Analysis
- max time kernel
150s - max time network
159s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
18/08/2026, 12:50
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-08-18_b405fcaf717e20b25b93b974359c9dad_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-18_b405fcaf717e20b25b93b974359c9dad_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-08-18_b405fcaf717e20b25b93b974359c9dad_cryptolocker_elex.exe
- Size 33KB
- Sample260818-p2yvaabm2x
- SHA256 24d34ab833861562f400f49f62321e99b82b57078fc803d53ec1e205f1973493
- MD5 b405fcaf717e20b25b93b974359c9dad
- SHA1 3765d4e49fda5e40c63fc7f7e230c2bcf9d86c4b
- SHA512 9c0c5de54d5e977e33b2a69cf69ec26764a9164ea0c9bd8a3b1b7d4580c50aaf118c7526d28a171f03c616c82cc05766f3f8e21a11e608ad176c80d663bb17a7
- SSDEEP 384:+0V/YPvnr801TRoUGPh4TKt6ATt1DqgParI/zzoXYK7AkflxSb+:+o/2n1TCraU6GD1aIX0h9y+
- TLSH T106F2B5357BF95D61E3778A7015F3F181BA7E7C103D06991EA68BF3880537A05A860F1A
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 2 IoCs
resource yara_rule behavioral2/files/0x000e00000001c492-13.dat CryptoLocker_rule2 behavioral2/memory/4056-20-0x0000000000400000-0x0000000000408000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 4056 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 2026-08-18_b405fcaf717e20b25b93b974359c9dad_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 3600 wrote to memory of 4056 3600 2026-08-18_b405fcaf717e20b25b93b974359c9dad_cryptolocker_elex.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-18_b405fcaf717e20b25b93b974359c9dad_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-18_b405fcaf717e20b25b93b974359c9dad_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3600 -
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:4056
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Temp\rewok.exe
- Size 33KB
- SHA256 d7d5bc7f61472312450780aac16ea2dd4264c5cdca7ae710538ce08067991750
- MD5 25a5a3cc3ab7b590c5b1352f26997267
- SHA1 b98548534d7ca3391d75ac2beb7257710b8ac1dd
- SHA512 ffcdce54bf0f1f8aea604387c8f0935d5d47565c80adf6da6be6ca2d0407ea63789c13c0520a947769432145f6ba5c6d11c8bc9ef9beac2694e70237e93b089d
- SSDEEP 384:+0V/YPvnr801TRoUGPh4TKt6ATt1DqgParI/zzoXYK7AkflxSbv:+o/2n1TCraU6GD1aIX0h9yv
- TLSH T1ABF2B5357BF95D61E3778A7015F3F181BA7E7C103D06991E668BF3880837A09A860F1A
- MD5 SHA1 SHA512 SSDEEP TLSH