Memory Forensic: Investigating Memory Artefact (Workshop)

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Workshop of memory forensic Atmajaya University Yogyakarta, 2017-04-29 What is memory forensic? How could it be important? How can we use memory forensic in certain case? Should we do memory forensic? This is the workshop side with hands-on material.

Memory Forensic
Investigating Memory Artefact
http://xathrya.id/ 1
Satria Ady Pradana@ Universitas Atma Jaya Yogyakarta
29 April 2017
Workshop

# Whoami?
• Cyber Security Consultant at Mitra Integrasi
Informatika (MII)
• Researcher at dracOs Dev Team
• Coordinator of Reversing.ID
http://xathrya.id/ 2

Organization
• Divided to some sections related to forensic
stages.
• Each section has objectives
• Has background explanation if necessary
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Overview
• Engage in practical forensic activity
• Acquisition
– Windows Memory Acquisition
• Analysis
– Process & DLLs
– Registry
– Connections
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Assumption
• Have understanding of simple UNIX command
(explained in previous workshop)
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Windows
Brief Introduction to Our Target’s Internal
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Volatility
Tools of the Trade
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Preliminary
$ export VOLATILITY_PROFILE=Win7SP0x86
$ export
VOLATILITY_LOCATION=file:///tmp/image.img
$ vol.py pslist
$ vol.py files
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0x1 Acquisition
Objectives:
• Understanding the memory (RAM) and
volatile data.
• Understanding the acquisition technique for
memory forensic.
• Know how to dump memory on Windows
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• Acquisition can be hardware based or
software based.
• Hardware based, require special hardware and
has capability of DMA.
– Firewire (IEEE 1394)
• But we are talking about software based.
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Tools
• DumpIt & Hibr2Bin
• Winpmem
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Image Format
• Raw
• Crash Dumps
• Hibernate
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Using DumpIt & Hibr2Bin
Producing crash dump
> DumpIt.exe
Converting Hibernate File
> Hibr2Bin.exe
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Using Winpmem
Producing dump in AFF4 compression
> winpmem.exe -o imagedump.aff4
Export to raw from AFF4
> winpmem.exe imagedump.aff4 –export
PhysicalMemory -o memory.img
Producing raw dump
> winpmem.exe imagedump.aff4 –export
PhysicalMemory -o memory.img
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Vmware Memory Dump
• Applied to OS running on top of Vmware
• To generate memory dump, we should
suspend the running VM
– It will generate a .vmem file
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VirtualBox Memory Dump
• Applied to OS running on top of VirtualBox
• Start VM and use Vboxmanage
$ vboxmanage debugvm “GuestVM” dumpguestcore
--filename dump.elf
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CHECKING IMAGE
Information
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• Gain information about memory dump
$ vol.py imageinfo
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PROCESS & DLL
View & Dump
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View
• List all process
$ vol.py pslist
$ vol.py psscan
$ vol.py pstree
$ vol.py psxview
$ vol.py privs
Different?
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View
• List all threads
$ vol.py threads
$ vol.py thrdscan
Different?
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View
• List modules/libraries of process (ex: pid 135)
$ vol.py dlllist –p 135
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Dump
• Dump process
$ vol.py procdump -p 135 --dump-dir
/tmp/procdump
• Dump DLL
$ vol.py dlldump -p 135 –dump-dir
/tmp/dlldump
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CONNECTIONS
IP, Port, Sockets
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• List connections made
$ vol.py connscan
$ vol.py netscan
• List opened sockets
$ vol.py sockets
$ vol.py sockscan
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View
$ vol.py hivelist
$ vol.py hivescan
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• Scan opened files in memory
$ vol.py files
• Dump files
$ vol.py dumpfiles
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CHALLENGE: ANALYZE
COMPROMISED HOST
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