Analysis
- max time kernel
149s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
01/06/2026, 08:24
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-06-01_09933669f9a1281ffe4131548e75f7dc_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-06-01_09933669f9a1281ffe4131548e75f7dc_cryptolocker_elex.exe
Resource
win11-20260513-en
5 signatures
150 seconds
General
- Target 2026-06-01_09933669f9a1281ffe4131548e75f7dc_cryptolocker_elex.exe
- Size 62KB
- Sample260601-kax2fsft4w
- SHA256 8adf3bd96c8506b44b4c7eebec82c4f1468671b26414c05526c55cd322d50780
- MD5 09933669f9a1281ffe4131548e75f7dc
- SHA1 303dbd79e58a510f493c11e8ff2607f618735f4e
- SHA512 2871f093f3a29104290e072f4ba55720d20075273c3c5790845d5ddbea7f424bd75cdefdc1b5556de85318682c0497f550a7d17c38becb8e3755141584611db8
- SSDEEP 768:b7o/2n1TCraU6GD1oVzX0WcO+wMVm+slAMvcWsUavRwz8l7lLF6dIZbCGiwM:bc/y2ikF0+B2qK8PUMb+
- TLSH T13653123C7FD51A72E377C6B585F6A1C6FA39B8223D06980D50CB93840833F56ADA1A1D
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Custom signatureDetection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/2760-2-0x0000000000400000-0x0000000000408000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x002800000002b20c-13.dat CryptoLocker_rule2 behavioral2/memory/3376-19-0x0000000000400000-0x0000000000408000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 3376 rewok.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 rewok.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2026-06-01_09933669f9a1281ffe4131548e75f7dc_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 2760 wrote to memory of 3376 2760 2026-06-01_09933669f9a1281ffe4131548e75f7dc_cryptolocker_elex.exe 80
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-06-01_09933669f9a1281ffe4131548e75f7dc_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-06-01_09933669f9a1281ffe4131548e75f7dc_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2760 -
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:3376
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\rewok.exe
- Size 62KB
- SHA256 debbec6899f4e347ae7d4dc723b7b4e832a08801defc24a986597079491aa255
- MD5 c216eed714f0ccfafad3b6015a650002
- SHA1 ea855ce40e6a8fdaedf3e427854cdc19e5ca834a
- SHA512 d8a70023fcee9b6c148ac27ce9b54ac0c7bbdcf9d06419723c2d123f1e650ad6c91337df84610e4c5972fd2530d2f6c8a88da82a663d1ce7884465d7659fd030
- SSDEEP 768:b7o/2n1TCraU6GD1oVzX0WcO+wMVm+slAMvcWsUavRwz8l7lLF6dIZbCGiw0:bc/y2ikF0+B2qK8PUMbW
- TLSH T1CC53123C7FD51A72E377C6B585F691C6FA75B8223D02980D50CB93840833F56ADA1A1D
- MD5 SHA1 SHA512 SSDEEP TLSH