Analysis
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max time kernel
148s -
max time network
151s -
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, 20:34
Behavioral task
behavioral1
Sample
2024-06-06_be978a55287044b8de34e04fc66f8f5d_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-06_be978a55287044b8de34e04fc66f8f5d_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-06_be978a55287044b8de34e04fc66f8f5d_cryptolocker.exe
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Size
40KB
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MD5
be978a55287044b8de34e04fc66f8f5d
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SHA1
67e2e6cbfaf38ff0d1f3d8d40d9dbd7209a71a22
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SHA256
98fb975e0ac3a09b7ac20748637ea02229f57fb382afb79546bbfc73d433bd5d
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SHA512
a2ba35fa7fb9b1cf892ecf5e45873a7c0f80c7ed4f8ae69519bacbd8ca476eed9fca8a2b5fa4c978a14ce24ffab6a5b7b7b1af89a264ed2eaf7186af6c3bb54f
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYX54I:qDdFJy3QMOtEvwDpjjWMl7TC
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3908-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0005000000022975-13.dat CryptoLocker_rule2 behavioral2/memory/3908-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4472-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4472-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3908-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0005000000022975-13.dat CryptoLocker_set1 behavioral2/memory/3908-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4472-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4472-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3908-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0005000000022975-13.dat UPX behavioral2/memory/3908-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4472-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4472-28-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation 2024-06-06_be978a55287044b8de34e04fc66f8f5d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4472 asih.exe -
resource yara_rule behavioral2/memory/3908-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0005000000022975-13.dat upx behavioral2/memory/3908-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4472-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4472-28-0x0000000000500000-0x0000000000510000-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 3908 wrote to memory of 4472 3908 2024-06-06_be978a55287044b8de34e04fc66f8f5d_cryptolocker.exe 92 PID 3908 wrote to memory of 4472 3908 2024-06-06_be978a55287044b8de34e04fc66f8f5d_cryptolocker.exe 92 PID 3908 wrote to memory of 4472 3908 2024-06-06_be978a55287044b8de34e04fc66f8f5d_cryptolocker.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-06_be978a55287044b8de34e04fc66f8f5d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-06_be978a55287044b8de34e04fc66f8f5d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3908 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4472
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3852,i,1067197275908310731,12785105794523264014,262144 --variations-seed-version --mojo-platform-channel-handle=4236 /prefetch:81⤵PID:3152
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD54a5281e441edff7b7e1f88ab52e7d950
SHA196b0d22e96c6ece3f67f9f0278d66c70862b672a
SHA256fc0345414b7a5f7a01f104d665af421aea02665649a2b802b94d2c1fddcb18ce
SHA51253876dddc0d2e91f0c3fb706e25bc2a30599236b2b14d395158d6af4197e58811c632dbcc67d2dd881542b845e87dc0c823831c83e22de512a2ef411f59afe9f