Analysis
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max time kernel
129s -
max time network
98s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
01/06/2024, 14:30
Behavioral task
behavioral1
Sample
kache.exe
Resource
win7-20240419-en
windows7-x64
14 signatures
150 seconds
Behavioral task
behavioral2
Sample
kache.exe
Resource
win10v2004-20240508-en
windows10-2004-x64
16 signatures
150 seconds
General
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Target
kache.exe
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Size
88KB
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MD5
c90a4499699ec433aca47efd8f442b7e
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SHA1
526fa785605031ccc1f6c7e1b15c61bc63a23f1b
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SHA256
d8165252f798066d1d08a2265a07324611cba08f163c5810ea5c84c25ae914a1
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SHA512
a2051d5442672347039c7bdcef35d430dd7d7266b05e1163ea270aeac0aab139840cb5eaf3f21fa180baede19a775c7b76bb867e1a8e87d6b4ffa61b15b69b37
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SSDEEP
1536:Do2hGMBAr92VmK4lkRyYm4jR0irfNe+NaEK/4UIsawfhlcolZ2zxhUYQu:DoYGMBAr92Vm9lkjm4VL7pgfayoO0zE8
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/2328-0-0x0000000000770000-0x000000000078C000-memory.dmp family_chaos behavioral2/files/0x000600000001e3a4-6.dat family_chaos -
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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation kache.exe Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation svchost.exe -
Drops startup file 3 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\READ_ME.txt svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 3760 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 C:\Users\Admin\Contacts\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\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\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 F:\$RECYCLE.BIN\S-1-5-21-1337824034-2731376981-3755436523-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\Windows\AccountPictures\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\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\Accessibility\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\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\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\Admin\Desktop\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\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\Accessories\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\Programs\Administrative Tools\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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\r46aydfnu.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-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 4212 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 3760 svchost.exe -
Suspicious behavior: EnumeratesProcesses 52 IoCs
pid Process 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 2328 kache.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe 3760 svchost.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2328 kache.exe Token: SeDebugPrivilege 3760 svchost.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2328 wrote to memory of 3760 2328 kache.exe 89 PID 2328 wrote to memory of 3760 2328 kache.exe 89 PID 3760 wrote to memory of 4212 3760 svchost.exe 96 PID 3760 wrote to memory of 4212 3760 svchost.exe 96
Processes
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C:\Users\Admin\AppData\Local\Temp\kache.exe"C:\Users\Admin\AppData\Local\Temp\kache.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2328 -
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:3760 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ_ME.txt3⤵
- Opens file in notepad (likely ransom note)
PID:4212
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
88KB
MD5c90a4499699ec433aca47efd8f442b7e
SHA1526fa785605031ccc1f6c7e1b15c61bc63a23f1b
SHA256d8165252f798066d1d08a2265a07324611cba08f163c5810ea5c84c25ae914a1
SHA512a2051d5442672347039c7bdcef35d430dd7d7266b05e1163ea270aeac0aab139840cb5eaf3f21fa180baede19a775c7b76bb867e1a8e87d6b4ffa61b15b69b37
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Filesize
64B
MD501fd2da27c0454230b52bde8af39350f
SHA1a0eee316a646423dc0f960d8599e7090d99570ae
SHA2569e04f140b43ab81fa4467a339b09c06dd336913b861fb4e8dae1cf280acf3152
SHA5125349e1f08898915dad1ed2cb7a141e2efda7bd43ca8070280354c509310b6bea5a92f137c7a3618d087ebdd03c8f28b8a8b190c500174f443560ae6b1d1ff101