April 2019

@night 1803 access accessdata active directory admissibility ads aduc aim aix ajax alex levinson alissa torres amcache analysis anjp anssi answer key antiforensics apfs appcompat appcompatflags applocker april fools argparse arman gungor arsenal artifact extractor attachments attacker tools austin automating automation awards aws azure azuread back to basics backstage bam base16 best finds beta bias bitcoin bitlocker blackbag blackberry enterprise server blackhat blacklight blade blanche lagny book book review brute force bsides bulk extractor c2 carved carving case ccdc cd burning ceic cfp challenge champlain chat logs Christmas Christmas eve chrome cit client info cloud forensics command line computer forensics computername conference schedule consulting contest cool tools. tips copy and paste coreanalytics cortana court approved credentials cryptocurrency ctf cti summit cut and paste cyberbox Daily Blog dbir deep freeze defcon defender ata deviceclasses dfa dfir dfir automation dfir exposed dfir in 120 seconds dfir indepth dfir review dfir summit dfir wizard dfrws dfvfs dingo stole my baby directories directory dirty file system disablelastaccess discount download dropbox dvd burning e01 elastic search elcomsoft elevated email recovery email searching emdmgmt Encyclopedia Forensica enfuse eric huber es eshandler esxi evalexperience event log event logs evidence execution exfat ext3 ext4 extended mapi external drives f-response factory access mode false positive fat fde firefox for408 for498 for500 for526 for668 forenisc toolkit forensic 4cast forensic lunch forensic soundness forensic tips fraud free fsutil ftk ftk 2 full disk encryption future gcfe gcp github go bag golden ticket google gsuite guardduty gui hackthebox hal pomeranz hashlib hfs honeypot honeypots how does it work how i use it how to howto IE10 imaging incident response indepth information theft infosec pro guide intern internetusername Interview ios ip theft iphone ir itunes encrypted backups jailbreak jeddah jessica hyde joe sylve journals json jump lists kali kape kevin stokes kibana knowledgec korman labs lance mueller last access last logon lateral movement leanpub libtsk libvshadow linux linux forensics linux-3g live systems lnk files log analysis log2timeline login logs london love notes lznt1 mac mac_apt macmini magnet magnet user summit magnet virtual summit mari degrazia mathias fuchs md viewer memorial day memory forensics metaspike mft mftecmd mhn microsoft milestones mimikatz missing features mlocate mobile devices mojave mount mtp multiboot usb mus mus 2019 mus2019 nccdc netanalysis netbios netflow new book new years eve new years resolutions nominations nosql notifications ntfs ntfsdisablelastaccessupdate nuc nw3c objectid offensive forensics office office 2016 office 365 oleg skilkin osx outlook outlook web access owa packetsled paladin pancake viewer path specification pdf perl persistence pfic plists posix powerforensics powerpoint powershell prefetch psexec py2exe pyewf pyinstaller python pytsk rallysecurity raw images rdp re-c re-creation testing reader project recipes recon recursive hashing recycle bin redteam regipy registry registry explorer registry recon regripper remote research reverse engineering rhel rootless runas sample images san diego SANS sans dfir summit sarah edwards saturday Saturday reading sbe sccm scrap files search server 2008 server 2008 r2 server 2012 server 2019 setmace setupapi sha1 shadowkit shadows shell items shellbags shimcache silv3rhorn skull canyon skype slow down smb solution solution saturday sop speed sponsors sqlite srum ssd stage 1 stories storport sunday funday swgde syscache system t2 takeout telemetry temporary files test kitchen thanksgiving threat intel timeline times timestamps timestomp timezone tool tool testing training transaction logs triage triforce truecrypt tsk tun naung tutorial typed paths typedpaths uac unc understanding unicorn unified logs unread updates usb usb detective usbstor user assist userassist usnjrnl validation vhd video video blog videopost vlive vmug vmware volatility vote vss web2.0 webcast webinar webmail weekend reading what are you missing what did they take what don't we know What I wish I knew whitfield windows windows 10 windows 2008 windows 7 windows forensics windows server winfe winfe lite winscp wmi write head xboot xfs xways yarp yogesh zimmerman zone.identifier

Hello Reader,
           This weeks winner only recently discovered the blog and the contests therein. Why bring this up? It shows that you don't have to be around for years to have a chance at winning a Sunday Funday. In Michael's case he posted a comment with an answer and sent me an email, and when he is getting in reply today is a winning answer. Congratulations Michael Bryan!

