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Didier Stevens

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Last Build Date: Thu, 23 Nov 2017 15:29:37 +0000


Update: Version 0.0.2didierstevens

Mon, 20 Nov 2017 00:00:01 +0000 is a program to rename pcap files with the timestamp of the first packet in the pcap file. This new version supports big-endian pcap files. (https) MD5: 6EFFA5313946DEAF3363835B1D3C684E SHA256: 3BA23CC936B49AF83306E486B0BFC9ABAF5BD0B5E3DEF81D8564BCC3810C06B9(image)

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WebDAV Traffic To Malicious Sitesdidierstevens

Mon, 13 Nov 2017 00:00:41 +0000

If observed WebDAV traffic to malicious sites in the past (in proxy logs), and recently I took some time to take a closer look. TL;DR: when files are retrieved remotely with the file:// URI scheme on Windows, Windows will fallback to WebDAV when SMB connections can not be established. I did my tests with 2 […](image)

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Update: Version 0.0.3didierstevens

Fri, 10 Nov 2017 22:56:39 +0000

This version has a man page now. I use this tool to decode obfuscated strings in malicious scripts: Usage: [options] [expression [[@]file ...]] Program to convert numbers into a string Arguments: @file: process each file listed in the text file specified wildcards are supported Source code put in the public domain by Didier Stevens, […](image)

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Update: Version 0.0.30didierstevens

Mon, 06 Nov 2017 00:00:16 +0000

This new version of detects and analyses orphaned streams. More info on orphaned streams can be found in this blogpost. (https) MD5: BBD53C65FC40891E2125B9808F507E4A SHA256: 78CDC8C8BCD651A3578F567D24FD88300600E02520B2D75F45448E4FB480FEB0(image)

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Update: Version 0.7.1didierstevens

Sun, 05 Nov 2017 00:00:11 +0000

This new version of adds support for option -g to select a section: (https) MD5: D5907442424C527A9937CFA65377C9BD SHA256: BF2F162D108F17F350111645B8DFFE5D3641065CB6EE3CE318FCBEC83507917B(image)

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Update: Version 0.0.6didierstevens

Sat, 04 Nov 2017 00:00:09 +0000

This new version of brings a small cosmetic change to the way a hex/ASCII dump is displayed: An extra space is added between the 8th and 9th byte of the hexdump. This was suggested to me by an attendee of the last private training I gave. (https) MD5: 7F726219F6F601018B4BD39E9A407728 SHA256: BFD80EF00455CD938A05A18EAA33551ABEC6B0298A0AEE81052E6F5A12BB86F7(image)

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Update: Version 0.0.7didierstevens

Fri, 03 Nov 2017 20:59:41 +0000

My tool calculates statistics for the files it analyzes. With option -l (and -p) , it produces a list of values for different parts of the file (buckets), for example a list of entropy values. With this, one can have an idea how the entropy changes inside a file. But as the saying goes, […](image)

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Analyzing Metasploit’s Office Maldocdidierstevens

Thu, 02 Nov 2017 00:00:40 +0000

Metasploit has a module to create Microsoft Word document with macros (.docm): office_word_macro. Documents generated with this module are not that hard to analyze and detect, because they always use the same VBA code. As I explain in my workshops and trainings, although the “new” Office file format (OOXML) is a ZIP container for XML […](image)

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Overview of Content Published In Octoberdidierstevens

Wed, 01 Nov 2017 00:00:17 +0000

Here is an overview of content I published in October: Blog posts: Quickpost: Mimikatz DCSync Detection Update: Version 0.0.29 Update: Version 0.0.8 Update: Version 0.6.8 Update: Version 0.2.2 Analyzing A Malicious Document Cleaned By Anti-Virus SANS ISC Diary entries: A strange JPEG file Peeking into .msg files It’s in the signature. […](image)

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Analyzing A Malicious Document Cleaned By Anti-Virusdidierstevens

Tue, 31 Oct 2017 00:00:08 +0000

@futex90 shared a sample with me detected by many anti-virus programs on VirusTotal but, according to, without VBA macros: I’ve seen this once before: this is a malicious document that has been cleaned by an anti-virus program. The macros have been disabled by orphaning the streams containing macros, just like when a file is […](image)

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