Analysis
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max time kernel
142s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
28/01/2024, 22:41
Behavioral task
behavioral1
Sample
31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe
Resource
win10v2004-20231215-en
General
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Target
31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe
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Size
26KB
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MD5
5ad4c0c27484c9c6fd43ad824fe25e8c
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SHA1
aeafb8a48c44f8399aa517c17f9f271d1828fe00
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SHA256
f04473085b515592a8148b64922d6170991574049897d37794ae4469a78b68bf
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SHA512
0f4f9ca88ce823e977906df3719381f1b05f698649b1440f8d7b991175ae6117b94a1ac7943d9b61afc8025c6c66d582b1143d58b64d3fb7f8adc005d9c3bb86
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SSDEEP
384:qYenjLLAps4T5lBavzb/xlhKOVp91Qfb5hxDGL:5OElB6sc9GfbXxDg
Malware Config
Extracted
C:\Users\Admin\3D Objects\read_it.txt
chaos
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 2 IoCs
resource yara_rule behavioral2/memory/4008-0-0x00000000006E0000-0x00000000006EC000-memory.dmp family_chaos behavioral2/files/0x000600000002324c-6.dat family_chaos -
Detects command variations typically used by ransomware 2 IoCs
resource yara_rule behavioral2/memory/4008-0-0x00000000006E0000-0x00000000006EC000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral2/files/0x000600000002324c-6.dat INDICATOR_SUSPICIOUS_GENRansomware -
Renames multiple (183) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation svchost.exe Key value queried \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe -
Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4816 svchost.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 64 IoCs
description ioc Process File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini svchost.exe File opened for modification C:\Users\Public\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group1\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2398549320-3657759451-817663969-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\System Tools\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Application Shortcuts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group2\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn1\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\StartUp\desktop.ini svchost.exe File opened for modification C:\Users\Public\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group2\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn2\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group3\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group1\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\3D Objects\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group3\desktop.ini svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1648 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4816 svchost.exe -
Suspicious behavior: EnumeratesProcesses 51 IoCs
pid Process 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe 4816 svchost.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe Token: SeDebugPrivilege 4816 svchost.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 4008 wrote to memory of 4816 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 82 PID 4008 wrote to memory of 4816 4008 31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe 82 PID 4816 wrote to memory of 1648 4816 svchost.exe 91 PID 4816 wrote to memory of 1648 4816 svchost.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe"C:\Users\Admin\AppData\Local\Temp\31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4008 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4816 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1648
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
964B
MD54217b8b83ce3c3f70029a056546f8fd0
SHA1487cdb5733d073a0427418888e8f7070fe782a03
SHA2567d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA5122a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\31ba028e8babf7e321b2faaa6fec0540f6871c38aef1fefd49c2ca3d6514704e.exe.log
Filesize226B
MD528d7fcc2b910da5e67ebb99451a5f598
SHA1a5bf77a53eda1208f4f37d09d82da0b9915a6747
SHA2562391511d0a66ed9f84ae54254f51c09e43be01ad685db80da3201ec880abd49c
SHA5122d8eb65cbf04ca506f4ef3b9ae13ccf05ebefab702269ba70ffd1ce9e6c615db0a3ee3ac0e81a06f546fc3250b7b76155dd51241c41b507a441b658c8e761df6
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
26KB
MD55ad4c0c27484c9c6fd43ad824fe25e8c
SHA1aeafb8a48c44f8399aa517c17f9f271d1828fe00
SHA256f04473085b515592a8148b64922d6170991574049897d37794ae4469a78b68bf
SHA5120f4f9ca88ce823e977906df3719381f1b05f698649b1440f8d7b991175ae6117b94a1ac7943d9b61afc8025c6c66d582b1143d58b64d3fb7f8adc005d9c3bb86