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Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
16/05/2024, 20:06
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-16_ca2a271dd2419233ac035b5c1ada64ed_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-05-16_ca2a271dd2419233ac035b5c1ada64ed_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-16_ca2a271dd2419233ac035b5c1ada64ed_cryptolocker.exe
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Size
71KB
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MD5
ca2a271dd2419233ac035b5c1ada64ed
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SHA1
fd1bd0d6b8810303fc56d2d76c1c95a93784b8b4
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SHA256
3b125f19e4751571a1d991b3fafebcc2200940b9a66662c4077a469a093d4aaa
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SHA512
4f5adea642e141154b72d9934f0a0fa9f2c4a1a709d6310297fc3f9cef4cee7b185e279eb9efc61736a57023d6148ae46547ed5847e3b81c3c174bb95a82d113
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SSDEEP
1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUNZOb:DW60sllyWOtEvwDpjwF85c
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/748-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002328e-13.dat CryptoLocker_rule2 behavioral2/memory/748-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2000-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/748-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000002328e-13.dat CryptoLocker_set1 behavioral2/memory/748-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/2000-18-0x0000000000500000-0x000000000050B000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-05-16_ca2a271dd2419233ac035b5c1ada64ed_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2000 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 748 wrote to memory of 2000 748 2024-05-16_ca2a271dd2419233ac035b5c1ada64ed_cryptolocker.exe 83 PID 748 wrote to memory of 2000 748 2024-05-16_ca2a271dd2419233ac035b5c1ada64ed_cryptolocker.exe 83 PID 748 wrote to memory of 2000 748 2024-05-16_ca2a271dd2419233ac035b5c1ada64ed_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-16_ca2a271dd2419233ac035b5c1ada64ed_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-16_ca2a271dd2419233ac035b5c1ada64ed_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:748 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2000
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD53c5784f63ebecdf1c93495d9a1026187
SHA1868e0cc2ecc1240abef26232432e543598e9bacf
SHA256f20d831aef1d3f90bd4a3b13639ecabd6690273f2ec3953268e3e432f8fe943d
SHA5120591e01e04d60dcb950ff2076f4f6cdb4089d92a87ed31bc064c88d001f876df8417659c9fa73aac6ede054e9415ebbdc8208238cd61fe73908bf2e89e1edd45