Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
20/04/2024, 00:51
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe
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Size
69KB
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MD5
cef42451928080211c4447b4d253025a
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SHA1
0b995833d6352493a821fe33a649988f3856d4b2
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SHA256
f255481163ab8077a97f60d879b64227fb2060397aa5304a6098dd7cd1b7a930
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SHA512
57e0779f6bf430e15e65d609b27ed4227e3ed4aa4b9a6e64e1062c46e002017601dfb3df57a436ee4bda6b2db8b170ec9c70bca245991b22d89ed46d7d9273f3
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SSDEEP
1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKU50i:DW60sllyWOtEvwDpjwF85t
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/4280-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000300000001e97c-13.dat CryptoLocker_rule2 behavioral2/memory/4280-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4280-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000300000001e97c-13.dat CryptoLocker_set1 behavioral2/memory/4280-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 -
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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation 2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4452 asih.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 4280 wrote to memory of 4452 4280 2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe 85 PID 4280 wrote to memory of 4452 4280 2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe 85 PID 4280 wrote to memory of 4452 4280 2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4280 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4452
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
70KB
MD5dc53bd2ac6037be845c1e4ec4fe15968
SHA1225d64e7e4319e92292e34d701ac8a0789030d94
SHA2560bfa7227e7a800caa084bb5e97c9bc06dd71ba6922951ddb611fee15289df5b1
SHA512053600368596a04d81dad2b13948d4654fa95dfe0ff35f797c8fdaafe2a9b98e2887f0377104fe221310b3a2d74c7bfbe034caf10e70e5119c73b0ed528962fb