Analysis
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max time kernel
149s -
max time network
156s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
23-05-2024 02:28
Behavioral task
behavioral1
Sample
2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe
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Size
39KB
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MD5
3fbb44fe3b30b54bee323310173bebd8
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SHA1
ef99ac32c856483241ce433cbf71ce6ea7683566
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SHA256
960890c0a08994db206ae216a467454626540fc1f8f1c9aef3c7867d9b6433af
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SHA512
808479ab1625e0245ee43b4db1ca83f4fb832c086046aa5a9bf1314ab43eb543f7e0982e1c03134cddb36d87843ec08be43961b7d422f0339403fa469a219a89
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8l2S:qDdFJy3QMOtEvwDpjjWMl7Tdn83
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral1/memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral1/memory/2648-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2828-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2828-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral1/memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral1/memory/2648-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2828-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2828-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral1/memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX \Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral1/memory/2648-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2828-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2828-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 2828 asih.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exepid process 2648 2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe -
Processes:
resource yara_rule behavioral1/memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmp upx \Users\Admin\AppData\Local\Temp\asih.exe upx behavioral1/memory/2648-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2828-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2828-27-0x0000000000500000-0x0000000000510000-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 4 IoCs
Processes:
2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exedescription pid process target process PID 2648 wrote to memory of 2828 2648 2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe asih.exe PID 2648 wrote to memory of 2828 2648 2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe asih.exe PID 2648 wrote to memory of 2828 2648 2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe asih.exe PID 2648 wrote to memory of 2828 2648 2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe"1⤵
- Loads dropped DLL
- 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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\Users\Admin\AppData\Local\Temp\asih.exeFilesize
39KB
MD5764b70f4dc32746a42da81806324faeb
SHA1ed7feb94ec50a11c7a36198a6f73f22a26f92a33
SHA2560e2c31dffb511670bc1ba0e9c98bc68b6ae1a0d2a46d011685b5bfd3c069aa05
SHA51255fec337c8d15fc79fa69121c412403a58f272fcba6223689677073c87489c0a80aa0df049ce28b9b4dc35ebe392957f0fd788b60a7134c313ae87b64321ff6a
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memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2648-1-0x00000000003C0000-0x00000000003C6000-memory.dmpFilesize
24KB
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memory/2648-2-0x00000000004E0000-0x00000000004E6000-memory.dmpFilesize
24KB
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memory/2648-9-0x00000000003C0000-0x00000000003C6000-memory.dmpFilesize
24KB
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memory/2648-16-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2828-17-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2828-19-0x0000000000360000-0x0000000000366000-memory.dmpFilesize
24KB
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memory/2828-20-0x00000000004A0000-0x00000000004A6000-memory.dmpFilesize
24KB
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memory/2828-27-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB