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, 01:10
Behavioral task
behavioral1
Sample
2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe
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Size
40KB
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MD5
41e12fef682552006eb6b091f84cf435
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SHA1
06c210cabae5d49e3129f65a8acf4ee2dce051ff
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SHA256
f50afaf32b4de0859d9ed5d7fa9c10203032e8ae5f2cbab16606713766b13c83
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SHA512
feda7b2baa1bb5ebdefcbb6099a0d6cb8a165510e1f7c54f27a2ca92b5a3d4a2936fb63f42b3e69ec9d3fbeda3ace655872bb327ec8f4cbcaf2901c542ec5566
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYXtt:qDdFJy3QMOtEvwDpjjWMl7TYt
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1004-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_rule2 behavioral2/memory/3196-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1004-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3196-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1004-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_set1 behavioral2/memory/3196-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1004-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3196-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1004-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000022f51-13.dat UPX behavioral2/memory/3196-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1004-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3196-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3196 asih.exe -
resource yara_rule behavioral2/memory/1004-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0008000000022f51-13.dat upx behavioral2/memory/3196-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1004-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3196-27-0x0000000000500000-0x0000000000510000-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 1004 wrote to memory of 3196 1004 2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe 82 PID 1004 wrote to memory of 3196 1004 2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe 82 PID 1004 wrote to memory of 3196 1004 2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1004 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3196
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD56f6916a106036b9a313bd317b1af97c9
SHA117e935e47756a954bd892f384e9521123ecb8a04
SHA25694cab0155fe1edff174c206015a26ced2e9d57b18366da88c667673294623a10
SHA512276e2ee84ae44db7387c5a579edddcddece701fc70f93d99bbb3a5a9990073cf32c517d3465ca02d7304a4a3503a62441341354016beee3493c65dbe4f509c68