Analysis
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max time kernel
138s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
12/02/2024, 16:44
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-12_4019e19c85dc8ff31bafe3ad3b418ade_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_4019e19c85dc8ff31bafe3ad3b418ade_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_4019e19c85dc8ff31bafe3ad3b418ade_cryptolocker.exe
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Size
39KB
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MD5
4019e19c85dc8ff31bafe3ad3b418ade
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SHA1
107d218abf0bdb7e0edc750f8f9c9785b2d5936a
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SHA256
36b5591d768d76d1e81212e848e64004584a4f3d84bc8c3a5d524318034cb8bf
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SHA512
a335466e28b50570418bea116814d98e6fb0cdcf6371706183bd6724c4a9a1be28c8a4f44024441bd98d4073941b9382c5e7384e8dcc9a193a6d23f70f9a42ab
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SSDEEP
768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/fK:6j+1NMOtEvwDpjrRHK
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/548-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023121-13.dat CryptoLocker_rule2 behavioral2/memory/548-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4600-54-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/548-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0007000000023121-13.dat CryptoLocker_set1 behavioral2/memory/548-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/4600-54-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/548-0-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0007000000023121-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/548-19-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/4600-54-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 2024-02-12_4019e19c85dc8ff31bafe3ad3b418ade_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
pid Process 4600 misid.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 548 wrote to memory of 4600 548 2024-02-12_4019e19c85dc8ff31bafe3ad3b418ade_cryptolocker.exe 84 PID 548 wrote to memory of 4600 548 2024-02-12_4019e19c85dc8ff31bafe3ad3b418ade_cryptolocker.exe 84 PID 548 wrote to memory of 4600 548 2024-02-12_4019e19c85dc8ff31bafe3ad3b418ade_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_4019e19c85dc8ff31bafe3ad3b418ade_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_4019e19c85dc8ff31bafe3ad3b418ade_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:548 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:4600
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD5a577e8569a4c2ab524bb6700f899cfc8
SHA172bce9933a8a07eb4a163328a276856ebde892b4
SHA256b035616e3fff343ac25fe9568b8b41dbe1b901742c665646f9302c6046604d01
SHA51218f1c21acd3bed862f015640b5ae6de40621533ec0638c3af0a61731a61d54b5e2eff9dd450c8dde537fbf219c287ffa08c5a6a19648e4d861dbc23158a57d83