Analysis
- max time kernel
150s - max time network
146s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
05/08/2026, 06:41
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-08-05_f45174d797485c5146f3a9be73592ea0_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-05_f45174d797485c5146f3a9be73592ea0_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-08-05_f45174d797485c5146f3a9be73592ea0_cryptolocker_elex.exe
- Size 57KB
- Sample260805-hf1nesfa82
- SHA256 49efb4934939910c0aa53d7bf2cddbed23c38b65c1ec5f6db90f7ec319cc9d91
- MD5 f45174d797485c5146f3a9be73592ea0
- SHA1 6f8a647cdc6e23bad284a4a1497d9d2dec1c46e7
- SHA512 a294c2d71a2067eaed6849825252374cdc3479cbcb8ee0dc58639e7a4593bdbe1f2ecf24b93e27916783fafdada480b6dc6edd1b6562ffa186815bee6d4eae99
- SSDEEP 768:b3o/2n1TCraU6GD1gdcKX4WcO+wMVm+slAMphNuhX3HdAxmlkMl1fEPtw3Q:b4/y2M1oF0+BeghXuMUH
- TLSH T1C543843DBFD51672D37786B585F7A0C6FA3AB82239069C0D50CB53880933F56ADA160D
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/4580-2-0x0000000000400000-0x000000000040C000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000001b85f-13.dat CryptoLocker_rule2 behavioral2/memory/4304-20-0x0000000000400000-0x000000000040C000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 4304 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 2026-08-05_f45174d797485c5146f3a9be73592ea0_cryptolocker_elex.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rewok.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 4580 wrote to memory of 4304 4580 2026-08-05_f45174d797485c5146f3a9be73592ea0_cryptolocker_elex.exe 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-05_f45174d797485c5146f3a9be73592ea0_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-05_f45174d797485c5146f3a9be73592ea0_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4580 -
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:4304
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\rewok.exe
- Size 58KB
- SHA256 29795443f685e2d2e882dfd8d0576376f33eb32849d76cf50aa667f8354c4780
- MD5 3311faa54c24fbef604a80a0a7a48ffc
- SHA1 c1d9e5023781036601fe2339fff562e54d51134f
- SHA512 47785316161f031b8153ef0be3c0a4ed7b6a70454d97eb20d074998b9221c01a028c0225136afad8f4b168584e2e032f301ca6e3e17f1817369939b288e38cb7
- SSDEEP 768:b3o/2n1TCraU6GD1gdcKX4WcO+wMVm+slAMphNuhX3HdAxmlkMl1fEPtw3f:b4/y2M1oF0+BeghXuMUw
- TLSH T15643753DBFD51672D37786B585F7A0C6FA3AB82239069C0D50CB53880933F5AADA160D
- MD5 SHA1 SHA512 SSDEEP TLSH