Didier Stevens

Tuesday 10 January 2017

Overview of Content Published In December

Filed under: Announcement — Didier Stevens @ 0:00

Here is an overview of content I published in December:

Blog posts:

YouTube videos:

Videoblog posts:

SANS ISC Diary entries:

NVISO Labs blog posts:

Wednesday 28 December 2016

Update: pdf-parser Version 0.6.7

Filed under: My Software,PDF,Update — Didier Stevens @ 12:03

I added option -k to search for keys in dictionaries. A usage example can be found in blog post “PDF Analysis: Back To Basics“.

pdf-parser_V0_6_7.zip (https)
MD5: D04D7DA42F3263139BC2C7E7B2621C91
SHA256: ED863DE952A5096FF4BE0825110D2726BA1BE75A7A6717AF0E6A153B843E3B78

Friday 16 December 2016

Hancitor Maldoc Videos

Filed under: maldoc,Malware — Didier Stevens @ 0:00

I produced 4 videos covering the process hollowing maldoc “Maldoc With Process Hollowing Shellcode“.

 

Wednesday 14 December 2016

Update: pecheck.py Version 0.6.0 – Overview Of Resources

Filed under: Malware,My Software,Update — Didier Stevens @ 0:00

This new version can produce a compact overview of all the resources in a PE file using option o: -o r.  Here is the overview of resources in an exe (malware) created with iexpress:

20161213-215750

It contains a cab file with 2 executables, which are executed after extraction (no surprise):

20161213-220001

pecheck-v0_6_0.zip (https)
MD5: D3A9C71AAF63D83884B4FEF2C2C21D03
SHA256: 08DB82F190AEEB065A65FEE0DD03D20B0CC788878C4864B537BBD1807E4D6B71

Monday 12 December 2016

Update: oledump.py Version 0.0.26

Filed under: My Software,Update — Didier Stevens @ 0:00

Just a small change in this version: an indicator (O) for streams containing OLE 1.0 embedded data:

20161211-203401

And plugin_http_heuristics also detects XOR-encoding starting with the second character of the key.

oledump_V0_0_26.zip (https)
MD5: 62030DEC6DBC2F69A37893FF1624F8EE
SHA256: A0DE8FD414A0B78FE8D72CAA58D8FA15159A7ABEA9842181C4C3C4EC1DE2EEC5

Friday 9 December 2016

Update: pecheck.py Version 0.5.2

Filed under: My Software,Update — Didier Stevens @ 0:00

This new version displays information about the signature (provided pyasn1 is installed), and adds option -g to extract data (pefile.get_data) from the pefile like resources.

Options -x, -a, -D and -S can be used to dump data (hex, ascii, binary and strings).

pecheck-v0_5_2.zip (https)
MD5: A4FF0507C206535FA9224F65CCD3497D
SHA256: DE4D06F00FD9EC74FD52689B711FBF10F953F14DAFACBDE214E0A4947E60D8A6

Tuesday 6 December 2016

Overview of Content Published In November

Filed under: Announcement — Didier Stevens @ 0:00

Here is an overview of content I published in November:

Blog posts:

YouTube videos:

Videoblog posts:

SANS ISC Diary entries:

NVISO Labs blog posts:

Monday 28 November 2016

Update: pdf-parser Version 0.6.6

Filed under: Uncategorized — Didier Stevens @ 0:00

This new version of pdf-parser is a bugfix for /FLATEDECODE.

pdf-parser_V0_6_6.zip (https)
MD5: 47326468E1B5A1AF7BB8AD63688804D9
SHA256: 51C9B25B939B135D9949E51463F58ECEC0BEBEFB9C0EAA0B93326CBFB4D8F061

Sunday 27 November 2016

Update: xor-kpa.py Version 0.0.4

Filed under: Encryption,My Software,Update — Didier Stevens @ 0:00

This new version of xor-kpa adds the option -x to encode/decode, and also prints the hexadecimal value of the found keys.

xor-kpa_V0_0_4.zip (https)
MD5: FCE75B6125104D8AFC56A67B65FF75C0
SHA256: 3DCCA479D4C8CAC9B248B24F799184A69D0F10403593CB002248DD35CCE60FD4

Tuesday 22 November 2016

Simple Ciphers: cipher-tool.py

Filed under: Encryption,My Software — Didier Stevens @ 0:00

When I left my last position, my friends and colleagues with whom I’ve worked for years gave me a little challenge: a PDF with a hidden ciphertext. At first I had to use Excel to decipher the ciphertext, but later I wrote a small Python tool to help me.

The simple ciphers supported by this tool are XOR, ROT, Vigenère and subtract (I added that last one because it was used in a maldoc). You can use the man page (option -m) to learn more.

cipher-tool_V0_0_1.zip (https)
MD5: B7D44090A76F66D7194D0A0D890E2CEB
SHA256: 1E8E1F112595FC08C3C20A06D172C21DDE6375EC8651A8DE6EF57B938F3E67E8

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