Analysis
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max time kernel
90s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
28/01/2024, 22:40
Behavioral task
behavioral1
Sample
307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe
Resource
win10v2004-20231222-en
General
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Target
307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe
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Size
26KB
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MD5
8e81387093fe5365fa39ced642d313b1
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SHA1
be1deddf30929cf5189defa654cd4a31970613d8
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SHA256
b81bdbec34fd9acb9e3e8f73b621170b2f9ed1043f1dc50d4201544c78f17f0d
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SHA512
159264ab90698d851c7a67854ef202b48b9a699e59606db9474e64a4d7ee408b620ce16d93b63c480bb246e61432c0487a4c24150f40fe89fe7b2b2251343b29
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SSDEEP
384:qYenjLLAps4T5lBavzb/xlhKOVp91Qfdb5hxDGM:5OElB6sc9GfdbXxDH
Malware Config
Extracted
C:\Users\Admin\AppData\Local\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/1432-0-0x0000000000E50000-0x0000000000E5C000-memory.dmp family_chaos behavioral2/files/0x0008000000016928-6.dat family_chaos -
Detects command variations typically used by ransomware 2 IoCs
resource yara_rule behavioral2/memory/1432-0-0x0000000000E50000-0x0000000000E5C000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral2/files/0x0008000000016928-6.dat INDICATOR_SUSPICIOUS_GENRansomware -
Renames multiple (179) 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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation svchost.exe Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.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 1456 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\AppData\Local\Microsoft\Windows\WinX\Group1\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\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\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\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group3\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Public\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3803511929-1339359695-2191195476-1000\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\All Users\Microsoft\Windows\Start Menu\Programs\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\Default\AppData\Local\Microsoft\Windows\WinX\Group3\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Public\AccountPictures\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\Admin\Contacts\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\3D Objects\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessibility\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 C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\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\Local\Microsoft\Windows\Burn\Burn\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\Windows\Start Menu\Programs\System Tools\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\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\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\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\Admin\AppData\Local\Microsoft\Windows\Burn\Burn1\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\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\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\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\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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-1-5-21-3803511929-1339359695-2191195476-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1764 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1456 svchost.exe -
Suspicious behavior: EnumeratesProcesses 52 IoCs
pid Process 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe 1456 svchost.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe Token: SeDebugPrivilege 1456 svchost.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1432 wrote to memory of 1456 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 88 PID 1432 wrote to memory of 1456 1432 307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe 88 PID 1456 wrote to memory of 1764 1456 svchost.exe 94 PID 1456 wrote to memory of 1764 1456 svchost.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe"C:\Users\Admin\AppData\Local\Temp\307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1432 -
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:1456 -
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:1764
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\307a29a325ff889e168f829123bf68009d83abae211c364ba7d9469fb0ce7b37.exe.log
Filesize226B
MD528d7fcc2b910da5e67ebb99451a5f598
SHA1a5bf77a53eda1208f4f37d09d82da0b9915a6747
SHA2562391511d0a66ed9f84ae54254f51c09e43be01ad685db80da3201ec880abd49c
SHA5122d8eb65cbf04ca506f4ef3b9ae13ccf05ebefab702269ba70ffd1ce9e6c615db0a3ee3ac0e81a06f546fc3250b7b76155dd51241c41b507a441b658c8e761df6
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Filesize
964B
MD54217b8b83ce3c3f70029a056546f8fd0
SHA1487cdb5733d073a0427418888e8f7070fe782a03
SHA2567d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA5122a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
26KB
MD58e81387093fe5365fa39ced642d313b1
SHA1be1deddf30929cf5189defa654cd4a31970613d8
SHA256b81bdbec34fd9acb9e3e8f73b621170b2f9ed1043f1dc50d4201544c78f17f0d
SHA512159264ab90698d851c7a67854ef202b48b9a699e59606db9474e64a4d7ee408b620ce16d93b63c480bb246e61432c0487a4c24150f40fe89fe7b2b2251343b29