Analysis
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max time kernel
150s -
max time network
154s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 04:27
Behavioral task
behavioral1
Sample
2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe
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Size
41KB
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MD5
43bc089deb3de1b6a1812db4ea3dd60f
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SHA1
f6d041e15282a310e61963ce748a54ee69a467a0
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SHA256
b653cf83b3fde16c9bc5f8817afe2eda6e5105502e7e505b466bc205de09bc40
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SHA512
0040704483ea1508674ccda8a5cdab0804db4d3d5e5b93860856bf12e4f0df6130689df6ee6b9f732db0d833e4ed44d1f1d3cb05490b7249261397dcaf27ded5
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SSDEEP
384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKH9:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKd
Malware Config
Signatures
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Detection of CryptoLocker Variants 6 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\hasfj.exe CryptoLocker_rule2 behavioral1/memory/2588-17-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2256-16-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2256-14-0x0000000002DF0000-0x0000000002DFF000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2256-0-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2588-27-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 6 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\hasfj.exe UPX behavioral1/memory/2588-17-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral1/memory/2256-16-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral1/memory/2256-14-0x0000000002DF0000-0x0000000002DFF000-memory.dmp UPX behavioral1/memory/2256-0-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral1/memory/2588-27-0x0000000008000000-0x000000000800F000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
Processes:
hasfj.exepid process 2588 hasfj.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exepid process 2256 2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe -
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\hasfj.exe upx behavioral1/memory/2588-17-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral1/memory/2256-16-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral1/memory/2256-14-0x0000000002DF0000-0x0000000002DFF000-memory.dmp upx behavioral1/memory/2256-0-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral1/memory/2588-27-0x0000000008000000-0x000000000800F000-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:
2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exedescription pid process target process PID 2256 wrote to memory of 2588 2256 2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe hasfj.exe PID 2256 wrote to memory of 2588 2256 2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe hasfj.exe PID 2256 wrote to memory of 2588 2256 2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe hasfj.exe PID 2256 wrote to memory of 2588 2256 2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe hasfj.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2256 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:2588
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\hasfj.exeFilesize
41KB
MD5f907c220c52cf58261ceb8e214fa6fe8
SHA18a5d86eade53de0d4c30dd60529d6b338541702b
SHA256fa30f95decb04e19216ab79f015c17bc30b19094a21aa3abeaf8bb6c89efc522
SHA512c65e0104c689ccdf9fe1f6d2e70a520300fbd71cdd33a538f2a09d9ecf2a0f67e7c992e4ba996c973195aea1f0c80adbfee36b5eafb0f6702f3a0fb31753d535
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memory/2256-16-0x0000000008000000-0x000000000800F000-memory.dmpFilesize
60KB
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memory/2256-14-0x0000000002DF0000-0x0000000002DFF000-memory.dmpFilesize
60KB
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memory/2256-9-0x0000000001CC0000-0x0000000001CC6000-memory.dmpFilesize
24KB
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memory/2256-2-0x0000000001CE0000-0x0000000001CE6000-memory.dmpFilesize
24KB
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memory/2256-1-0x0000000001CC0000-0x0000000001CC6000-memory.dmpFilesize
24KB
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memory/2256-0-0x0000000008000000-0x000000000800F000-memory.dmpFilesize
60KB
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memory/2588-26-0x0000000000550000-0x0000000000556000-memory.dmpFilesize
24KB
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memory/2588-19-0x0000000000570000-0x0000000000576000-memory.dmpFilesize
24KB
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memory/2588-17-0x0000000008000000-0x000000000800F000-memory.dmpFilesize
60KB
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memory/2588-27-0x0000000008000000-0x000000000800F000-memory.dmpFilesize
60KB