OVERSIZE REQUEST-URI DIRECTORY outbound from my network

[CasperLinux <CasperLinux () comcast net>]

I admit I'm new at this security evaluation - at least in this detail.  I 
asked a couple of days ago about the OVERSIZE REQUEST-URI DIRECTORY hits I 
was getting from external to internal networks.  I posted the payload and was 
advised (by Joel I believe) that this is evidence of "typical" virus 
activity.  

However, since yesterday I have been seeing this same hit originating on my 
family box (WinXP) and heading outbound.  In two separate views I see within 
the payload data that makes me think they are legitimate transactions.  Below 
is the latest from this morning and is tied to a use by my daughter of 
mapquest.  I'm gonna scan the heck out of that computer but can someone 
explain this to me (or better yet - point me to a web reference where I can 
read and learn some more) about this problem and what it really means?  I've 
searched and simply can't find enough to understand what this is trying to 
tell me.

000 : 47 45 54 20 2F 3F 65 3D 39 26 47 65 74 4D 61 70   GET /?e=9&GetMap
010 : 44 69 72 65 63 74 3D 47 6D 65 35 64 69 77 25 32   Direct=Gme5diw%2
020 : 63 62 25 33 61 39 75 31 32 25 33 62 25 34 30 25   cb%3a9u12%3b%40%
030 : 32 34 78 75 25 32 64 37 67 31 66 37 32 25 32 36   24xu%2d7g1f72%26
040 : 25 33 64 79 6E 25 32 31 7A 31 35 30 36 37 25 33   %3dyn%21z15067%3
050 : 61 39 36 25 34 30 61 6C 79 32 6E 39 25 34 30 79   a96%40aly2n9%40y
060 : 25 32 36 39 72 37 73 64 34 25 32 34 78 75 72 37   %269r7sd4%24xur7
070 : 6E 25 32 36 75 32 67 75 25 32 63 61 25 33 61 39   n%26u2gu%2ca%3a9
080 : 36 37 32 25 33 62 25 34 30 62 32 30 30 25 32 34   672%3b%40b200%24
090 : 25 33 61 25 32 36 25 34 30 25 32 34 78 75 25 32   %3a%26%40%24xu%2
0a0 : 64 37 61 39 79 37 32 25 32 36 25 33 64 79 6E 25   d7a9y72%26%3dyn%
0b0 : 32 31 7A 7A 73 39 36 37 25 33 61 25 32 36 25 34   21zzs967%3a%26%4
0c0 : 30 32 32 75 36 25 32 61 25 33 61 6C 36 74 78 25   022u6%2a%3al6tx%
0d0 : 32 36 25 34 30 25 32 34 25 33 61 25 32 36 61 37   26%40%24%3a%26a7
0e0 : 25 32 36 75 66 74 67 75 36 25 32 34 25 32 65 35   %26uftgu6%24%2e5
0f0 : 75 25 34 30 67 31 61 32 32 75 25 34 30 25 32 34   u%40g1a22u%40%24
100 : 25 33 61 39 34 74 77 25 33 62 75 25 32 34 6E 64   %3a94tw%3bu%24nd
110 : 7A 37 25 32 36 31 25 32 63 62 73 35 72 25 32 34   z7%261%2cbs5r%24
120 : 25 33 61 25 32 36 75 7A 32 25 32 36 75 7A 32 30   %3a%26uz2%26uz20
130 : 72 38 78 71 25 34 30 32 30 30 25 34 30 25 32 34   r8xq%40200%40%24
140 : 6E 64 77 37 25 32 36 31 25 32 63 79 35 25 32 36   ndw7%261%2cy5%26
