Analysis
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max time kernel
130s -
max time network
105s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
14-05-2024 08:12
Behavioral task
behavioral1
Sample
923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe
Resource
win7-20240221-en
windows7-x64
14 signatures
150 seconds
Behavioral task
behavioral2
Sample
923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe
Resource
win10v2004-20240426-en
windows10-2004-x64
16 signatures
150 seconds
General
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Target
923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe
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Size
713KB
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MD5
4bff5ddaa43a2342fdd1bbae21522141
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SHA1
f3b5c279fa1b9c7abb03e2a11c2c3965ef9eb8d3
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SHA256
923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2
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SHA512
f184cdeafabdb214564a7f90b2f3b60e1e2c8f70769e6679e2bd75243d02e83b69b27021a7fce2e58719537b3cff4b010a2007b4441d25d6fde6553d4801237e
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SSDEEP
12288:hA7D8KKjkzC1Xa7e5HSyOXxlktEWFJF1XLpXLFLSiC56JHOtDmcIJAVcZ3BAT2kb:P4mWopxZJAT
Score
10/10
Malware Config
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/3052-1-0x0000000000500000-0x00000000005B8000-memory.dmp family_chaos behavioral2/files/0x00030000000229de-6.dat family_chaos -
Renames multiple (180) 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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation svchost.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_ME_USER.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4720 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) 34 IoCs
description ioc Process File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3571316656-3665257725-2415531812-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\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\Favorites\Links\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\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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\Start Menu\Programs\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\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\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\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\Public\Desktop\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\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\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\Windows\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\83gzfn31v.jpg" 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-1-5-21-3571316656-3665257725-2415531812-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 548 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4720 svchost.exe -
Suspicious behavior: EnumeratesProcesses 49 IoCs
pid Process 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe 4720 svchost.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe Token: SeDebugPrivilege 4720 svchost.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3052 wrote to memory of 4720 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 88 PID 3052 wrote to memory of 4720 3052 923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe 88 PID 4720 wrote to memory of 548 4720 svchost.exe 95 PID 4720 wrote to memory of 548 4720 svchost.exe 95
Processes
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C:\Users\Admin\AppData\Local\Temp\923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe"C:\Users\Admin\AppData\Local\Temp\923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3052 -
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)
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4720 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ_ME_USER.txt3⤵
- Opens file in notepad (likely ransom note)
PID:548
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
713KB
MD54bff5ddaa43a2342fdd1bbae21522141
SHA1f3b5c279fa1b9c7abb03e2a11c2c3965ef9eb8d3
SHA256923dddc478a17d0adf0c86d1b5eb709ea4b48114cbb2c0e72052bd69caae95b2
SHA512f184cdeafabdb214564a7f90b2f3b60e1e2c8f70769e6679e2bd75243d02e83b69b27021a7fce2e58719537b3cff4b010a2007b4441d25d6fde6553d4801237e
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Filesize
1017B
MD52df0c97cb7d6a2792d3111a276192d36
SHA1141580fbfb6385e00eff2dd3880e321844acbebd
SHA25652ad64843efc73a4a6c646f94e1eb29b4d212a7a4e4e999f7efe2bfe0455293b
SHA512209edb419c059188e8bf407ce1670c153b7b7ad7288e5b11f8a6271b55087ea76463dc0394c4b57d82f0b517e08980073da57dd71066a04cc9a9d708e7bd8aba