Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240220-en -
resource tags
arch:x64arch:x86image:win10v2004-20240220-enlocale:en-usos:windows10-2004-x64system -
submitted
20-02-2024 12:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe
Resource
win10v2004-20240220-en
General
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Target
2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe
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Size
53KB
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MD5
3a35ca6204e6d8cfe6c9e62b78aafd65
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SHA1
eafc5b2e8625c69a5b43798da4fad0eff7e95571
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SHA256
f6cab8bf30f9870fbf8b1a9a83ac4ed84839cd445d682a9151664f3e83a0f97b
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SHA512
52c81623a2ab7119c725a9674e8864d081816db38913522fdeb2898988bf6f2df8ca02231cdaef7df01bb7cf92fb8c9e0763ce360ff16abbf93130740d174b7e
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SSDEEP
768:79inqyNR/QtOOtEvwDpjBK/iVTab3GRuv3VylSV/CCjgA:79mqyNhQMOtEvwDpjBPY7xv3g8OA
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/2484-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c00000002312c-13.dat CryptoLocker_rule2 behavioral2/memory/2484-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5052-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/2484-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000c00000002312c-13.dat CryptoLocker_set1 behavioral2/memory/2484-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/5052-18-0x0000000000500000-0x000000000050F000-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-1-5-21-1888637039-960448630-940472005-1000\Control Panel\International\Geo\Nation 2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5052 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 2484 wrote to memory of 5052 2484 2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe 85 PID 2484 wrote to memory of 5052 2484 2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe 85 PID 2484 wrote to memory of 5052 2484 2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2484 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:5052
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
53KB
MD5c766763d71d5e1e9cbccfcae2aea6595
SHA1c44ff82f0fe391d2a3ab70e8af72ee8923f6556a
SHA2569b9b1cdd6d235a9475ad7608241a1cf31f40b43227daa872f7214ce463b1bd96
SHA5129e21b6f21b59dbb46f80c95cdfff0f73ef4de6a85bc65bbaf12d7db855db45109361f8fc803a363da38ba748fca5057593c2826fdc8f55633417065663ac9d3c