150 : 77 25 32 34 78 75 36 74 6E 64 25 34 30 25 35 66   w%24xu6tnd%40%5f
160 : 67 39 7A 7A 73 31 25 34 30 25 35 66 6C 25 32 36   g9zzs1%40%5fl%26
170 : 36 25 32 34 25 32 65 68 25 34 30 25 35 66 77 25   6%24%2eh%40%5fw%
180 : 32 36 25 33 64 61 25 33 61 75 25 34 30 25 35 66   26%3da%3au%40%5f
190 : 30 25 32 36 25 33 64 32 25 33 61 25 32 39 75 7A   0%26%3d2%3a%29uz
1a0 : 25 33 61 25 32 39 79 25 32 34 6E 25 32 36 25 33   %3a%29y%24n%26%3
1b0 : 64 61 25 33 61 67 25 34 30 25 35 66 6E 67 25 34   da%3ag%40%5fng%4
1c0 : 30 61 25 33 61 25 32 39 77 25 32 34 32 25 32 36   0a%3a%29w%242%26
1d0 : 25 33 64 32 25 33 61 71 25 34 30 25 35 66 30 25   %3d2%3aq%40%5f0%
1e0 : 32 36 61 25 32 34 25 32 65 64 25 34 30 74 25 33   26a%24%2ed%40t%3
1f0 : 61 25 32 39 75 37 25 33 61 39 25 34 30 25 35 66   a%29u7%3a9%40%5f
200 : 6C 25 32 36 61 74 25 33 61 25 32 39 34 31 25 33   l%26at%3a%2941%3
210 : 61 39 25 34 30 25 35 66 78 25 32 36 75 25 32 34   a9%40%5fx%26u%24
220 : 25 32 65 31 25 34 30 62 25 33 61 25 32 39 66 25   %2e1%40b%3a%29f%
230 : 32 34 6C 25 32 36 25 33 64 32 6C 25 32 36 36 25   24l%26%3d2l%266%
240 : 32 34 25 32 65 39 36 25 32 34 32 25 32 36 25 33   24%2e96%242%26%3
250 : 64 32 25 33 61 6C 25 34 30 25 35 66 73 75 25 34   d2%3al%40%5fsu%4
260 : 30 37 25 33 61 25 32 39 77 25 32 34 6E 25 32 36   07%3a%29w%24n%26
270 : 25 33 64 79 25 33 61 39 25 34 30 25 35 66 6E 75   %3dy%3a9%40%5fnu
280 : 25 34 30 37 25 33 61 25 32 39 30 25 32 34 6E 25   %407%3a%290%24n%
290 : 32 36 25 33 64 32 78 25 32 36 61 25 32 34 25 32   26%3d2x%26a%24%2
2a0 : 65 6C 61 25 32 34 32 25 32 36 25 33 64 32 25 33   ela%242%26%3d2%3
2b0 : 61 31 25 34 30 25 35 66 6E 67 25 34 30 37 25 33   a1%40%5fng%407%3
2c0 : 61 25 32 39 61 25 32 34 6E 25 32 36 25 33 64 32   a%29a%24n%26%3d2
2d0 : 6E 25 32 36 36 25 32 34 25 32 65 31 25 34 30 72   n%266%24%2e1%40r
2e0 : 25 33 61 25 32 39 61 74 25 33 61 75 25 34 30 25   %3a%29at%3au%40%
2f0 : 35 66 6E 25 32 36 61 25 32 34 25 32 65 31 34 25   5fn%26a%24%2e14%
300 : 32 34 32 25 32 36 25 33 64 62 25 33 61 31 25 34   242%26%3db%3a1%4
310 : 30 25 35 66 6E 68 25 34 30 37 25 33 61 25 32 39   0%5fnh%407%3a%29
320 : 75 25 32 34 6E 25 32 36 25 33 64 32 32 25 32 36   u%24n%26%3d22%26
330 : 30 25 32 34 25 32 65 30 25 34 30 38 25 33 61 25   0%24%2e0%408%3a%
340 : 32 39 75 37 25 33 61 6C 25 34 30 25 35 66 30 25   29u7%3al%40%5f0%
350 : 32 36 30 25 32 34 25 32 65 39 25 34 30 32 25 33   260%24%2e9%402%3
360 : 61 25 32 39 75 25 32 34 67 25 32 36 25 33 64 74   a%29u%24g%26%3dt
370 : 25 33 61 64 25 34 30 25 35 66 6C 25 32 36 77 25   %3ad%40%5fl%26w%
380 : 32 34 25 32 65 39 25 34 30 32 32 25 32 36 25 33   24%2e9%4022%26%3
