Analysis
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max time kernel
148s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
13-06-2024 02:52
Behavioral task
behavioral1
Sample
2024-06-13_6a809ffecf50e550d89f100a6aefbe42_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-13_6a809ffecf50e550d89f100a6aefbe42_cryptolocker.exe
Resource
win10v2004-20240611-en
General
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Target
2024-06-13_6a809ffecf50e550d89f100a6aefbe42_cryptolocker.exe
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Size
98KB
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MD5
6a809ffecf50e550d89f100a6aefbe42
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SHA1
522560f66ee16273cad603029d829acc5ac99933
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SHA256
72d693fdc25d25429a7084db88db2603b304fbf95cc126c905fd3236b8e71713
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SHA512
d6328190d209f485924031f23d84a810fbdb9af4da61cac1ccff797c4216d33f7e824632b71014f89ef1e54896e7d90c4c8194d2cae1fa843c01d98e85dd7cd4
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01m:AnBdOOtEvwDpj6zY
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1544-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00050000000232b2-13.dat CryptoLocker_rule2 behavioral2/memory/1544-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3348-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1544-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00050000000232b2-13.dat CryptoLocker_set1 behavioral2/memory/1544-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3348-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/1544-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x00050000000232b2-13.dat UPX behavioral2/memory/1544-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3348-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation 2024-06-13_6a809ffecf50e550d89f100a6aefbe42_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3348 asih.exe -
resource yara_rule behavioral2/memory/1544-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x00050000000232b2-13.dat upx behavioral2/memory/1544-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3348-26-0x0000000000500000-0x000000000050F000-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
description pid Process procid_target PID 1544 wrote to memory of 3348 1544 2024-06-13_6a809ffecf50e550d89f100a6aefbe42_cryptolocker.exe 82 PID 1544 wrote to memory of 3348 1544 2024-06-13_6a809ffecf50e550d89f100a6aefbe42_cryptolocker.exe 82 PID 1544 wrote to memory of 3348 1544 2024-06-13_6a809ffecf50e550d89f100a6aefbe42_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_6a809ffecf50e550d89f100a6aefbe42_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_6a809ffecf50e550d89f100a6aefbe42_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1544 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3348
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
98KB
MD501d9df4c038d2466afb8cce788b114ee
SHA13f6c96883a43aa575496740f111eb40bc8334c9b
SHA2568b2f7229887fdb9323b65b9287f76b2c7ebae917f4de5d7fc9cceff864702b8c
SHA51299e70a788e5f7fc487f62191addf9fcc8ffe406c1edd2f462a592f7d141a3dc76df97d89c520aed54c7558cec2ea51fbb64f6265737a397761289fc2f1e1e7e6