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Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
28/03/2024, 03:24
Behavioral task
behavioral1
Sample
2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe
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Size
57KB
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MD5
0246340b9ca915387c85df4645c336ea
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SHA1
f6caeb7b4409bbac8811f3de63f3d9a066a8cfe0
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SHA256
72a34ac5aabd8009dbee2acd2fdb6be62bfb29fa16e65384e22887c46192ea85
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SHA512
bb4117d6d8c021fb13435b66f458fa601762b3a72c3781e773c6bc27d3e7c813bf6c2fab15ed0726b98f904de094aa0730a5be9dae9b9d4ad8f33fc2a5866d3f
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj9aYa9mpLI:z6a+CdOOtEvwDpjQP
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002320b-13.dat CryptoLocker_rule2 behavioral2/memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4232-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000002320b-13.dat CryptoLocker_set1 behavioral2/memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4232-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000800000002320b-13.dat UPX behavioral2/memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4232-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation 2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4232 asih.exe -
resource yara_rule behavioral2/memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000800000002320b-13.dat upx behavioral2/memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4232-26-0x0000000000500000-0x0000000000510000-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 704 wrote to memory of 4232 704 2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe 87 PID 704 wrote to memory of 4232 704 2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe 87 PID 704 wrote to memory of 4232 704 2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:704 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4232
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
57KB
MD58c6cf5f4ac018b689f0108b5fbb21c74
SHA13a0eb306d4f4276742be8198ec27f0b3d2a23052
SHA256624233c3f30ca1483fdf053baaa524e72cb6954b5d3d1ad986e7a7a140aa4f5e
SHA51246da013d838d902a1c6770e7d7267a025051142589adba14ab3712c24a9b71caaaa0fa73cc88dc08e6f82d91394e85bd8fe07df195a9b00ff9fc43204b712842