nJOY BLOG

2009Sep01

「Yahoo! メール」のスパムフィルタの精度（2009年5月～8月）

過去4ヶ月間に Yahoo! メールに届いたスパムのデータを集計。

スパムメールの観測は長い事やっていますが、6月から受信したスパムの量が目に見えて減っていますね。
スパムフィルターの精度は相変わらずいまいちですが…。

去年11月に大手スパマーがネットから遮断されてガクッと減った事はありますが、3ヶ月連続で500通/月を切ったのは今回が初めてじゃないかな。
ぜひこの調子で減り続けてほしいものです。

スパムメールの件名もざっと流し読みしてみたけれど、これといって目新しいものはありませんでした。でもその中でちょっと目をひいたのが次の一通。

差出人 : FBI DEPARTMENT <info@fbi.gov>
返信先 : remittanceoffice002@yahoo.cn
件名 : UNITED NATIONS ORGANIZATION WORLD RELIEF PAYMENT VIA ATM.

また FBI（連邦捜査局）からです（参考→「FBI からメールが来た」）。

内容は以下の通り

This is to officially inform you that it has come to our notice and we have thoroughly investigated with the help of our Intelligence Monitoring Network System that you are having an illegal Transaction with Impostors claiming to be FEDERAL BUREAU OF INVESTIGATION.

During our Investigation, we noticed that the reason why you have not received your payment is because you are dealing with the wrong person in respect of your Contract/Inheritance Payment.Just this month we recover some amount from fraudulent people in Nigeria with the help of the new government in Nigeria and the total money recover was ,000,000.00 in which the Nigeria government reside to give away the money to an American Citizen with correct social security details as a compensation either unemployed/employed here in the U.S as in accordance with  the new president of America permission , in which your name and address came out and we the U.S. Government Accountability Office (GAO) reside to contact in regards to your claims.

Therefore, we have contacted the Federal Ministry Of Finance on your behalf and they have brought a solution to your problem by coordinating your payment in total USD,000,000.00 in an ATM CARD which you can use to withdraw money from any ATM MACHINE CENTER anywhere in the world with a maximum of ,000 to ,000 United States Dollars daily. You now have the lawful right to claim your fund in an ATM CARD.

Since the U.S. Government Accountability Office (GAO) is involved in this transaction, you have to be rest assured for this is 100% risk free it is our duty to protect the American Citizens. All I want you to do is to contact the FBI AGENT, THAT WAS SENT TO THE ATM CARD INTERNATIONAL REMITTANCE CENTER via email or by phone for their requirements to proceed and procure your Approval Slip on your behalf while the shipment of the ATM CARD is been taken care of once your approval slip is signed and sealed ...

FBI AGENT INFORMATION NAME: Agent Chris Newson
EMAIL: chris.newson46@yahoo.com.hk
TELEPHONE: +23470-26776530  (+1-206-203-4190)

Do contact Agent Chris Newson who was sent on your behalf and many other beneficial s on a mission. with your details and re-confirmed your information

FULL NAME:
HOME ADDRESS:
TELL:
CELL:
BANK NAME:
AGE:
CURRENT OCCUPATION:

We order you get back to this office after you have contacted the ATM SWIFT CARD CENTER and we do await your response so we can move on with our Investigation and make sure your ATM SWIFT CARD gets to you. Thanks and hope to read from you soon.

As soon as we receive your full information, he shall proceed with your fund transfer immediately via ATM card.We anticipate your prompt response. If you need to contact me at any stage please do not hesitate to call (+1-206-203-4190)

The U.S. Government Accountability Office (GAO)
Gene L. Dodaro
GAO Fraud NET
441 G Street NW Mail Stop 4T21
Washington, DC 20548

メールの内容を要約すると「あなたはナイジェリア詐欺で FBI を騙った偽者に騙されたけど、今度こそ本物の FBI がお金を取り戻す事ができたから連絡してくれ」みたいな感じ。

でも返信先のメールアドレスのドメインが yahoo.cn （中国ヤフー）で、FBI 捜査官のメールアドレスのドメインが yahoo.com.hk （香港ヤフー）と怪しすぎ。

詐欺被害者を三重に食いものにしようという事なんでしょうけど、手の込んだ事をするなぁ。