Analysis
- max time kernel
149s - max time network
152s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
15/04/2026, 08:08
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-04-15_d561706bb4a9717fbb7b9ef1d0d5f5df_cryptolocker_elex.exe
Resource
win10v2004-20260130-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-04-15_d561706bb4a9717fbb7b9ef1d0d5f5df_cryptolocker_elex.exe
Resource
win11-20260130-en
5 signatures
150 seconds
General
- Target 2026-04-15_d561706bb4a9717fbb7b9ef1d0d5f5df_cryptolocker_elex.exe
- Size 57KB
- Sample260415-j111csct9x
- SHA256 fc272026fed16cadf3f0f0d4477314031424fda86edb46069db3c224aa925e84
- MD5 d561706bb4a9717fbb7b9ef1d0d5f5df
- SHA1 56a5375b9cfcd48b6af3368521b263c5e8dd10de
- SHA512 f7976cf2dedd6f95a6c8ad1a34a457e9bcb56dae3583047d3e00b4c0e606cbf336dbe8c6783d1811f33c586d64bc77c5866a3f802d2ffc5e6d65f6b4c5b524cf
- SSDEEP 768:b3o/2n1TCraU6GD1gdcKX4WcO+wMVm+slAMphNuhX3HdAxmlkMl1fEPtw3g:b4/y2M1oF0+BeghXuMUH
- TLSH T10443843DBFD51672D37786B585F7A0C6FA3AB82239069C0D50CB53880933F5AADA160D
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 2 IoCs
resource yara_rule behavioral2/files/0x001e00000002b0b8-13.dat CryptoLocker_rule2 behavioral2/memory/1856-19-0x0000000000400000-0x000000000040C000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 1856 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 2026-04-15_d561706bb4a9717fbb7b9ef1d0d5f5df_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 3432 wrote to memory of 1856 3432 2026-04-15_d561706bb4a9717fbb7b9ef1d0d5f5df_cryptolocker_elex.exe 80
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-04-15_d561706bb4a9717fbb7b9ef1d0d5f5df_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-04-15_d561706bb4a9717fbb7b9ef1d0d5f5df_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3432 -
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:1856
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\rewok.exe
- Size 57KB
- SHA256 cc8aa51c956a74699d451018a7aa3d382afa0f9cc4830360d359d1cc9424ad22
- MD5 3de85898e561fbd561e16d5a1dd52754
- SHA1 977602d823fa23ea2bad24fbaed7c82db78ce1bd
- SHA512 2608f609c1699ca27ac5bce6a36265004f178a4db35fe2538cc7a4ff5e731aa24d2f08054129217a95efee530913f59827e83d23e50f1386e3e7368e7faf9d76
- SSDEEP 768:b3o/2n1TCraU6GD1gdcKX4WcO+wMVm+slAMphNuhX3HdAxmlkMl1fEPtw3C:b4/y2M1oF0+BeghXuMUZ
- TLSH T17D43743DBFD51672D37786B585F7A0C6FA3AB82239069C0D50CB53880933F5AADA160D
- MD5 SHA1 SHA512 SSDEEP TLSH