Analysis
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max time kernel
152s -
max time network
158s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
07/03/2024, 00:42
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe
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Size
46KB
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MD5
10e58ceaa9a5e5b63ff3c93a7be9ce97
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SHA1
e4b3ea3eefb6e54f9b7a4fb875eb1331f992c7c6
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SHA256
2bfee29753786dae21870005912f24cdf8f2d221bc58cfb6b49e6649a7603d0a
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SHA512
713267abd4146bc121d08d4b090f6d27daacdb357ec5efd86c170a69ae722c1a45d6806845a6b1b7b4e8e0cb35e0f5c8ea1884ef794b3bc5591b16d6dad7a36b
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SSDEEP
768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MobeU:qmbhXDmjr5MOtEvwDpj5cDtKkQZQt
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1552-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022745-13.dat CryptoLocker_rule2 behavioral2/memory/1552-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1264-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/1552-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1264-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/1552-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000022745-13.dat UPX behavioral2/memory/1552-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1264-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation 2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1264 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 1552 wrote to memory of 1264 1552 2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe 91 PID 1552 wrote to memory of 1264 1552 2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe 91 PID 1552 wrote to memory of 1264 1552 2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1552 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1264
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
47KB
MD50f51b7f0d182550ba681aefd57cd56d3
SHA17b59922c2fe22bbe705a5d1aba6273fd09522a69
SHA256e2325f9dd9adcaa4af4d6623e366ec3045418ed760b73ad8efcb9f1545f4ddc6
SHA5124454d0597b7c84685d7667d58b35386e620655aec006729cfaf110e497a6bcb425f91fa8fdd1695aff74d0badfd001e1dc02580835d18d00ef111510dcd04ac9