Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 21:45
Behavioral task
behavioral1
Sample
2024-06-10_f934fae6bfbb6268566f86cd9b38e5ec_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-10_f934fae6bfbb6268566f86cd9b38e5ec_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-10_f934fae6bfbb6268566f86cd9b38e5ec_cryptolocker.exe
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Size
95KB
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MD5
f934fae6bfbb6268566f86cd9b38e5ec
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SHA1
b8b2f58ffdd8d5b7540da4c0b9c758510a2e38de
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SHA256
2c571c3a1e8a8d5e005c8f2e58124ecb37aa4e10449898c5a4e44a84088476eb
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SHA512
272bfd95a4ae65a05f69ee62bb2855e2366fb4aada134be003a5711fcbd0859c162a216b613af9b7ef23619ba53e7c1ee2ea72e9ed841c058f2e824468212b61
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SSDEEP
1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/ks:zCsanOtEvwDpjB3
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000233f8-13.dat CryptoLocker_rule2 behavioral2/memory/116-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2636-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00090000000233f8-13.dat CryptoLocker_set1 behavioral2/memory/116-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2636-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00090000000233f8-13.dat UPX behavioral2/memory/116-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2636-26-0x0000000000500000-0x0000000000510000-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 2024-06-10_f934fae6bfbb6268566f86cd9b38e5ec_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2636 misid.exe -
resource yara_rule behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00090000000233f8-13.dat upx behavioral2/memory/116-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2636-26-0x0000000000500000-0x0000000000510000-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 116 wrote to memory of 2636 116 2024-06-10_f934fae6bfbb6268566f86cd9b38e5ec_cryptolocker.exe 82 PID 116 wrote to memory of 2636 116 2024-06-10_f934fae6bfbb6268566f86cd9b38e5ec_cryptolocker.exe 82 PID 116 wrote to memory of 2636 116 2024-06-10_f934fae6bfbb6268566f86cd9b38e5ec_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_f934fae6bfbb6268566f86cd9b38e5ec_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_f934fae6bfbb6268566f86cd9b38e5ec_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:116 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:2636
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
95KB
MD520076eeb62778de2b539f028c7afa874
SHA1e1b5892d1b295ad42a0d6e8a30231ce9546685ad
SHA256d18e94dbd0c07915be65c192df3528432cdc1d4d35f020e3aee30f83b122d563
SHA512fc8df1bf5e7587aa94f933357fe967c946b51463ab3f4dd6c71f2e3edf528865d77e3948deb485421d9a2d379cd1d2fc8d81ada77660a3e59afae6381c2b3713