Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 01:26
Behavioral task
behavioral1
Sample
2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe
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Size
40KB
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MD5
f70378e0cc1359fe1feaadc6df5c0a8f
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SHA1
93c05ba709ced15b19e5f323e1033a4303dd916c
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SHA256
c07b9815d241658c5388fb44aafac7d2a69bb46c57e8bd09faec098e1f96af3c
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SHA512
dae6edd6abe73ce77e25379ce8b7fa85d2fa60e79459ce532a4da22223501ae83d4d12b953ad27fe766ad7b86d2ff7f82e4be27c935767f7a51501f4f502a1ee
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9FF:qDdFJy3QMOtEvwDpjjWMl7T4
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/840-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000600000002329e-13.dat CryptoLocker_rule2 behavioral2/memory/840-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4848-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4848-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/840-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000600000002329e-13.dat CryptoLocker_set1 behavioral2/memory/840-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4848-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4848-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/840-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000600000002329e-13.dat UPX behavioral2/memory/840-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4848-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4848-28-0x0000000000500000-0x0000000000510000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation 2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4848 asih.exe -
resource yara_rule behavioral2/memory/840-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000600000002329e-13.dat upx behavioral2/memory/840-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4848-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4848-28-0x0000000000500000-0x0000000000510000-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 840 wrote to memory of 4848 840 2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe 82 PID 840 wrote to memory of 4848 840 2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe 82 PID 840 wrote to memory of 4848 840 2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:840 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4848
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD58a07d44a5dc8be7ceb822de387f2a699
SHA1227f1a4fd3e6b8735025480dedf4eec88f1a3060
SHA256c8c21c5242417462e1d8d67525da937ac522d74eabf9a97a0283b3919938037e
SHA5123bfec6a39476ca87e98aca86231fead727dd96c3fe1a82b961f153b941e317a621700f6aed877af5fce8ab00cb80968c00384144e8f2166b985bdd0ef752d8d8