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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
19/02/2024, 05:21
Behavioral task
behavioral1
Sample
2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe
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Size
114KB
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MD5
ed31749da19614babd662e6e91eb713f
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SHA1
b126c3d45c8dd3dca47189246bef6cdae1d82b35
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SHA256
35bb92a252f5572800db00e8182e5b2c7e241fb3b8e6233f4d3084ea42ecb117
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SHA512
1d6c263bc171f543f0810505e8215b3c4a027bc75a65acedd42818dd7d1dc7e91f2c17f16aec2580a40e8003b3bda0f870740444369f989d1e642c951c8b4297
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01M:z6a+CdOOtEvwDpjcza
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x001000000002315e-13.dat CryptoLocker_rule2 behavioral2/memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3468-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x001000000002315e-13.dat CryptoLocker_set1 behavioral2/memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3468-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x001000000002315e-13.dat UPX behavioral2/memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3468-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation 2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3468 asih.exe -
resource yara_rule behavioral2/memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x001000000002315e-13.dat upx behavioral2/memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3468-26-0x0000000000500000-0x0000000000510000-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 3252 wrote to memory of 3468 3252 2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe 85 PID 3252 wrote to memory of 3468 3252 2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe 85 PID 3252 wrote to memory of 3468 3252 2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3252 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3468
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
115KB
MD5a55d6bb0cab213982d7ea8e67a022944
SHA12162e6a6bf09e603a450e4fdd9d09681a9b6ecb2
SHA2568054681f596e7ed18a3044a3fcdb33bb052fe75b60eeec46bdb4b78e9d21a422
SHA5126cb40febe205a472c753fbc873c5e2693090b705805bf430a11639c4960a91526a45250a730ef713588f936775cbbb2c20eb6a83d1c19dee8b3ef4e8ddefc5e4