Analyst Notes

SoulSec Team - CMC SOC TEAM

Some thing for analyst

Windows

Windows Event IDs and Lateral Movements

Scheduled Tasks Log	XP: %SystemRoot%\SchedLgu.txt - 7: %SystemRoot%\Tasks\SchedLgu.txt
	106		Task Scheduled
	200		Task Executed
	201		Task Completed
	141		Task Removed
Logon Events	528	4624	Successful Logon
	529	4625	Failed Logon
	538	4647 / 4634	Successful Logoff
	540	4624	Successful Network Logon
		4672	Successful Network Logon as Admin
RDP	21		RDP logon success
	24		RDP user disconnected
	24		RDP user reconnected
		1149	RDP user authenticated
Account Logon Events	680	4776	Successful / Failed account authentication
	672	4768	TGT was issued (successful logon)
	675	4771	Pre-authentication failed (failed logon)
Rogue Local Account	680	4776	An account successfully authenticated
	540	4624	Successful Network Logon immediately following
Share		5140	Share mount
Suspicious Services		7034	Service crashed unexpectedly
		7035	Service sent a Start/Stop control
		7036	Service sent a started or stoped
		7040	Start type changed (Boot
Clearing Event Logs	517	1102

Normal

System

Image Path: No Image Path
Parent Process: No Parent Process
Number of Instances : One 
User account: Local System
Start Time: At boot time

smss.exe

Image Path: %SystemRoot%\System32\smss.exe
Parent Process: System
Number of Instances : One master and another child per session exiting after session is created
User account: Local System
Start Time: Within seconds of boot time for the master instance

wininit.exe

Image Path: %SystemRoot%\System32\wininit.exe
Parent Process: Created by an instane of smss.exe that exists (tools usually don't provide the parent process name)
Number of Instances : One
User account: Local System
Start Time: Within seconds of boot time

taskhost.exe

Image Path: %SystemRoot%\System32\taskhost.exe
Parent Process: services.exe
Number of Instances : One or more
User account: Multiple taskhost.exe processes are normal. Logged-on users and/or local services accounts
Start Time: Within seconds of boot time

lsass.exe

Image Path: %SystemRoot%\System32\lsass.exe
Parent Process: wininit.exe
Number of Instances : One
User account: Local System
Start Time: Within seconds of boot time

winlogon.exe

Image Path: %SystemRoot%\System32\winlogon.exe
Parent Process: Created by an instane of smss.exe that exists (tools usually don't provide the parent process name)
Number of Instances : One or more
User account: Local System
Start Time: Within seconds of boot time for the first instance

csrss.exe

Image Path: %SystemRoot%\System32\csrss.exe
Parent Process: Created by an instane of smss.exe that exists (tools usually don't provide the parent process name)
Number of Instances : Two or more
User account: Local System
Start Time: Within seconds of boot time for the first two instances (Session 0 and 1)
Note: cmd.exe history is stored in these processes' memory 

services.exe

Image Path: %SystemRoot%\System32\services.exe
Parent Process: wininit.exe
Number of Instances : One
User account: Local System
Start Time: Within seconds of boot time for the first two instances (Session 0 and 1)

svchost.exe

Image Path: %SystemRoot%\System32\services.exe
Parent Process: services.exe
Number of Instances : Five or more
User account: Depends of the instance : Local System, Network Service or Local Service accounts
Start Time: Within seconds of boot time or later for services launched after boot
Note: On Win7+ all services bin are signed by Microsoft

lsm.exe

Image Path: %SystemRoot%\System32\lsm.exe
Parent Process: wininit.exe
Number of Instances : One
User account: Depends of the instance : Local System
Start Time: Within seconds of boot time
Note: Handled terminal services including RDP and Fast user switching

explorer.exe

Image Path: %SystemRoot%\explorer.exe
Parent Process: userinit.exe that exists (tools usually don't provide the parent process name)
Number of Instances : One per logged-on user
User account: logged-user
Start Time: Starts when the ownser's interactive session logon begins

Reference

https://digital-forensics.sans.org/media/Poster_2016_Find_Evil.pdf

Artifacts

To-Do

File Download	Open/Save MRU	E-mail Attachments	Skype History	Index.dat/ Places.sqlite	Downloads.sqlite
	This key tracks files that have been opened or saved within a Windows shell dialog box	E-mail Attachments	Skype history	Not directly related to “File Download”. Details stored for each local user account. Records number of times visited (frequency)	Firefox has a built-in download manager application which keeps a history of every file downloaded by the user
	XP: NTUSER.DAT\Software\Microsoft\Windows\ CurrentVersion\Explorer\ComDlg32\OpenSaveMRU	XP: %USERPROFILE%\Local Settings\Application Data\ Microsoft\Outlook	XP: C:\Documents and Settings<username>\Application\Skype<skypeusername>	XP: IE: %userprofile%\Local Settings\History\ History.IE5 FF: %userprofile%\Application Data\Mozilla\ Firefox\ Profiles.default\places.sqlite	XP: %userprofile%\Application Data\Mozilla\ Firefox\ Profiles.default\downloads.sqlite
	Win7: NTUSER.DAT\Software\Microsoft\Windows,CurrentVersion\Explorer\ComDlg32\ OpenSavePIDlMRU	Win7: %USERPROFILE%\AppData\Local\Microsoft\ Outlook	Win7: C:\Users<username>\AppData\Roaming\ Skype<skypeusername>	Win7: IE: %userprofile%\AppData\Local\Microsoft\Windows\History\History.IE5 %userprofile%\AppData\Local\Microsoft\Windows\History\Low\History.IE5 FF: %userprofile%\AppData\Roaming\Mozilla\ Firefox\Profiles.default\places.sqlite	Win7: %userprofile%\AppData\Roaming\Mozilla\ Firefox\ Profiles.default\downloads.sqlite
	The “*” key – This subkey tracks the most recent files of any extension input in an OpenSave dialog .??? (Three letter extension) – This subkey stores file info from the OpenSave dialog by specific extension	MS Outlook data files found in these locations include OST and PST files. One should also check the OLK and Content.Outlook folder, which might roam depending,on the specific version of Outlook used.	Each entry will have a date/time value and a Skype username associated with the action.	Many sites in history will list the files that were opened from remote sites and downloaded to the local system. History will record the access to the file on the website,that was accessed via a link.	Downloads sqlite will include: Filename, Size, and Type Download from and Referring Page File Save Location Application Used to Open File Download Start and End Times

