Me pasó lo mismo y ya lo he arreglado:
Como remover vbs:Malware-gen gzip do blog - Dicas de Informática e Games
Buscá en la plantilla de tu tema esto:
function rp(json){document.write('<ul>');for(var i=0;i<numposts;i++){document.write('<li>');var entry=json.feed.entry
;var posttitle=entry.title.$t;var posturl;if(i==json.feed.entry.length)break;for(var k=0;k<entry.link.length;k++){if(entry.link[k].rel=='alternate'){posturl=entry.link[k].href;break}}posttitle=posttitle.link(posturl);var readmorelink="(more)";readmorelink=readmorelink.link(posturl);var postdate=entry.published.$t;var cdyear=postdate.substring(0,4);var cdmonth=postdate.substring(5,7);var cdday=postdate.substring(8,10);var monthnames=new Array();monthnames[1]="Jan";monthnames[2]="Feb";monthnames[3]="Mar";monthnames[4]="Apr";monthnames[5]="May";monthnames[6]="Jun";monthnames[7]="Jul";monthnames[8]="Aug";monthnames[9]="Sep";monthnames[10]="Oct";monthnames[11]="Nov";monthnames[12]="Dec";if("content"in entry){var postcontent=entry.content.$t}else if("summary"in entry){var postcontent=entry.summary.$t}else var postcontent="";var re=/<\S[^>]*>/g;postcontent=postcontent.replace(re,"");document.write(posttitle);if(showpostdate==true)document.write(' - '+monthnames[parseInt(cdmonth,10)]+' '+cdday);if(showpostsummary==true){if(postcontent.length<numchars){document.write(postcontent)}else{postcontent=postcontent.substring(0,numchars);var quoteEnd=postcontent.lastIndexOf(" ");postcontent=postcontent.substring(0,quoteEnd);document.write(postcontent+'...'+readmorelink)}}document.write('</li>')}document.write('</ul>')}
Borralo todo, y ya está. Parece que es un código que meten en algunos temas de blogger.