Analysis
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max time kernel
148s -
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
25-05-2024 06:38
Behavioral task
behavioral1
Sample
2024-05-25_7a0a67346a3145b756e1248ce39722c6_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-25_7a0a67346a3145b756e1248ce39722c6_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-25_7a0a67346a3145b756e1248ce39722c6_cryptolocker.exe
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Size
66KB
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MD5
7a0a67346a3145b756e1248ce39722c6
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SHA1
70ce2b0a6ca51b135581ad79e9b53323b61b22d3
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SHA256
e4d26b2ab01b98e470f0c07694e6ff034980b0f5b63844e240b773aaca3d0110
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SHA512
b2b556e54f94472573eb7e22ed7d99de8d7730f259da0507a842d12f6da42e94e0d6ca6fcf419a91ecf36158f1e974b02da1e1887a20acf621edb1979617f848
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDyfz:1nK6a+qdOOtEvwDpjg
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4868-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000a00000002328e-13.dat CryptoLocker_rule2 behavioral2/memory/4868-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/1560-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/1560-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4868-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/files/0x000a00000002328e-13.dat CryptoLocker_set1 behavioral2/memory/4868-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/1560-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/1560-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4868-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/files/0x000a00000002328e-13.dat UPX behavioral2/memory/4868-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/1560-18-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/1560-26-0x0000000000500000-0x000000000050F311-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 2024-05-25_7a0a67346a3145b756e1248ce39722c6_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1560 asih.exe -
resource yara_rule behavioral2/memory/4868-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x000a00000002328e-13.dat upx behavioral2/memory/4868-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/1560-18-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/1560-26-0x0000000000500000-0x000000000050F311-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 4868 wrote to memory of 1560 4868 2024-05-25_7a0a67346a3145b756e1248ce39722c6_cryptolocker.exe 83 PID 4868 wrote to memory of 1560 4868 2024-05-25_7a0a67346a3145b756e1248ce39722c6_cryptolocker.exe 83 PID 4868 wrote to memory of 1560 4868 2024-05-25_7a0a67346a3145b756e1248ce39722c6_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-25_7a0a67346a3145b756e1248ce39722c6_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-25_7a0a67346a3145b756e1248ce39722c6_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4868 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1560
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
67KB
MD5d3d42068dbe3245b0f62faadefc7da85
SHA11784e751c67363b8030a84c6f9708b18d33001f1
SHA256ffd3cf0c332b4ff940306a3f2953672c582b8fdf1d0a4c50b6b51e7574deb1c2
SHA512c7c9c4d12798c328cba54bee1baba3ee53af025a76ade96d8b9399f4c7b01179c7f38a437375fd82b6efce2fc03ef6ad3047ed7c18f0cb3b9fbf0dc53d5988be