Program Execution	UserAssist	LastVisited MRU	RunMRU Start->Run	AppCompact Cache	Win7 Jump Lists	Prefetch	Service Events
	GUI-based programs launched from the desktop are tracked in the launcher on a Windows System.	Tracks the specific executable used by an application to open the files documented in the OpenSaveMRU key. In addition, each value also tracks the directory location for the last file that was accessed by that application.	Whenever someone does a Start -> Run command, it will log the entry for the command they executed.	Windows Application Compatibility database. Tracks the executable file names, file size, last modified time and in XP the last update time		Utilized to know an application was executed on a system.	Analyze logs for suspicious services
	NTUSER.DAT\Software\Microsoft\Windows\ Currentversion\Explorer\UserAssist{GUID}\Count	XP: NTUSER.DAT\Software\Microsoft\Windows\ CurrentVersion\Explorer\ComDlg32\ LastVisitedMRU Win7: NTUSER.DAT\Software\Microsoft\Windows\ CurrentVersion\Explorer\ComDlg32,LastVisitedPidlMRU	NTUSER.DAT\Software\Microsoft\Windows\ CurrentVersion\Explorer\RunMRU	XP: SYSTEM\CurrentControlSet\Control\SessionManager\AppCompatibility\ Win7: SYSTEM\CurrentControlSet\Control\Session Manager\AppCompatCache	Win 7: C:\Users\username\AppData\Roaming\Microsoft\Windows\Recent\ AutomaticDestinations	C:\Windows\Prefetch
		Tracks the application executables used to open files in OpenSaveMRU and the last file path used.	The order in which the commands are executed is listed in the RunMRU list value. The letters represent the order in which the commands were executed.	Tool: MANDIANT’s ShimCacheParser	Creation Time = First time item added to the AppID file. Modification Time = Last time item added to the AppID file.	Each .pf will include last time of execution, number of times run, and device and file handles used by the program Date/Time file by that name and path was first executed - Creation Date of .pf file (-10 seconds), Date/Time file by that name and path was last executed - Embedded last execution time of .pf file - Last modification date of .pf file (-10 seconds)

Reference

http://digital-forensics.sans.org/media/poster_fall_2013_forensics_final.pdf

Windows Time Rules

$STDINFO

File Rename	Local File Move	Volume File Move	File Copy	File Access	File Modify	File Creation	File Deletion
Modified – No Change	Modified – No Change	Modified – No Change	Modified – No Change	Modified – No Change	Modified – Change	Modified – Change	Modified – No Change
Access – No Change	Access – No Change	Access – Change	Access – Change	Access – Change No Change on Vista/Win7	Access – No Change	Access – Change	Access – No Change
Creation – No Change	Creation – No Change	Creation – No Change	Creation – Change	Creation – No Change	Creation – No Change	Creation – Change	Creation – No Change
Metadata – Changed	Metadata – Changed	Metadata – Changed	Metadata – Changed	Metadata – Changed	Metadata – Changed	Metadata – Changed	Metadata – No Change

$FILENAME

File Rename	Local File Move	Volume File Move	File Copy	File Access	File Modify	File Creation	File Deletion
Modified – No Change	Modified – Change	Modified – Change	Modified – Change	Modified – No Change	Access – No Change	Modified – Change	Modified – No Change
Access – No Change	Access – No Change	Access – Change	Access – Change	Access – No Change	Access – No Change	Access – Change	Access – No Change
Creation – No Change	Creation – No Change	Creation – Change	Creation – Change	Creation – No Change	Creation – No Change	Creation – Change	Creation – No Change
Metadata – No Change	Metadata – Changed	Metadata – Changed	Metadata – Changed	Metadata – No Change	Metadata – No Change	Metadata – Changed	Metadata – No Change

Mass Registry analysis with RegRipper

$ find path_to_the_files/ -type f -exec ./wrapper.sh {} \; 

wrapper.sh
./rip.exe -r "$1" -p user_run >> results.txt

Procmon filters

Operation is WriteFile
Operation is RegSetValue
Details containts Desired Access: Generic Write

Domain users' SIDs

vol.py -f memdump.mem --profile=Win7SP1x64 getsids > getsids_output.txt grep 'S-1-5-21-XXXXXXXXX-XXXXXXXXX-XXXXXXXXX-' getsids_output.txt | egrep '[A-Z][0-9]{6}' -o | sort -u

OS X

List process related to port XXXX (bash)

$ process=`lsof -n -i4TCP:XXXX | grep -v COMMAND | cut -d' ' -f1` ; for i in $process; do ps aux | grep $i | cut -d' ' -f 39- ; done

Linux

List process related to port XXXX

$ process=`sudo netstat -anp | egrep ":XXXX\s" | cut -d/ -f 1 | rev | cut -d' ' -f1 | rev` ; for i in $process; do ps aux | grep $i | grep -v grep; done