam hosters

7
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.

8
Kobeni Solutions - United States
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.

9
Cyber World Internet Services/ e-Insites - United States
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.

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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