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class="p-article_header_title">丹青社のなりすましメール、委託先のサーバーが不正アクセスを受け個人情報流出も</h1> <div class="p-article_header_meta -typeB"> <div class="p-article_header_author"> <div class="p-article_header_author_profile"> <div class="p-article_header_author_name"><address class="p-article_header_author_fullName"><a href="/search/?KEYWORD=piyokango&author=1">piyokango</a></address></div> <div class="p-article_header_author_level">セキュリティーリサーチャー</div> </div> </div> <div class="p-article_header_info"> <time class="p-article_header_date" datetime="2024-01-09">2024.01.09</time> </div> </div><div class="p-article_action"> <ul class="socialButtons p-article_action_group -social"> <li class="p-article_action_btn"><a class="p-article_action_btn_square -facebook" href="#" onclick="window.open('https://www.facebook.com/dialog/share?app_id=517948118584012&display=popup&href=https://xtech.nikkei.com/atcl/nxt/column/18/00598/100500247/?n_cid=nbpnxt_fbbn', 'snsWindow', 'width=500, height=500, menubar=no, toolbar=no, 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<script type="text/javascript"> googletag.cmd.push(function() { googletag.display('div-gpt-ad-category_textad_leaf_top_02'); }); </script> </div> </li><li> <div id="div-gpt-ad-category_textad_leaf_top_03"> <script type="text/javascript"> googletag.cmd.push(function() { googletag.display('div-gpt-ad-category_textad_leaf_top_03'); }); </script> </div> </li></ul> </div> <div class="bpbox"> <div class="bpbox_text"> <p> 著名なセキュリティーリサーチャーのpiyokango氏が注目のシステムトラブルをピックアップ。今週の注目ネタは……。 </p> </div> </div> <p> 　今回取り上げるシステムトラブルは、丹青社の委託先への不正アクセスと、不正アクセス被害に遭った紀伊國屋書店に業務を委託していた富士山マガジンサービスの影響、ミニストップの個人情報漏洩である。 </p> <h4> IRニュースの配信サーバーに不正アクセス </h4> <p> 　博物館や催事などの展示物制作を手掛ける丹青社は2023年12月20日、投資家向け広報（IR）メールを配信していたサーバーが不正アクセスを受けたと発表した。IRメールの配信は外部の企業に委託していた。 </p> <div class="bpbox_center"> <div class="bpimage_center" style="width:400px;"><div class="bpimage_image"><a href="/atcl/nxt/column/18/00598/100500247/?SS=imgview&FD=-1041774028" target="_blank"><img src="https://cdn-xtech.nikkei.com/atcl/nxt/column/18/00598/100500247/p1.jpg?__scale=w:400,h:510&_sh=0140c806b0" width="400" height="510" alt="（出所：丹青社）"></a></div> <div class="bpimage_caption">（出所：丹青社）</div><div class="bpimage_click">[画像のクリックで拡大表示]</div></div> </div> <p> 　不正アクセスにより、株主や投資家、顧客、従業員のメールアドレス641件が外部に流出した。さらに、同社のメールアドレスに偽装したなりすましメールが多数配信された。 </p> <p> 　同社は2023年10月30日、なりすましメールの配信が確認されたとして、注意喚起を出していた。同日、警視庁サイバー犯罪対策課から委託先サーバーが乗っ取られている可能性の指摘を受け、同社ドメインのメールが配信されないよう対処した。 </p> <p> 　対処を行った後、同様の事象は発生していないと説明。同社は委託先を別の企業に変更した。今回の情報漏洩を受け個人情報の管理体制に関し一層の強化を図っていくとしている。 </p> <span class="bpLayoutLink block"> <span><a href="https://www.tanseisha.co.jp/news/info/2023/post-50510" target="_blank">https://www.tanseisha.co.jp/news/info/2023/post-50510</a></span> </span>  <div id="div-gpt-ad-inread"> <script type="text/javascript"> googletag.cmd.push(function() { googletag.display('div-gpt-ad-inread'); }); </script> </div><nav class="pagenation p-pagenation"> <p 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