Analysis
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max time kernel
149s -
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
24-05-2024 04:26
Behavioral task
behavioral1
Sample
2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exe
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Size
85KB
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MD5
33827183c62dd87091601b11fec22881
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SHA1
02e83eabbc7852cfd1fa27a17fc164bfec3ce783
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SHA256
c6b7416a8426bbcb5745a0df34573acad2779b585adbb6fb3584bde0e00f1f56
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SHA512
1cc04e7cb20a67410269622779e1a4ab0164d3666a6a77ac3c52b0bab325943f42af2b42924e23697e1c00d048351b115efcfce63579bff19375d66557bb9cf9
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7vM5O:T6a+rdOOtEvwDpjNB
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/2508-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/3484-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2508-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3484-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral2/memory/2508-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/3484-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2508-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3484-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/2508-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/3484-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2508-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3484-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 3484 asih.exe -
Processes:
resource yara_rule behavioral2/memory/2508-0-0x0000000000500000-0x0000000000510000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/3484-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2508-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3484-27-0x0000000000500000-0x0000000000510000-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
Processes:
2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exedescription pid process target process PID 2508 wrote to memory of 3484 2508 2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exe asih.exe PID 2508 wrote to memory of 3484 2508 2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exe asih.exe PID 2508 wrote to memory of 3484 2508 2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_33827183c62dd87091601b11fec22881_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
85KB
MD507d6b984857fd9de18aec618b6a3cce6
SHA1e67eee1d0811f1d928b3c9c909a4fbf0267f182d
SHA256570664f343418c472a46f85f2ddb9d3c61e9268d9019ad31380bef5c6ef62fb2
SHA512a1cb62cd235a4835d4c582880e19dfee592efd0d73c00465e8af7d4d32772b6167b8a73538622f355d1f5d314fac267b142edaebb778de6625d5c1a407e236fa
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memory/2508-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2508-1-0x0000000000660000-0x0000000000666000-memory.dmpFilesize
24KB
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memory/2508-2-0x00000000007D0000-0x00000000007D6000-memory.dmpFilesize
24KB
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memory/2508-9-0x0000000000660000-0x0000000000666000-memory.dmpFilesize
24KB
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memory/2508-18-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/3484-17-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/3484-20-0x0000000002000000-0x0000000002006000-memory.dmpFilesize
24KB
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memory/3484-26-0x00000000004E0000-0x00000000004E6000-memory.dmpFilesize
24KB
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memory/3484-27-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB