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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
29/03/2024, 00:46
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-29_c8392fd7f9747048b775e029fc651255_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-29_c8392fd7f9747048b775e029fc651255_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-29_c8392fd7f9747048b775e029fc651255_cryptolocker.exe
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Size
45KB
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MD5
c8392fd7f9747048b775e029fc651255
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SHA1
e3181adab7fa58f9b7878b5545585948db6bad88
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SHA256
249263186d9132ef1708aff564ec7d28ca17aad099555f12a8b427e2265381dd
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SHA512
6bda3a5d28795ca60778fa53900fef5b65e53228bbab76943a76631bd4ad786b7068523fc792603b741002205f6f81d1ff9dd9b45499217cc877b97e128f2058
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SSDEEP
768:79inqyNR/QtOOtEvwDpjBKccJVODvyLUVmV4:79mqyNhQMOtEvwDpjBzckp3
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/1444-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000224f7-13.dat CryptoLocker_rule2 behavioral2/memory/1444-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/1444-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00090000000224f7-13.dat CryptoLocker_set1 behavioral2/memory/1444-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation 2024-03-29_c8392fd7f9747048b775e029fc651255_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2084 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
description pid Process procid_target PID 1444 wrote to memory of 2084 1444 2024-03-29_c8392fd7f9747048b775e029fc651255_cryptolocker.exe 88 PID 1444 wrote to memory of 2084 1444 2024-03-29_c8392fd7f9747048b775e029fc651255_cryptolocker.exe 88 PID 1444 wrote to memory of 2084 1444 2024-03-29_c8392fd7f9747048b775e029fc651255_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-29_c8392fd7f9747048b775e029fc651255_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-29_c8392fd7f9747048b775e029fc651255_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1444 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2084
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
45KB
MD55cefdae41641d115c403eb210f319b3b
SHA138baf0806c2529ac1febe4478d2069e68d79e9c1
SHA2567fc703e6cf76c7719db902a6e751ddff51d38800d211c44c0cb425a59321aa7c
SHA512e5b04cac045f0a9aa78f771a7b7f2d08f46d3c75a24d494e967c39a80f0fe46032867d9caf3a2e460cc7ae1e76de3e0fa4a1e5079f653c084619ac70085f66a3