IRC clue 4

November 4th, 2012
After user Gunsrequiem heroically solved Code D and the ingame portion of the The Pizza Code Mystery, the watcher reappeared. [14:59] * watcher_ (webchat@host-84-9-122-177.dslgb.com) has joined #BMS-ARG [15:01]  UHJveHlob3N0QC04NC05LTEyMy0xNjQuZHNsZ2IuY29tLy9jbG9zZWQucHJveHkuYWNjZXB0ZWQvLz9PVFIsMSwzLD9PVFI6W0ktLS1NSS1HIFRSLS1TTUktLS1PTiAtIFVOLS0tV04gUyMjUkNFXUF [15:01]  jY2VzcyBkZXRlY3RlZCB0byBwZXJzb25hbCBzaXRlLiAKU2VjdXJpdHkgY29tcHJvbWlzZWQuCkhBTE9TIHByb2plY3QgdW5kZXIgdGhyZWF0LiBTaXRlIG9mZmxpbmUgYXMgcmVzcG9uc2UuIFN3aX [15:01]  RjaGluZyB0byBuZXcgcHJvdG9jb2xzLlsqKioqKioqKl0gfltPVFIvLzIuMF1RMEZaUlVsTVZFaEVXa1ZJVkVoQlRscEpSVlJMU1U1T1FVRlRWRk5QVQowbENTVk5QUkVsSVZFaEJUbHBKUlVSYVJVa [15:01]  FVTMGxPVjA5TVRFRkRTRVZGUkVsQ1JVaFVTRUZPV2tsRlEwRlpSVWxNVkVoRVdrVklSRWxDUlVoVVNFRk9Xa2xGVGtGQlUxUlRUMU5KVGs5RVFVbApJVkVoQlRscEpSVTFCUlU1QlFWTlVVMDlUU1Vk [15:01]  QlNGUkxTVTVPUlVGVFNFcFRUbFJJUVU1YVNVVUtSRWxDUlVoWlFWcGFTVXhKVGxOSVZWTklSRnBGU0V0TVNWcGFTVVZPUlZOSVEwaEZSVU5CV1VWSlRGUklTMHhKV2xwSlJWbEJXbHBKUjBGSVUwaFZ [15:01]  VMGhDUlVSSlFrClZJV1VGYVdrbFRTRlZUU0VKSlUwOUVTVWhPVDBSQlNVZz1bL11+CltUcmFuc21pc3Npb24gRW5kc10= [15:02] * watcher_ (webchat@host-84-9-122-177.dslgb.com) Quit (Quit: Page closed)

User faed noticed that it was base64, like the previous IRC clues. Proxyhost@-84-9-123-164.dslgb.com//closed.proxy.accepted//?OTR,1,3,?OTR:[I---MI-G TR--SMI---ON - UN---WN S##RCE]Access detected to personal site. Security compromised. HALOS project under threat. Site offline as response. Switching to new protocols.[********] ~[OTR//2.0]Q0FZRUlMVEhEWkVIVEhBTlpJRVRLSU5OQUFTVFNPU 0lCSVNPRElIVEhBTlpJRURaRUhUS0lOV09MTEFDSEVFRElCRUhUSEFOWklFQ0FZRUlMVEhEWkVIRElCRUhUSEFOWklFTkFBU1RTT1NJTk9EQUl IVEhBTlpJRU1BRU5BQVNUU09TSUdBSFRLSU5ORUFTSEpTTlRIQU5aSUUKRElCRUhZQVpaSUxJTlNIVVNIRFpFSEtMSVpaSUVORVNIQ0hFRUNBWUVJTFRIS0xJWlpJRVlBWlpJR0FIU0hVU0hCRURJQk VIWUFaWklTSFVTSEJJU09ESUhOT0RBSUg=[/]~ [Transmission Ends]

Which contains another base64 message, but it needs another step to decrypt: CAYEILTHDZEHTHANZIETKINNAASTSOSIBISODIHTHANZIEDZEHTKINWOLLACHEEDIBEHTHANZIECAYEILTHDZEHDIBEHTHANZIENAASTSOSINODAIHTHANZIEMAENAASTSOSIGAHTKINNEASHJSNTHANZIE DIBEHYAZZILINSHUSHDZEHKLIZZIENESHCHEECAYEILTHKLIZZIEYAZZIGAHSHUSHBEDIBEHYAZZISHUSHBISODIHNODAIH

Word repetitions are quickly discovered, and user pointless found that it is the Navajo Code Talkers' Dictionary used during in WWII.

QETIMPTEIASTQESTMUTFMRIOTLHBEGNQKRBDLBPU

User MadDoctor put the resulting Navajo code into a playfair decoder (key: TERMINAL) and found the final solution.

PRIMESITECOMPROMISEDRETURNBMRFLOGINHALOS

SOLUTION
"Prime site compromised. Return BMRF, login HALOS."