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
06/06/2024, 21:35
Behavioral task
behavioral1
Sample
2024-06-06_cb7bf86ef245dda0b3b347c2eedf287f_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-06_cb7bf86ef245dda0b3b347c2eedf287f_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-06_cb7bf86ef245dda0b3b347c2eedf287f_cryptolocker.exe
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Size
60KB
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MD5
cb7bf86ef245dda0b3b347c2eedf287f
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SHA1
64305d1f1f5a6f480f311f6bec48a98c20c17198
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SHA256
3c4954218eac6a224125c94835bbb28cc952ef0fad93e058c55b732abff3687d
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SHA512
a0c9193ab3eb3f8a4d960d40609c7f717d4aee147e6a56606b9a70d5809f60c790b0005cce6ebea65c9f1810c4a4e685ca6d7052cdd5fc09bc5ef6800fda4309
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SSDEEP
768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP3qhQ:H6QFElP6n+gou9cvMOtEvwDpjCpVXhhQ
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4648-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00080000000233dc-13.dat CryptoLocker_rule2 behavioral2/memory/4712-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4648-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4712-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4648-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00080000000233dc-13.dat CryptoLocker_set1 behavioral2/memory/4712-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4648-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4712-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4648-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00080000000233dc-13.dat UPX behavioral2/memory/4712-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4648-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4712-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 2024-06-06_cb7bf86ef245dda0b3b347c2eedf287f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4712 asih.exe -
resource yara_rule behavioral2/memory/4648-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00080000000233dc-13.dat upx behavioral2/memory/4712-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4648-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4712-27-0x0000000000500000-0x0000000000510000-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 4648 wrote to memory of 4712 4648 2024-06-06_cb7bf86ef245dda0b3b347c2eedf287f_cryptolocker.exe 82 PID 4648 wrote to memory of 4712 4648 2024-06-06_cb7bf86ef245dda0b3b347c2eedf287f_cryptolocker.exe 82 PID 4648 wrote to memory of 4712 4648 2024-06-06_cb7bf86ef245dda0b3b347c2eedf287f_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-06_cb7bf86ef245dda0b3b347c2eedf287f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-06_cb7bf86ef245dda0b3b347c2eedf287f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4648 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4712
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60KB
MD58f8566445173ee20a703809e19c82354
SHA187fc5254ff25ea1c7dfa4851f28e9c17950192fe
SHA25626496d4f35cd11c9185525025c7711313c1da46be326fed4dadd5365f9291454
SHA512fddc22e49190e9c91969d13d51d74e6b3581dc1c62fd52d1709ccdfbf2fdba7610da04508b10c4d00e95cb64d052625c2f18887b1ec66fce2d4e7a7924b98dad