390 : 64 32 25 33 61 39 25 34 30 37 25 33 61 31 25 34   d2%3a9%407%3a1%4
3a0 : 30 37 25 33 61 39 75 25 32 34 25 32 65 39 25 34   07%3a9u%24%2e9%4
3b0 : 30 32 6E 25 32 36 36 25 32 34 6E 30 25 34 30 37   02n%266%24n0%407
3c0 : 25 33 61 31 36 25 32 34 32 25 32 36 30 25 32 34   %3a16%242%260%24
3d0 : 32 25 32 36 75 7A 25 33 61 25 32 39 75 25 32 34   2%26uz%3a%29u%24
3e0 : 6E 71 25 34 30 37 25 33 61 31 25 34 30 37 25 33   nq%407%3a1%407%3
3f0 : 61 6C 77 25 32 34 32 25 32 36 75 25 32 34 32 25   alw%242%26u%242%
400 : 32 36 75 32 25 33 61 25 32 39 75 25 32 34 6C 25   26u2%3a%29u%24l%
410 : 32 36 36 25 32 34 6E 6C 25 34 30 37 25 33 61 25   266%24nl%407%3a%
420 : 32 39 61 25 32 34 25 32 65 64 25 34 30 25 35 66   29a%24%2ed%40%5f
430 : 6E 25 32 36 25 33 64 62 25 33 61 75 25 34 30 25   n%26%3db%3au%40%
440 : 35 66 6E 25 32 36 25 33 64 32 25 33 61 25 32 39   5fn%26%3d2%3a%29
450 : 30 25 32 34 25 32 65 39 25 34 30 25 35 66 77 25   0%24%2e9%40%5fw%
460 : 32 36 36 25 32 34 25 32 65 39 25 34 30 37 25 33   266%24%2e9%407%3
470 : 61 25 32 39 30 25 32 34 32 25 32 36 25 33 64 7A   a%290%242%26%3dz
480 : 25 33 61 75 25 34 30 25 35 66 6C 25 32 36 36 25   %3au%40%5fl%266%
490 : 32 34 25 32 65 39 30 25 32 34 32 25 32 36 25 33   24%2e90%242%26%3
4a0 : 64 61 25 33 61 25 32 39 75 25 32 34 25 32 65 71   da%3a%29u%24%2eq
4b0 : 7A 25 32 34 32 25 32 36 25 33 64 62 25 33 61 75   z%242%26%3db%3au
4c0 : 25 34 30 25 35 66 6C 31 25 34 30 37 25 33 61 25   %40%5fl1%407%3a%
4d0 : 32 39 30 25 32 34 32 25 32 36 25 33 64 61 78 25   290%242%26%3dax%
4e0 : 32 36 75 72 25 33 61 25 32 39 75 25 32 34 32 25   26ur%3a%29u%242%
4f0 : 32 36 7A 25 32 34 6C 25 32 36 30 25 32 34 6C 25   26z%24l%260%24l%
500 : 32 36 36 25 32 34 6E 64 34 37 25 37 63 75 25 34   266%24nd47%7cu%4
510 : 30 32 35 75 36 25 34 30 6C 25 33 62 25 34 30 7A   025u6%40l%3b%40z
520 : 61 75 61 25 32 34 25 33 61 20 48 54 54 50 2F 31   aua%24%3a HTTP/1
530 : 2E 31 0D 0A 41 63 63 65 70 74 3A 20 2A 2F 2A 0D   .1..Accept: */*.
540 : 0A 52 65 66 65 72 65 72 3A 20 68 74 74 70 3A 2F   .Referer: http:/
550 : 2F 77 77 77 2E 6D 61 70 71 75 65 73 74 2E 63 6F   /www.mapquest.co
560 : 6D 2F 64 69 72 65 63 74 69 6F 6E 73 2F 6D 61 69   m/directions/mai
570 : 6E 2E 61 64 70 3F 67 6F 3D 31 26 64 6F 3D 6E 77   n.adp?go=1&do=nw
580 : 26 72 6D 6D 3D 31 26 31 67 69 3D 30 26 75 6E 3D   &rmm=1&1gi=0&un=
590 : 6D 26 31 64 61 3D 2D 31 2E 30 30 30 30 30 30 26   m&1da=-1.000000&
5a0 : 31 72 63 3D 4C 31 41 41 41 26 63 6C 3D 45 4E 26   1rc=L1AAA&cl=EN&
5b0 : 63 74 3D 4E                                       ct=N


-- 
Don
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