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Analysis
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max time kernel
148s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
19/04/2024, 04:40
Behavioral task
behavioral1
Sample
2024-04-19_f53151c1b9fd89145db85920347c101f_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-04-19_f53151c1b9fd89145db85920347c101f_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-19_f53151c1b9fd89145db85920347c101f_cryptolocker.exe
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Size
128KB
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MD5
f53151c1b9fd89145db85920347c101f
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SHA1
ba9881feff61a452f4f1c795a90fc72c25dac443
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SHA256
f0ff9f441c13270b71e44d333c011b7dde514cbf47ca76857ee5ea297481cb06
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SHA512
4561995bf1e03f0c2b6f7c5aae138c0d780bfacb99ba7cf0cd8935f6e12d8ca81dd4c36d523a2c8de4ad708977a49c7f0e3dcb84d5e7043f7c4b8bb56ca802fd
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1ebHkW0:AnBdOOtEvwDpj6zM
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000300000001e970-13.dat CryptoLocker_rule2 behavioral2/memory/536-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3176-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3176-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000300000001e970-13.dat CryptoLocker_set1 behavioral2/memory/536-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3176-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3176-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x000300000001e970-13.dat UPX behavioral2/memory/536-16-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3176-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3176-27-0x0000000000500000-0x000000000050F000-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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation 2024-04-19_f53151c1b9fd89145db85920347c101f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3176 asih.exe -
resource yara_rule behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x000300000001e970-13.dat upx behavioral2/memory/536-16-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3176-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3176-27-0x0000000000500000-0x000000000050F000-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
description pid Process procid_target PID 536 wrote to memory of 3176 536 2024-04-19_f53151c1b9fd89145db85920347c101f_cryptolocker.exe 85 PID 536 wrote to memory of 3176 536 2024-04-19_f53151c1b9fd89145db85920347c101f_cryptolocker.exe 85 PID 536 wrote to memory of 3176 536 2024-04-19_f53151c1b9fd89145db85920347c101f_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-19_f53151c1b9fd89145db85920347c101f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-19_f53151c1b9fd89145db85920347c101f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:536 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3176
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
129KB
MD587c65ad3235a81e4e815fee0d795a58e
SHA17dcce8d2f115078c575927fd762516f939a218c7
SHA2563f642081b1f4583e119b704c65b306f825a947c20532ba6df28b558eaeabe130
SHA512ec3fbe4c82a4246846a91e2a5537b80a4285c9fc1c310a474d34bcbc8014df2f4e5815866634072561cd1999e5395cb7128885b36d80da226374e9d02f2549f7