Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
22-05-2024 02:30
Behavioral task
behavioral1
Sample
2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe
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Size
52KB
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MD5
4128b390510f077b44e9fa8f6386e29d
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SHA1
61420ea5ea4adc341c41e17a5f80aaa2eed553a8
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SHA256
57ed788d93e70b4ecd4b371261f230dbf010878247fee02a97d5342446ec7fe5
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SHA512
905a95c1a528b171e46f30bdfd9f450139d021b0d3b1d7118978ddf6264fc7199e8e0dd5bdec59fe8d55d87f9c6e994002b11037685b08ff1f741954b14fda33
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SSDEEP
768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOmK:z6QFElP6n+gKmddpMOtEvwDpj31imK
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
Processes:
resource yara_rule behavioral1/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral1/memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/1532-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
Processes:
resource yara_rule behavioral1/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral1/memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/1532-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
Processes:
resource yara_rule behavioral1/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX \Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral1/memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/1532-25-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 1532 asih.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exepid process 1704 2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe -
Processes:
resource yara_rule behavioral1/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp upx \Users\Admin\AppData\Local\Temp\asih.exe upx behavioral1/memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/1532-25-0x0000000000500000-0x0000000000510000-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:
2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exedescription pid process target process PID 1704 wrote to memory of 1532 1704 2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe asih.exe PID 1704 wrote to memory of 1532 1704 2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe asih.exe PID 1704 wrote to memory of 1532 1704 2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe asih.exe PID 1704 wrote to memory of 1532 1704 2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-22_4128b390510f077b44e9fa8f6386e29d_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
52KB
MD5652802d153b877f727405c4a9a8a0454
SHA1a5e3002dec2dae8729c0be926d1679ef2848978f
SHA256538b84de6b3f34de4b562a8b47ebd56bdca3ee0499ee916cbc3d7a0a3f672a3a
SHA5128b561c1f320a9beb2b89b626809b71bd299be8916ec5d4d6dbe13e7d2191297d7ca18fe2ce4beb18464cea696bbcd60385d7c1e97c8c2a250819d80c7d0c67b1
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memory/1532-17-0x0000000000460000-0x0000000000466000-memory.dmpFilesize
24KB
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memory/1532-25-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/1532-24-0x00000000002C0000-0x00000000002C6000-memory.dmpFilesize
24KB
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memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/1704-1-0x00000000002D0000-0x00000000002D6000-memory.dmpFilesize
24KB
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memory/1704-2-0x0000000000610000-0x0000000000616000-memory.dmpFilesize
24KB
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memory/1704-9-0x00000000002D0000-0x00000000002D6000-memory.dmpFilesize
24KB
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memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB