Analysis
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max time kernel
148s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
16/05/2024, 23:45
Behavioral task
behavioral1
Sample
2024-05-16_1ebca21f1ed735a2cd61d59bd7e19d03_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-16_1ebca21f1ed735a2cd61d59bd7e19d03_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-16_1ebca21f1ed735a2cd61d59bd7e19d03_cryptolocker.exe
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Size
39KB
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MD5
1ebca21f1ed735a2cd61d59bd7e19d03
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SHA1
e5aec87a86d7a5d9e1dee012272e06b3e93b0579
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SHA256
a54b4176bf8ac4991f9b55467298b3d25142dd945a32a4d68080c1280eb31572
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SHA512
01f7523c728f7fd62e7c2b200c400a7fbb10bcb2daaac1211f13d4ddd46a049cfd14d78169a2c2bb4a315aceca53e3e05474c90f894db4e195a6d208a57f24fd
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYjwL:qDdFJy3QMOtEvwDpjjWMl7TkM
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1624-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002328e-13.dat CryptoLocker_rule2 behavioral2/memory/1780-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1624-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1780-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1624-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000002328e-13.dat CryptoLocker_set1 behavioral2/memory/1780-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1624-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1780-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1624-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000700000002328e-13.dat UPX behavioral2/memory/1780-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1624-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1780-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-05-16_1ebca21f1ed735a2cd61d59bd7e19d03_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1780 asih.exe -
resource yara_rule behavioral2/memory/1624-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000700000002328e-13.dat upx behavioral2/memory/1780-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1624-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1780-27-0x0000000000500000-0x0000000000510000-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 1624 wrote to memory of 1780 1624 2024-05-16_1ebca21f1ed735a2cd61d59bd7e19d03_cryptolocker.exe 83 PID 1624 wrote to memory of 1780 1624 2024-05-16_1ebca21f1ed735a2cd61d59bd7e19d03_cryptolocker.exe 83 PID 1624 wrote to memory of 1780 1624 2024-05-16_1ebca21f1ed735a2cd61d59bd7e19d03_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-16_1ebca21f1ed735a2cd61d59bd7e19d03_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-16_1ebca21f1ed735a2cd61d59bd7e19d03_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1624 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1780
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD56437fbbd43404bb2e68620d152dfcea5
SHA178313ae6344847073fb3c734169b8ad62477ec6f
SHA256d8088a1593ba26535b8a47b30a85e45ea3a48dffbc3ad17540f7579c06d62331
SHA512ed33caceb9b56cc97789d5449aac040c32a7981dc9b5889603e42a032d81c813686c79cb077ebfa71d4ffc9398b5066a02f70c510742c4aefe03760810bfd489