Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
06/10/2024, 05:28
Behavioral task
behavioral1
Sample
2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe
Resource
win7-20240704-en
General
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Target
2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe
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Size
34KB
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MD5
758647073a3eecb3f7c3ba77785c71aa
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SHA1
ce0482cce4760b27a75acb6848e0c81ec626a97b
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SHA256
83302b98de2e7dde08f20256341ddda960cf50008a76c91dca1f9e919b279e3b
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SHA512
62bc4ec61b2ddf9d7fd0c88de1134b902450fcfc2d6a59b16fa47d09d39889cf578a98c728a8254d970ddc5acbed4b72ab2ad2cee7e5ba3f2d6a55f5e4e436a4
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SSDEEP
768:bROjawZEjbhxnbcuyD7U9kXfn62tH/1/LpP+e3:bRO2wZEjbnouy8Gv6iH/NLpB
Malware Config
Signatures
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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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation 2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4452 rewok.exe -
resource yara_rule behavioral2/memory/3612-0-0x0000000000400000-0x000000000040D000-memory.dmp upx behavioral2/files/0x00090000000233d9-13.dat upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rewok.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3612 wrote to memory of 4452 3612 2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe 82 PID 3612 wrote to memory of 4452 3612 2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe 82 PID 3612 wrote to memory of 4452 3612 2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3612 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4452
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
34KB
MD5f3827201ae7f5b92025627e080ed9d7c
SHA1d21d632ce01120082e8fe48e207c8d62abe1bf38
SHA2562b4f8f90e5ac2761de238485f08075b3ed9fd095732a8c572d8b99e13db4b52f
SHA512d95b75e457a0821a9a23ca690256af7621ee016e0a3fdb8af64c665c203b2fef5e85bbf22d7ba09c7f3ae75bd1e689881478561a47d0dce6a97a04c45acc12ab