Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
03/06/2024, 07:44
Behavioral task
behavioral1
Sample
2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe
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Size
91KB
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MD5
c489b30c1613bf60f71f6bc81d6a82f3
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SHA1
427718deb37efe1ff55e8cdeaed2c3bdb092b1d2
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SHA256
5d6f29a54e4ebee9959e286bf49ee4e3ff280edb6231c87eaba4532f14af7915
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SHA512
10f9c14c15b00337903441ed56e48bb4d287bae4ef5142262cca26f1ba49fd28eb2af5f8d3a778582f0dbf25e36ef5d864858a8374a97544028b38d15025a882
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyN:n6a+1SEOtEvwDpjYYvQd2P0
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000900000002340c-13.dat CryptoLocker_rule2 behavioral2/memory/3360-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3360-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000900000002340c-13.dat CryptoLocker_set1 behavioral2/memory/3360-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3360-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000900000002340c-13.dat UPX behavioral2/memory/3360-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3360-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3360 asih.exe -
resource yara_rule behavioral2/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000900000002340c-13.dat upx behavioral2/memory/3360-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3360-27-0x0000000000500000-0x0000000000510000-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 2356 wrote to memory of 3360 2356 2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe 83 PID 2356 wrote to memory of 3360 2356 2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe 83 PID 2356 wrote to memory of 3360 2356 2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2356 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3360
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
91KB
MD51cc32f094c3f4a57673425f9654fc033
SHA18d2e94ec7b62778a478eecb31c9764d8501b384b
SHA2566daa110754b84c3705318b61d3e7ade22101bfd17f72709694b6e36b4ed00898
SHA512e3961b4d426a93956b7b0a18081d961fef59b85596509ea84edfeeff36d3b118a8aa2536edd3c326d87b326a79c28b6aa7a2eda33b3a89ca116155bda6d6f4f3