Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
04-02-2024 19:27
Behavioral task
behavioral1
Sample
2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe
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Size
64KB
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MD5
3dd5d1cac7c05313513c9f87a6da1360
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SHA1
d133a313163383db58b680b9a92700573801058d
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SHA256
4130b86f2a091273261b0e96dc6d3a48ab589660dee3aee73f96068f6d7ade9e
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SHA512
619e844e5bfb3651533471bf438c3411bb59c99e539cea72d9c2ea640ff651890ecde51109d5f6066991617b86496a0b5c7bc22c119d20915d3103274ce5c20c
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUa1Fr:T6a+rdOOtEvwDpjNL
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3236-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002325a-13.dat CryptoLocker_rule2 behavioral2/memory/3236-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2720-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2720-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3236-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000002325a-13.dat CryptoLocker_set1 behavioral2/memory/3236-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2720-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2720-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3236-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000700000002325a-13.dat UPX behavioral2/memory/3236-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2720-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2720-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2720 asih.exe -
resource yara_rule behavioral2/memory/3236-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000700000002325a-13.dat upx behavioral2/memory/3236-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2720-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2720-27-0x0000000000500000-0x0000000000510000-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 3 IoCs
description pid Process procid_target PID 3236 wrote to memory of 2720 3236 2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe 87 PID 3236 wrote to memory of 2720 3236 2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe 87 PID 3236 wrote to memory of 2720 3236 2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3236 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2720
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
65KB
MD59b702b4b98793a5d1a367bff2f6fb7a1
SHA12fb6b764af304493d5d5047e939ef5d4a83ad595
SHA256d3243ea26c9144b2ab47d45a4a4a5ca8a25133f8b7e6ecfcf6bba6c6d05756b7
SHA512697f86db1d9ab2f015bc70c26780c753d753fc662536d2238f8fac175fc15c10bd3e81cdf141ba4c3519dc6e54d679472682f086b7a944be241a821f56ad8157