03-20-2016
Hi.
Regarding email enclosures and attachments, from a recent security newsletter:
--Malicious Macros in Word Documents
(March 14, 2016)
Malicious macros embedded in Word documents are increasingly being used
as an attack vector. Researchers have now found a variant in which the
documents use fileless malware; in other words, they place malware
directly into the device's memory. The attack was delivered through
targeted spam that contains a malicious document. If the macros are
permitted to run, they use PowerShell to gather information about the
computer. The malware looks for machines where financial transactions
are conducted.
This is a reason I don't look at emails that contain Word, Excel, etc. documents. The OP may be comfortable looking at such email from himself or colleagues, but I would not be. Text is, in my opinion, the best and only kind of attachment allowed.
Best wishes ... cheers, drl
This User Gave Thanks to drl For This Post:
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LEARN ABOUT OPENSOLARIS
doc
DOC(4) Kernel Interfaces Manual DOC(4)
NAME
DOC - (Pilot standard text document) file format
SYNOPSIS
struct doc_record0 { /* 16 bytes total */
Word version; /* 1 = plain text, 2 = compressed text */
Word reserved1;
DWord doc_size; /* uncompressed size in bytes */
Word num_recs; /* not counting itself */
Word rec_size; /* in bytes: usually 4096 (4K) */
DWord reserved2;
};
DESCRIPTION
The Doc file format is the standard text document format used by all models of the Palm Pilot. A Doc file is a pdb(4) file: this manual
page describes only those aspects specific to Doc files.
A Doc file consists of 0 to num_recs records; record 0 is the header for the document. (This header is distinct from the pdb(4) header.)
The remaining records contain text, either plain or compressed depending upon version.
Word Sizes
In the synopsis above, the types ``Word'' and ``DWord'' are used just as in the Pilot headers. The type ``Word'' is 16 bits; the type
``DWord'' is 32 bits. Both are in big-endian format.
Compression Format
A character ``c'' in a compressed record is in one of four classes:
01-08 Copy ``c'' bytes
00,09-7F Self
80-BF Sequence
C0-FF A space plus the ASCII character ``c ^ 0x80''
SEE ALSO
txt2pdbdoc(1), html2pdbtxt(1), pdbtxt2html(1), pdb(4)
Christopher Bey and Kathleen Dupre. Palm File Format Specification, Document Number 3008-003, Palm, Inc., May 16, 2000.
AUTHOR
Paul J. Lucas <pauljlucas@mac.com>
txt2pdbdoc January 21, 2005 DOC(4)