Analysis
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max time kernel
148s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
10-06-2024 11:03
Behavioral task
behavioral1
Sample
2024-06-10_af9dab19ede6e4efb412fc20cb594810_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-10_af9dab19ede6e4efb412fc20cb594810_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-10_af9dab19ede6e4efb412fc20cb594810_cryptolocker.exe
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Size
39KB
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MD5
af9dab19ede6e4efb412fc20cb594810
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SHA1
9bf1ea7b107cbcd67faf2c40f75dc01104f90290
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SHA256
b8f5307298e241c81685570280b344cd2b378947e9065f6ceaac64469bdcb3f0
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SHA512
f69052051ac7b3b6e4c36dfcd6a9be6b9c4a5b213a849bf50c9072df6760ceb9ecfeecfd3af004bf75ccd52c11409433677b61fc1dda3e5e782e938d63b6131c
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan//:qDdFJy3QMOtEvwDpjjWMl7Tdn//
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3720-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002328e-13.dat CryptoLocker_rule2 behavioral2/memory/4568-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3720-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4568-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3720-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000002328e-13.dat CryptoLocker_set1 behavioral2/memory/4568-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3720-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4568-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3720-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000700000002328e-13.dat UPX behavioral2/memory/4568-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3720-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4568-28-0x0000000000500000-0x0000000000510000-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 2024-06-10_af9dab19ede6e4efb412fc20cb594810_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4568 asih.exe -
resource yara_rule behavioral2/memory/3720-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000700000002328e-13.dat upx behavioral2/memory/4568-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3720-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4568-28-0x0000000000500000-0x0000000000510000-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 3720 wrote to memory of 4568 3720 2024-06-10_af9dab19ede6e4efb412fc20cb594810_cryptolocker.exe 82 PID 3720 wrote to memory of 4568 3720 2024-06-10_af9dab19ede6e4efb412fc20cb594810_cryptolocker.exe 82 PID 3720 wrote to memory of 4568 3720 2024-06-10_af9dab19ede6e4efb412fc20cb594810_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_af9dab19ede6e4efb412fc20cb594810_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_af9dab19ede6e4efb412fc20cb594810_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3720 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4568
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD5a5e7e5766de6dac86beffd646d10dd2e
SHA174ad58d83ffb789829f68485ed11b19bda6a1ae2
SHA256bcb115f0753e492ce69ce5af061fd7db59afe9e69927630b19385b71208df5c0
SHA512be015916891368db195a8bcb7e2549f56ef369c299bad2df8f7b5bc57acd923af5026a2bc9d4877948502ffb370593c817c8da6d076f576850cba415a8f8b115