Analysis
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max time kernel
118s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
21/03/2025, 06:03
Behavioral task
behavioral1
Sample
2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe
Resource
win10v2004-20250314-en
General
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Target
2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe
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Size
26KB
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MD5
a261b01eacf8494cec58f0a20d573d35
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SHA1
b0fd7110500b3b8e78514dc7c024b5e4c0d2329c
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SHA256
33139f448f54b18034b40fa25ff8b8e068d790f40d038c37cf6a410be948fc3e
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SHA512
a6fa275542ab0eb1e036f9a62f7ac6f613cfce813fe72c30223b69b5c404ab713d357529fe4bb7c1ce9999aa92e3aebd78ff31282387b277f622cca339e8c03e
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SSDEEP
384:AftWZPzzxAm1vmHZVJ2s3HlMDwX9YNlIOy5o91ih082vX:L7zxAmyZTnce9Dho9QO82v
Malware Config
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 3 IoCs
resource yara_rule behavioral1/memory/2364-1-0x0000000000D40000-0x0000000000D4C000-memory.dmp family_chaos behavioral1/files/0x000d000000015ceb-5.dat family_chaos behavioral1/memory/2388-8-0x0000000000A30000-0x0000000000A3C000-memory.dmp family_chaos -
Chaos family
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Renames multiple (182) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Drops startup file 2 IoCs
description ioc Process 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\ezzzzzzzzzzzzzzzzzz.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 2388 svchost.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\UpdateTask = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe" svchost.exe -
Drops desktop.ini file(s) 64 IoCs
description ioc Process File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\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\Searches\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-312935884-697965778-3955649944-1000\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\Local\Microsoft\Windows Mail\Stationery\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\Documents\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\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\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\4DY23DRT\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\Accessories\Windows PowerShell\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\Public\Music\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\AppData\Roaming\Microsoft\Windows\Libraries\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\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\CUMHXU73\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\98Y29LGS\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\Admin\Downloads\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\Public\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\Sample Media\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\R627XHFP\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\YPLB435F\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\Local\Microsoft\Windows\History\History.IE5\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\Music\Sample Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\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\Links\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\OM66BHWE\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\U8F4PBMO\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\Public\Desktop\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\Admin\Videos\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\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\T072YXIW\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\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1084 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 2364 2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe 2388 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2364 2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe 2364 2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe 2364 2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe 2388 svchost.exe 2388 svchost.exe 2388 svchost.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2364 2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe Token: SeDebugPrivilege 2388 svchost.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 2364 wrote to memory of 2388 2364 2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe 31 PID 2364 wrote to memory of 2388 2364 2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe 31 PID 2364 wrote to memory of 2388 2364 2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe 31 PID 2388 wrote to memory of 1084 2388 svchost.exe 33 PID 2388 wrote to memory of 1084 2388 svchost.exe 33 PID 2388 wrote to memory of 1084 2388 svchost.exe 33
Processes
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C:\Users\Admin\AppData\Local\Temp\2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2025-03-21_a261b01eacf8494cec58f0a20d573d35_chaos_destroyer_wannacry.exe"1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2364 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Drops desktop.ini file(s)
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2388 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\ezzzzzzzzzzzzzzzzzz.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1084
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
37B
MD55028d7db4667363bcb21ff4d7982df6d
SHA158a7b76dd001a5cb9b9a01ad81c0bea0f9324048
SHA25679b003488f2e7d5ce72f00027aae9e6d1f2f598ccd37b3599a59aa5b3cf1a64f
SHA512d7e11531b2d515689f5332de45b144882ec14ac9c861a6813ff1c8d4f36d58bc02da69f019f2f97159e5f771911ce0114ee5310adafd03eacbe1f469dd653984
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Filesize
26KB
MD5a261b01eacf8494cec58f0a20d573d35
SHA1b0fd7110500b3b8e78514dc7c024b5e4c0d2329c
SHA25633139f448f54b18034b40fa25ff8b8e068d790f40d038c37cf6a410be948fc3e
SHA512a6fa275542ab0eb1e036f9a62f7ac6f613cfce813fe72c30223b69b5c404ab713d357529fe4bb7c1ce9999aa92e3aebd78ff31282387b277f622cca339e8c03e
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
13KB
MD5e5d26fefdbf6f7d1a05231232c335074
SHA141f1276d4776697d2ff106ca1a61938ba9c2d05d
SHA256cec8e691d1b79250e73bef1dd1b3d541143c3a36c522e963c470b249d8b3ecb7
SHA512e0492996ddc9e8f439a906e006dd3854586a25f79232826efc282a76a4ac940eb326e0686f3bd63c00addc6531eda3bfa395eb74234de01e71fc2e639c09c723