Analysis
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max time kernel
150s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
11/03/2024, 23:26
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-11_4d858e3f434a4cc64e1ab197a199e594_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-11_4d858e3f434a4cc64e1ab197a199e594_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-11_4d858e3f434a4cc64e1ab197a199e594_cryptolocker.exe
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Size
39KB
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MD5
4d858e3f434a4cc64e1ab197a199e594
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SHA1
91898de39a4d5e65cd189247891a7282d5cf29aa
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SHA256
9bc04c729a9413d451f38ca7787cb39906c6dcc06d9aff818fe7d57253484b43
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SHA512
9895bafce2052f7f58473e69af22570efc5b24777109b6def5e949ab2fd457dc4349935148555a63579847ddc4d98e5bdda36b32857b4c5e514dc8b04805ae44
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SSDEEP
768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvgpnYY:m5nkFNMOtEvwDpjG8hgpYY
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1856-0-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002320a-13.dat CryptoLocker_rule2 behavioral2/memory/1856-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3352-26-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/1856-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 behavioral2/memory/3352-26-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/1856-0-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000800000002320a-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/1856-17-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3352-26-0x0000000000500000-0x000000000050E000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation 2024-03-11_4d858e3f434a4cc64e1ab197a199e594_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3352 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 1856 wrote to memory of 3352 1856 2024-03-11_4d858e3f434a4cc64e1ab197a199e594_cryptolocker.exe 89 PID 1856 wrote to memory of 3352 1856 2024-03-11_4d858e3f434a4cc64e1ab197a199e594_cryptolocker.exe 89 PID 1856 wrote to memory of 3352 1856 2024-03-11_4d858e3f434a4cc64e1ab197a199e594_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-11_4d858e3f434a4cc64e1ab197a199e594_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-11_4d858e3f434a4cc64e1ab197a199e594_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1856 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:3352
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD5c02cda5b877843e0defff0de677e3ace
SHA1a5954af237a95e93bfa2c35347a6a589b30ecdb7
SHA256f1e208cc438f2043b1435077e48e61d2b827385f6c740356699caad584e0b2fa
SHA5120a279663e92e0c4ebfabdd89ed1efe09229e9917578da54926db6b83fc33e94730428c5003d694b63c97dba7838ab055f46068da26a626cd611a3f0db1a7e757