Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
02/06/2024, 23:44
Behavioral task
behavioral1
Sample
2024-06-02_07d9d9c4f1c3c9709cacee23b3ebff5c_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-02_07d9d9c4f1c3c9709cacee23b3ebff5c_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-02_07d9d9c4f1c3c9709cacee23b3ebff5c_cryptolocker.exe
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Size
24KB
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MD5
07d9d9c4f1c3c9709cacee23b3ebff5c
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SHA1
ee0e33f0d755f6499b7446f9842f640633cea494
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SHA256
e46cdf1a048d94a7086ffc4b7013855fb6f57fe124f66ed952b98a1f5df35a72
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SHA512
cb2d79dbfd96204c54ee87417b9593442cee197d6f165dc2a9d48944f68d654bdd6c0d2093f23ff1f3a96036277b0c7d0d4d04ba21ad6c4d1af50723623402e5
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SSDEEP
384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ/O6:bVCPwFRo6CpwXFXSqQXfjAsJ/O6
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4220-0-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000233fd-13.dat CryptoLocker_rule2 behavioral2/memory/4220-18-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4264-27-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/4220-0-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/files/0x00090000000233fd-13.dat UPX behavioral2/memory/4220-18-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/memory/4264-27-0x0000000008000000-0x000000000800E000-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 2024-06-02_07d9d9c4f1c3c9709cacee23b3ebff5c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4264 hasfj.exe -
resource yara_rule behavioral2/memory/4220-0-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/files/0x00090000000233fd-13.dat upx behavioral2/memory/4220-18-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/memory/4264-27-0x0000000008000000-0x000000000800E000-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 4220 wrote to memory of 4264 4220 2024-06-02_07d9d9c4f1c3c9709cacee23b3ebff5c_cryptolocker.exe 82 PID 4220 wrote to memory of 4264 4220 2024-06-02_07d9d9c4f1c3c9709cacee23b3ebff5c_cryptolocker.exe 82 PID 4220 wrote to memory of 4264 4220 2024-06-02_07d9d9c4f1c3c9709cacee23b3ebff5c_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_07d9d9c4f1c3c9709cacee23b3ebff5c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_07d9d9c4f1c3c9709cacee23b3ebff5c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4220 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:4264
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
24KB
MD517417459107a26876fb61380bf6958b2
SHA170e3b51fd6a91918d72eed4a05b6814319ad8c95
SHA256431685f3e575b234b12f1f9f8a7d6d2a6c2823f8c68880a93308518efc5fd0fc
SHA512f290ade12a4f332ea28dafe68e57804bf1bb5469a6901657266ff9487a0efc4fda746de74cc973a0df1bd686dde3301777587d8e269c6fdadb53e2cee0c1380a