Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
17/04/2024, 21:40
Behavioral task
behavioral1
Sample
2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe
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Size
109KB
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MD5
584e9daafdacb3fc3784835891098c64
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SHA1
ec212025600cfa4d22954b936098e207b417bf9e
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SHA256
30f8fe697ec618b721de76c95050f607ba2ffa4ebfcd938eb997f43c294cea27
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SHA512
b743f698206c30f4ea00f9df25f6ae12eb02311e56f9368a0bdc58ff099385472ea8a97fabf7388cc78e32599ad8c93e59ab04c8b5121c72446e7c091046bc04
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwMgW:z6a+CdOOtEvwDpjczq
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000001db0e-13.dat CryptoLocker_rule2 behavioral2/memory/2888-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2888-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000001db0e-13.dat CryptoLocker_set1 behavioral2/memory/2888-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2888-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000800000001db0e-13.dat UPX behavioral2/memory/2888-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2888-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation 2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2888 asih.exe -
resource yara_rule behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000800000001db0e-13.dat upx behavioral2/memory/2888-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2888-27-0x0000000000500000-0x0000000000510000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4856 wrote to memory of 2888 4856 2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe 87 PID 4856 wrote to memory of 2888 4856 2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe 87 PID 4856 wrote to memory of 2888 4856 2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4856 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2888
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
109KB
MD5dfc35a100f43d72bebab2a75c4502d9d
SHA1758214e806f87b7238dd231a3b512bb9eadcebe9
SHA25655f46db1697890df5d738e601d35af772c4f20c48cfec60cfe7796ace530e610
SHA512916a11adf49eed120251368dee0cc485cfd54b977c150b42025fe51b71de6660a7d80c7d4349afd9581f374a21ee5d1717e9ef3f8353a62c5f979222ded48fb7