Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
27-04-2024 22:31
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exe
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Size
62KB
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MD5
56df5f047f1fee9a942219fd65a531cd
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SHA1
80dcb354334acb5e411cddfae6cc2b532f1fe527
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SHA256
eb780842f932c9bca73c93ea973a03819a1810b3f9d5622c1f89c5def168fa13
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SHA512
492db5e9864d33153c0d5abe48d39c75637767b1bad3014100149b0601e2d7cd01b502af59e7ad30a4752651e3586e8f31b470cde93880ce1b6515484537b13d
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsi0:BbdDmjr+OtEvwDpjM89
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
Processes:
resource yara_rule behavioral2/memory/4588-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/4588-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2860-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
Processes:
resource yara_rule behavioral2/memory/4588-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2860-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
Processes:
resource yara_rule behavioral2/memory/4588-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/4588-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2860-26-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation 2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 2860 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
Processes:
2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exedescription pid process target process PID 4588 wrote to memory of 2860 4588 2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exe asih.exe PID 4588 wrote to memory of 2860 4588 2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exe asih.exe PID 4588 wrote to memory of 2860 4588 2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-27_56df5f047f1fee9a942219fd65a531cd_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4588 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2860
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
62KB
MD5db217db08481a0266fc25a7e503c616f
SHA121b56a96e2c354f334249447ed728cbc7333a34d
SHA256368c4b669e643c5fdffc900a5c053dab31fa70de55b042877d21461315431d1a
SHA512f85dbf81a755a278ae82b89db4f6372242e2550dfe90e60d8b035ef1b46307cdff27dc6d4e41dee70a1865b72f1987d377d23ed0c3f3983cf50270083e903171
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memory/2860-19-0x00000000006D0000-0x00000000006D6000-memory.dmpFilesize
24KB
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memory/2860-25-0x00000000006B0000-0x00000000006B6000-memory.dmpFilesize
24KB
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memory/2860-26-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/4588-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/4588-1-0x0000000002050000-0x0000000002056000-memory.dmpFilesize
24KB
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memory/4588-2-0x0000000002050000-0x0000000002056000-memory.dmpFilesize
24KB
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memory/4588-3-0x0000000002070000-0x0000000002076000-memory.dmpFilesize
24KB
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memory/4588-16-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB