This is a bug fix version
pdfid_v0_2_8.zip (https)MD5: 9DDE1D9010D860303B03F3317DAF07B4
SHA256: 0D0AA12592FA29BC5E7A9C3CFA0AAEBB711CEF373A0AE0AD523723C64C9D02B4
Friday 20 August 2021
Update: pdfid.py Version 0.2.8
MD5: 9DDE1D9010D860303B03F3317DAF07B4
SHA256: 0D0AA12592FA29BC5E7A9C3CFA0AAEBB711CEF373A0AE0AD523723C64C9D02B4
Tuesday 17 August 2021
Update: oledump.py Version 0.0.62
This new version brings a bug fix and an update to plugin_biff’s XOR deobfuscation.
oledump_V0_0_62.zip (https)MD5: F16DB945970B49A60155443ED82CDE29
SHA256: 4AE5DF2CC8E8F5A395027A8056B1A33B8F05C0AB6FC18D56D46DC151BB4302FB
Wednesday 11 August 2021
dnsresolver.py: Videos For Each Command
I did record 8 videos explaining the different commands of my dnsresolver.py tool.
This is a tool that can serve files, facilitate exfiltration, do tracking, answer wildcard requests, do rcode testing and also simple resolving.
I have a YouTube playlist with all 8 videos: dnsresolver playlist.
Saturday 17 July 2021
Update: base64dump.py Version 0.0.16
This new version of base64dump.py brings bug fixes and support for BASE85 RFC 1924 encoding.
If you want to know how I go about adding a new decoding to base64dump.py, watch this video:
Here is version 0.0.0.15, with bug fixes but without base85:
base64dump_V0_0_15.zip (https)MD5: 95C78B0DC830C6240F2A56A3BA0C483F
SHA256: F011136B2CF4F54647AB4B699CE7F3575925B2BD09EED409E4BBE34FEB8C570A
And here is version 0.0.0.16 with base85:
base64dump_V0_0_16.zip (https)MD5: 91E283BDF292C463E349DC535EF50535
SHA256: E85345971D209559ED6602F16C6DBBF526816848B2F15B44C06A7DE7B28F2F8C
Thursday 15 July 2021
New Tool: dnsresolver.py
I’ve done several experiments with DNS, which has lead me over the last couple of years to develop a DNS resolver tool.
By no way is it a full fledged DNS server: it implements particular features that I’ve needed for different experiments I conducted.
It can serve files, facilitate exfiltration, do tracking, answer wildcard requests, do rcode testing and also simple resolving.
Upcoming blog posts will go into more details for some of these features.
MD5: 340C7324EB66EB4F567B38F374DD2564
SHA256: 56AD87585FDCC20C219BF4A27D9640ECD563E4155816990AB4E7B85AAFA5F047
Tuesday 13 July 2021
Update: FileScanner Version 0.0.0.7
This new version of FileScanner brings bug fixes and new features, like UNICODE filename support and an embedded man page.
MD5: D3294BE258F5E2CD9ADF60035D5FB444
SHA256: 8D9349A2056CF400DF55D0407287144A038B6268E40919F248866B4C8BC3FD0A
Monday 5 July 2021
New Tool: texteditor.py
I have some ad hoc tools, that help me with special text editing tasks. Like doing search and replace in a text file, with a list of search and replace terms. Or looking for assignment statements in the source code of a program, and replacing each variable with its value.
I decided to bundle these ad hoc scripts, into a single generic script, a new tool: texteditor.py
Here is an example, take text file example.txt with the following content:
There is an apple on the sun.
It is nice and warm.
And CSV file sar.csv with the following content:
apple,pear
sun,moon
The following sarcsv command edits file example.txt with sar.csv:
./texteditor.py input=example.txt edit=sarcsv,file=sar.csv output=-
The output of this command is:
There is an pear on the moon.
It is nice and warm.
MD5: C8BA3AA8E8549B0159B76CF4A520976B
SHA256: D605DF7560C0CDBDCA3F4C1B1DC11EE9765813149B60D144714CF1C6E92CEC22
Sunday 4 July 2021
Update: xmldump.py Version 0.0.7
This update to xmldump.py, a tool to help with viewing XML files, adds option -j (–jsoninput) to handle JSON output produced by zipdump.py.
With this option, shared strings from OOXML spreadsheets will be used with command celltext.
I will explain more in an upcoming blog post.
MD5: 20FBBC1A053B2528AC4200B917637876
SHA256: 0D7850CEEDEB7EFD9E8645CF8DD59F1912E9EB3C135346F98AF3E3A7BAAE2B68
Monday 21 June 2021
Update: oledump.py Version 0.0.61
This new version of oledump.py comes with Excel 4 formula parsing improvements in the plugin_biff plugin.
oledump_V0_0_61.zip (https)MD5: 6DC34FFAF4ED0066696ED230878AEED9
SHA256: 41A68ABA19BBA74DAE653BE62D4A63A5AE409FB6DC1DAEEB2D419AA1B493728A
Tuesday 15 June 2021
Update: 1768.py Version 0.0.7
There are no code changes to this version of 1768.py, my tool to analyze Cobalt Strike beacons.
What is new, is file 1768.json: this file contains statistical data for license IDs.
Over a period of one month, I collected license ID information from these sources: threatviewio and @cobaltstrikebot.
For each license ID that is found on more than one IP address / hostname, I include simple statistics: the number of unique IP addresses / hostnames and the number of unique public keys.
When analyzing malicious Cobalt Strike beacons, I often see recurring license IDs. That’s why I decided to add logic and a JSON file to my tool, with license IDs I’ve seen before. And now this has evolved to a small repository of often seen license IDs.
Here is an example with a sample we discussed on the Internet Storm Center diary:
The license ID is 1873433027 and this ID is associated with 18 unique IP addresses / hostnames, and 15 unique public keys. This is a clear indication that this license ID is used by malicious actors. License IDs that have been seen only once, could belong to red teams, that is why they are not included in file 1768.json. The more often a license ID is seen, the higher the chance it is used by malicious actors. Of course, it is not excluded that there are legitimate license IDs from red teams in this list, but I expect they will have low frequencies.
Takeaway: if your sample has a license ID that appears in 1768.json, then it has been seen before (at least twice), and you’re likely not dealing with a pentest.
1768_v0_0_7.zip (https)MD5: D93AC5707FD0B5315A1225121071C7F2
SHA256: B417790451681643B2269AC516A99F3CEE9F7F374AB529FD53D5702A70F79409
Didier Stevens 