Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
12-02-2024 17:44
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exe
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Size
32KB
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MD5
957473a6f39ed0436d3969b08bacc84b
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SHA1
80e9715f6b2bcd635b06c8011acd2a3b281560a4
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SHA256
eb2c9a0961480f91a65a4ef38e9ed07eca3e9acce5866848ae74a89e0d1e447b
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SHA512
4bb6406f306a2077b98f5903463d445b9a52dcb4167841e14567c05a2a3807f2afb54fe7da22680d092634df725275f1203fcdba76352490e08a3cfbaed630e9
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SSDEEP
384:bmM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzoCt9/B1RwFta:b7o/2n1TCraU6GD1a4Xt9bRwS
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\rewok.exe CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
rewok.exepid process 3028 rewok.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
Processes:
2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exedescription pid process target process PID 1600 wrote to memory of 3028 1600 2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exe rewok.exe PID 1600 wrote to memory of 3028 1600 2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exe rewok.exe PID 1600 wrote to memory of 3028 1600 2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exe rewok.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_957473a6f39ed0436d3969b08bacc84b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1600 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
PID:3028
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
32KB
MD54f095847d407df28a1513143ca12ac23
SHA1497e8d5bf4f863637d753514c44d9177a818d50b
SHA256f6cb40ada8cc563e908739ac4c07535acc480952f648ce5b9aa02431e39cc6e6
SHA512a1ad503807abc269a0d09908953361e6e83ca81ed1cce082e4e6bb0b90ebbf7b12386d571564e94db3fd3b3632353974259b130a5557c99ab452a7e549aa4252