Analysis
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max time kernel
150s -
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
13-06-2024 11:47
Behavioral task
behavioral1
Sample
2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exe
Resource
win7-20240611-en
Behavioral task
behavioral2
Sample
2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exe
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Size
53KB
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MD5
68f9b80fa62126d747afb496d4d6e20b
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SHA1
b7c38ab7d1c2cc1adb81d80c244d0d5126a18d2e
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SHA256
493e847e11da2f138088b71f0f6e7be58a5f131c6aa6a7c688cd233d5e4d8cd5
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SHA512
5ba113599b5608aa13e489b3af39aaebad4f87619b1079f047ecb5055d06744a4e498ca831d226b1f520ad67ee3be3c62772113c5dca5ec9dbd0a251e3b7e402
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SSDEEP
768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOuq:bODOw9acifAoc+vo
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/776-0-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\lossy.exe CryptoLocker_rule2 behavioral2/memory/776-17-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4048-18-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4048-27-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/776-0-0x0000000008000000-0x000000000800F000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\lossy.exe UPX behavioral2/memory/776-17-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/4048-18-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/4048-27-0x0000000008000000-0x000000000800F000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation 2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
lossy.exepid process 4048 lossy.exe -
Processes:
resource yara_rule behavioral2/memory/776-0-0x0000000008000000-0x000000000800F000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\lossy.exe upx behavioral2/memory/776-17-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/4048-18-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/4048-27-0x0000000008000000-0x000000000800F000-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
Processes:
2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exedescription pid process target process PID 776 wrote to memory of 4048 776 2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exe lossy.exe PID 776 wrote to memory of 4048 776 2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exe lossy.exe PID 776 wrote to memory of 4048 776 2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exe lossy.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_68f9b80fa62126d747afb496d4d6e20b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:776 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:4048
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
53KB
MD542b86aff9b7d65e56d1171f88a7e2db8
SHA12aeebef86d6080f0296a3e342bf9f80b63907611
SHA2568c3ab61c7c6d6b07aebc82db53a138d14acd2a63ceb02ec2d655b6f328b17202
SHA512ea0e058c91ccf5e433cde8d92bd7bf4d028137924130013c351f3116ba6fc678097dcae7c1c2a8cd670150ee2ebdbeadea44ec66c824c32bcb45cee856674ba5