Analysis
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max time kernel
150s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
18-02-2024 23:01
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-18_a0f0e2e21bd2938e944c07399c51b5b5_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-18_a0f0e2e21bd2938e944c07399c51b5b5_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-18_a0f0e2e21bd2938e944c07399c51b5b5_cryptolocker.exe
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Size
40KB
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MD5
a0f0e2e21bd2938e944c07399c51b5b5
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SHA1
e78c56a9befb7c15c761a0596887eb07317f064c
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SHA256
b8ebc72dfbec42de65777e98a57c8e0c637526a44f62303e847c6dba548599e6
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SHA512
62fa19cde2c75e71683cf84714de99cad4d91b270fd54ff39dfe4e9a299d0dfdbd826b5ddb7f7c6f7e7c80efbf22be5c6db209301306db6957787b758c0fc000
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SSDEEP
768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRrN:m5nkFNMOtEvwDpjG8hhXT
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/2532-0-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000600000002324b-13.dat CryptoLocker_rule2 behavioral2/memory/2532-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2172-26-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/2532-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 behavioral2/memory/2172-26-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/2532-0-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000600000002324b-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/2532-17-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/2172-26-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress -
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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation 2024-02-18_a0f0e2e21bd2938e944c07399c51b5b5_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2172 misid.exe -
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 2532 wrote to memory of 2172 2532 2024-02-18_a0f0e2e21bd2938e944c07399c51b5b5_cryptolocker.exe 83 PID 2532 wrote to memory of 2172 2532 2024-02-18_a0f0e2e21bd2938e944c07399c51b5b5_cryptolocker.exe 83 PID 2532 wrote to memory of 2172 2532 2024-02-18_a0f0e2e21bd2938e944c07399c51b5b5_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-18_a0f0e2e21bd2938e944c07399c51b5b5_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-18_a0f0e2e21bd2938e944c07399c51b5b5_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2532 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:2172
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD593b5e575710b0da6da11c7467214e2d9
SHA153933c4449286b1b8b49be679fc7b2acf86f5053
SHA256b24ee8a6d79c1ab8bd5c1ee04445e53049ec39ca1ab4fa1482f9e9f9b5889766
SHA512b66175e2d723dd62fcdcb0080b35dba20641bedaf5c01753a6744d4912a55111c73b4315ec66b0e6ee683a123de4727857b20020634c28e576310749ef574fb5