Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
12-02-2024 20:01
Behavioral task
behavioral1
Sample
2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exe
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Size
125KB
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MD5
699b1fedef6447cb58df4c2db0e99da6
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SHA1
9294956cd62ac2a1d6399311b5ed00d2ccbf2bac
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SHA256
0741a07340e647275019a4c54589cae19d00d81e5fcb57b804c576338e0dc48e
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SHA512
da12138231475035c16e2e1836ba11c716ffa176cd80065a4682af5d97f76db13865ecf6e3363fe644cb5e32397a319069b0238e8eec349bfc4cfae142773a58
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eo:AnBdOOtEvwDpj6zu
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/1268-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/3908-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1268-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3908-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral2/memory/1268-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/3908-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/1268-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3908-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/1268-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/3908-19-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/1268-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3908-27-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 3908 asih.exe -
Processes:
resource yara_rule behavioral2/memory/1268-0-0x0000000000500000-0x000000000050F000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/3908-19-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/1268-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3908-27-0x0000000000500000-0x000000000050F000-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
Processes:
2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exedescription pid process target process PID 1268 wrote to memory of 3908 1268 2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exe asih.exe PID 1268 wrote to memory of 3908 1268 2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exe asih.exe PID 1268 wrote to memory of 3908 1268 2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_699b1fedef6447cb58df4c2db0e99da6_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
126KB
MD55ee5a124562656f39cbb04109d309712
SHA12af5000eea5b0d240b7dcbe92769298a3d9de924
SHA25686fdbf5f026744486b87dda7f440f295d127ef6ae95ecbcc1cddd145d9dd1c41
SHA512feac6f740842d7f2bd9ee92b8ed19c9beb14fc11d12d86b098c27d2881e6a61354b27aba96bae8e73eb38001282e0b74b2d18f5a8dd81248a18e78476f191e7d
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memory/1268-0-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/1268-1-0x0000000002190000-0x0000000002196000-memory.dmpFilesize
24KB
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memory/1268-2-0x0000000002190000-0x0000000002196000-memory.dmpFilesize
24KB
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memory/1268-3-0x00000000021B0000-0x00000000021B6000-memory.dmpFilesize
24KB
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memory/1268-17-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/3908-19-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/3908-20-0x0000000002100000-0x0000000002106000-memory.dmpFilesize
24KB
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memory/3908-22-0x00000000005C0000-0x00000000005C6000-memory.dmpFilesize
24KB
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memory/3908-27-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB