Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
27/03/2024, 10:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-27_e4687f2936a286a97a973ae363be0436_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-27_e4687f2936a286a97a973ae363be0436_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-03-27_e4687f2936a286a97a973ae363be0436_cryptolocker.exe
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Size
40KB
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MD5
e4687f2936a286a97a973ae363be0436
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SHA1
2a7ceeb920e15f4bcd7336dcc47f66d0595c422d
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SHA256
895fe052414034e070423e9e577f15406ee7755ff6bc9b364668fc06d9726728
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SHA512
53e73c7237bd907b241bb7d7b154f11db58c5085d9371f58abd3ed0f445fe0c0841bfe52348f03f3240bdf2d181e06c3b4fef3b997087f1593db4d7cb4eec35a
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SSDEEP
768:XS5nQJ24LR1bytOOtEvwDpj66BLbjG9RzhwaO4f:i5nkFGMOtEvwDpjR+TR
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3632-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c00000002315b-13.dat CryptoLocker_rule2 behavioral2/memory/824-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3632-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/824-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/824-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3632-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/824-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 5 IoCs
resource yara_rule behavioral2/memory/3632-0-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000c00000002315b-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/824-18-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3632-17-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/824-27-0x0000000000500000-0x000000000050F000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation 2024-03-27_e4687f2936a286a97a973ae363be0436_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 824 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 3632 wrote to memory of 824 3632 2024-03-27_e4687f2936a286a97a973ae363be0436_cryptolocker.exe 84 PID 3632 wrote to memory of 824 3632 2024-03-27_e4687f2936a286a97a973ae363be0436_cryptolocker.exe 84 PID 3632 wrote to memory of 824 3632 2024-03-27_e4687f2936a286a97a973ae363be0436_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-27_e4687f2936a286a97a973ae363be0436_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-27_e4687f2936a286a97a973ae363be0436_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3632 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:824
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD51fb312051ac83958c9fceb777b6145a0
SHA1c0214e23236d77bb3c423094a2d7f730187a2f9a
SHA256c782b177bcef7379e17ea26b6464a0bdbdf8f9c764ae3168a32b242b3e039daa
SHA512d13eb611b817e7de083f878dd3323c69ee1089fe6158b8acd45fd13b7f7b65ba6d89baf513e34c04464eb42beeaabd91b1a83b17f4ec861b339692df87245366