For Dropbox Audit logs what all data can you determine about someone who was logged in?
What allows you to unique identify a file?
The Winning Answer:

Master Deputy Michael Bryan

Dropbox Audit Logs or Activity Logs are a feature of the Dropbox business accounts. The Advanced Team accounts include file level Audit logs as a part of the paid service. These logs are accessible from the Account Console which available the account administrator or administrators. The console provides very detailed information about team member’s usage of the account and nearly all facets of the members’ interactions are recorded and can be reviewed. The following items can be viewed in the Console of an advanced account regarding FILES:
Added a file
Added a file to their Dropbox
Added a file to their Dropbox (non-team member)
Added a folder
Allowed anyone to view links to files in a shared folder
Allowed file request emails for the team
Allowed non collaborators to view links to files in a shared folder
Allowed only team members to view links to files in a shared folder
Changed a file request
Closed a file request
Copied a file
Copied a file to their Dropbox
Copied a file to their Dropbox (non-team member)
Copied a folder
Created a link to a file using an app
Created a new file request
Deleted a file
Deleted a file comment
Deleted a folder
Disabled file requests
Downloaded a file (non-team member)
Downloaded files
Edited files
Enabled file request emails for everyone
Enabled file requests
Failed to delete some files remotely
File added to a showcase
File downloaded (non-team member) from a showcase
File downloaded (team member) from a showcase
File in showcase viewed by non-team member
File in showcase viewed by team member
File removed from a showcase
Liked a file comment
Made a file viewable only to members of the file
Made a file viewable only to team members with the link
Made a file viewable to anyone with the link
Moved a file
Moved a folder
Multiple files downloaded (non-team member) from a showcase
Multiple files downloaded (team member) from a showcase
Opened a file (non-team member)
Prevented non-team members from viewing links to files in a shared folder
Previewed files
Received files via file request
Received files via file request
Renamed a file
Renamed a folder
Requested access to a file (non-team member)
Resolved a file comment
Restored a file
Restored a folder
Restored a resolved file comment
Reverted files to a previous version
Rolled back file changes
Subscribed to file comment notifications
Successfully deleted some files remotely
Unliked a file comment
Unsubscribed from file comment notifications

Additionally, the audit logs maintain information about the users themselves. An administrator can see the following regarding member uses:
The date and time of the event
The member who initiated the event
The details of the event
The location in the form of an IP address of the team member
The logs detail who are the active team members of the last 28 days, the number of shared folders over the last 28 days, how much storage space is used, the number of links created, and a log of what devices are accessing the account over the previous 28 days. From the console you can also monitor password changes, sign ins, connected apps, changes in sharing, changes in groups, and changes in membership. 

The files specific path and file name along with the connected user interactions would allow an administrator to identify a file in the log data.

The information for this initial and feeble attempt at an answer was gathered from poking around the internet and reading Dropbox.com helps files, Dropboxforum posts and two blogs written by “Kevin” on metadatum.wordpress.com (who actual cites the author of this challenge in his 2013 post about Dropbox forensics.) 

Hello Reader,
           Sounds like Google Compute DFIR knowledge must be sparse based on the responses I've gotten .. namely none! So let's change platforms to see how well you know PaaS, Platform as a Service specifically Dropbox.

The Prize:
$100 Amazon Giftcard

The Rules:

  1. You must post your answer before Friday 4/12/19 7PM CST (GMT -5)
  2. The most complete answer wins
  3. You are allowed to edit your answer after posting
  4. If two answers are too similar for one to win, the one with the earlier posting time wins
  5. Be specific and be thoughtful
  6. Anonymous entries are allowed, please email them to dcowen@g-cpartners.com. Please state in your email if you would like to be anonymous or not if you win.
  7. In order for an anonymous winner to receive a prize they must give their name to me, but i will not release it in a blog post

The Challenge:
For Dropbox Audit logs what all data can you determine about someone who was logged in?
What allows you to unique identify a file?

Hello Reader,
             We had a great CTF today that will soon be released to the public. I'm happy to announce the top three winners.

#1 Kevin Pagano
#2 Jonathan Rajewski
#3 Santiago Ayala

Prizes were given away and more prizes await those who will now compete in the online public offering that will be released thursday Until then you can see the current scoreboard here:


You can also register for an account in expectation of Thursday, the ctf is currently paused until then.

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