Folks... the file "latestpics.tgz" is definitely up to no good, or at least wants to appear that it is up to no good. When unarchived, the file appears to be a JPEG file because someone pasted the image of a JPEG file onto the file.
The file is actually a Unix executable, with routines such as:
_infect:
_infectApps:
_installHooks:
_copySelf:
I have not looked at it in complete detail yet, but it does indeed appear to be opening files, changing file attributes, and potentially doing damage.
DO NOT DOWNLOAD OR RUN THIS FILE
I will be looking into it further; if you are a programmer, attached is the disassembly of the executable (it's just a plain text file) for your reading pleasure.
It XOR's the static string data stored in it, which is why it doesn't appear to have any string constants. It's definitely trying to mask what it is doing. More later.
I will post updates here:
http://www.ambrosiasw.com/forums/index.php?showtopic=102379