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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
24/04/2024, 19:35
Behavioral task
behavioral1
Sample
2024-04-24_4d54a0679334593778e2160b1bda74dd_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-24_4d54a0679334593778e2160b1bda74dd_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-24_4d54a0679334593778e2160b1bda74dd_cryptolocker.exe
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Size
38KB
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MD5
4d54a0679334593778e2160b1bda74dd
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SHA1
27a0dbb3141db1feb452c4801d86b983fc04014d
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SHA256
c3406a76f679738bd51957e3ab08d7faa504b0fb3232264f654638bc5394d944
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SHA512
19127f816e56ccd3cca5a94086de3e80bb024d491a4b46bd944a667747cf92432519e76b4ec1f6de1d0d8c55fd7aaffcb8d94efebb18f41022fd44a64eb22883
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaaU3:qDdFJy3QMOtEvwDpjjWMl7TdaU3
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/888-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000300000001e97a-13.dat CryptoLocker_rule2 behavioral2/memory/1856-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/888-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1856-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/888-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000300000001e97a-13.dat CryptoLocker_set1 behavioral2/memory/1856-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/888-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1856-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/888-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000300000001e97a-13.dat UPX behavioral2/memory/1856-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/888-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1856-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation 2024-04-24_4d54a0679334593778e2160b1bda74dd_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1856 asih.exe -
resource yara_rule behavioral2/memory/888-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000300000001e97a-13.dat upx behavioral2/memory/1856-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/888-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1856-27-0x0000000000500000-0x0000000000510000-memory.dmp upx -
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 888 wrote to memory of 1856 888 2024-04-24_4d54a0679334593778e2160b1bda74dd_cryptolocker.exe 85 PID 888 wrote to memory of 1856 888 2024-04-24_4d54a0679334593778e2160b1bda74dd_cryptolocker.exe 85 PID 888 wrote to memory of 1856 888 2024-04-24_4d54a0679334593778e2160b1bda74dd_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-24_4d54a0679334593778e2160b1bda74dd_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-24_4d54a0679334593778e2160b1bda74dd_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:888 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1856
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD5dd5c847c7c5f4069e90dc9e7b55264cc
SHA1cf04e106db15f27d53574e2bde5cbc2a8edad8e5
SHA2564bbc7cf7eafb7df93a3d9c2082d344521e02313f3e731c66f116ba4df5d28fdd
SHA512180c59ee322870a811f102478976a126df244440806f138933a79099a20f77ed72e220fd89d08d14b567c61acce4cff9038f1b7200624e559b332a446af459cf