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Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
01/07/2024, 21:36
Behavioral task
behavioral1
Sample
2024-07-01_a269b2e6baa1aa2d07c66b55409fa24f_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-07-01_a269b2e6baa1aa2d07c66b55409fa24f_cryptolocker.exe
Resource
win10v2004-20240611-en
General
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Target
2024-07-01_a269b2e6baa1aa2d07c66b55409fa24f_cryptolocker.exe
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Size
37KB
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MD5
a269b2e6baa1aa2d07c66b55409fa24f
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SHA1
8d6b1dce0263568302b53b826bf7095e408f2467
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SHA256
b5278d908a88821d5b6da16e7a2e948f92cfc64a276780b8a33b73ac80b166a6
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SHA512
269f8307a5c852881104d69679ec579c456dd6e4ad7fcef88399959dd3316a2ed11e4ff2e5a0ff15ca4ce20a9860fbd372970576c374885c83c3ca36c949233f
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITf:qDdFJy3QMOtEvwDpjjWMl7Tf
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000a000000023499-13.dat CryptoLocker_rule2 behavioral2/memory/4620-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2252-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4620-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000a000000023499-13.dat CryptoLocker_set1 behavioral2/memory/4620-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2252-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4620-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000a000000023499-13.dat UPX behavioral2/memory/4620-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2252-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4620-27-0x0000000000500000-0x0000000000510000-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-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation 2024-07-01_a269b2e6baa1aa2d07c66b55409fa24f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4620 asih.exe -
resource yara_rule behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000a000000023499-13.dat upx behavioral2/memory/4620-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2252-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4620-27-0x0000000000500000-0x0000000000510000-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 2252 wrote to memory of 4620 2252 2024-07-01_a269b2e6baa1aa2d07c66b55409fa24f_cryptolocker.exe 88 PID 2252 wrote to memory of 4620 2252 2024-07-01_a269b2e6baa1aa2d07c66b55409fa24f_cryptolocker.exe 88 PID 2252 wrote to memory of 4620 2252 2024-07-01_a269b2e6baa1aa2d07c66b55409fa24f_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-07-01_a269b2e6baa1aa2d07c66b55409fa24f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-07-01_a269b2e6baa1aa2d07c66b55409fa24f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2252 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4620
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
37KB
MD5e461f5610c00f0aac25be1bf7c29f014
SHA1a144355d537581dcde2b037e1a925f3eb2a13271
SHA2560d6874182c1f59902aa19293aa03cbf2a98dbf1b19a0697b61b90a278e2c8778
SHA512f338a84a2cd4385edb6623b666e812a94eceef16cbfbd45eedb087e6d4ccb54cf69e19df08504c12a7c39fe51e937b76b1c944159d8ba377e845aac61f315a36