Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
25-01-2024 17:51
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exe
Resource
win7-20231129-en
General
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Target
2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exe
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Size
71KB
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MD5
5ef553290eefdf29a58decf9ce6e36b3
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SHA1
5e62c82bdee69dc57db8cf2f5e3521c71061d5f3
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SHA256
2ce181456f1c9ab60f789e29b5290e53bee1bfe021636c109595dae0211538c5
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SHA512
3f062302e3f671bdb28f20c75ee56bd6d908ac32533ff848b5f43b8f87277bd2275ae42198010d7e760762ef8fc0c3dff451f0edce9efe351530a29e4fd321c9
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SSDEEP
1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1bb:X6a+SOtEvwDpjBZYvQd2H
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 2768 asih.exe -
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
Processes:
2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exedescription pid process target process PID 932 wrote to memory of 2768 932 2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exe asih.exe PID 932 wrote to memory of 2768 932 2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exe asih.exe PID 932 wrote to memory of 2768 932 2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_5ef553290eefdf29a58decf9ce6e36b3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:932 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2768
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5a9d8979af738ee59daceef5a600bfdc6
SHA131c9e0f59027e4de4057e7236d6a23beeb222420
SHA256cc869b23c2ac292a3e1cb053d70e46777e0db3791a2dc56dbc9fabb7f351edbe
SHA5126d10769853495eb18bccbed3f69e6a44a1b93de242953a3846ddeaa05191e1adcbc15c146822e51007cd78a8b9c423c55a24f99de21a884dfad37cce6cf85aca