Analysis
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max time kernel
149s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
25-01-2024 15:36
Behavioral task
behavioral1
Sample
2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe
Resource
win7-20231215-en
General
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Target
2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe
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Size
84KB
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MD5
635074331b22720dc167130b5d9689f8
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SHA1
ee774be8d1a5c4b11107bc38e12d04c69753bd21
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SHA256
b296ee98ab66956634dc3d0017808c6271ea4bf7ed6707a2086548e993d00453
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SHA512
eee5f73fd785556be822a5d80c81649900320edccb4071ebe771c8719da721f3a91457930c6d25b11548d73055699018c8d07be79f01f0c1bc7a120a8c19d047
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SSDEEP
768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIcFo:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgs
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
Processes:
resource yara_rule behavioral2/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/1008-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5048-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
Processes:
resource yara_rule behavioral2/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/1008-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/5048-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
Processes:
resource yara_rule behavioral2/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/1008-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/5048-26-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation 2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 5048 asih.exe -
Processes:
resource yara_rule behavioral2/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/1008-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/5048-26-0x0000000000500000-0x000000000050F000-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
Processes:
2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exedescription pid process target process PID 1008 wrote to memory of 5048 1008 2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe asih.exe PID 1008 wrote to memory of 5048 1008 2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe asih.exe PID 1008 wrote to memory of 5048 1008 2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1008 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:5048
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
84KB
MD5c22dad6ec39a65ba04f40f8562ffedd9
SHA1c8b93fb78879e20412ba1de20935a8512fc39e9a
SHA256cfe3d6aa61cebcf1c48a9240f4a9d967cd34f93992d4c2ba48830397d55c6177
SHA5124696d417d808fbe41dd73d98bf9e3312681218bf68141e60cc3334c401b08cb0e1430e3d9e5e164eeb8875b65e4a15211154f56d80f085288e96a532daaeb1fc
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memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/1008-1-0x00000000006C0000-0x00000000006C6000-memory.dmpFilesize
24KB
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memory/1008-2-0x00000000006C0000-0x00000000006C6000-memory.dmpFilesize
24KB
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memory/1008-3-0x00000000006E0000-0x00000000006E6000-memory.dmpFilesize
24KB
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memory/1008-17-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/5048-19-0x0000000000660000-0x0000000000666000-memory.dmpFilesize
24KB
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memory/5048-21-0x0000000000640000-0x0000000000646000-memory.dmpFilesize
24KB
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memory/5048-26-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB