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
23/05/2026, 10:32
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-05-23_b42f7107b5d3e9cac92fb1bb4e6cbe4f_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-05-23_b42f7107b5d3e9cac92fb1bb4e6cbe4f_cryptolocker_elex.exe
Resource
win11-20260513-en
5 signatures
150 seconds
General
- Target 2026-05-23_b42f7107b5d3e9cac92fb1bb4e6cbe4f_cryptolocker_elex.exe
- Size 46KB
- Sample260523-mlafmsax9x
- SHA256 01c0fa555ef7e98f808d9ced479a365788db5ee7493135f108f5612e5b824cf3
- MD5 b42f7107b5d3e9cac92fb1bb4e6cbe4f
- SHA1 b58e65fe7a209fa4d9b832871bbd0ae93c403a1f
- SHA512 b595e00b41c28d377a0286a411f5f00356ba15c7776b219331b075e7d384a098997aaef526f3f660a11d166ff22bf1a8701ec14dd8d8f521f66c0cd17a202b20
- SSDEEP 768:bFo/2n1TCraU6GD1aIXcn62tH/1/LpP+leCD:bC/y2Zm6iH/NLptCD
- TLSH T1DA231F3CBFE41972D37BC67585F2A1C6B97678123D029C0E55CBA3880833F5AAD91A1D
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 2 IoCs
resource yara_rule behavioral2/files/0x000a00000000d3c3-13.dat CryptoLocker_rule2 behavioral2/memory/656-19-0x0000000000400000-0x0000000000408000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 656 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 2026-05-23_b42f7107b5d3e9cac92fb1bb4e6cbe4f_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 428 wrote to memory of 656 428 2026-05-23_b42f7107b5d3e9cac92fb1bb4e6cbe4f_cryptolocker_elex.exe 79
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-05-23_b42f7107b5d3e9cac92fb1bb4e6cbe4f_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-05-23_b42f7107b5d3e9cac92fb1bb4e6cbe4f_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:428 -
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:656
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\rewok.exe
- Size 46KB
- SHA256 9922436ff8bff7aa325a8ac753cae5ef571ef565b80bf3e74cd25daff31e061b
- MD5 14786f61ffba41dd507b32137a531b8e
- SHA1 045b55158ddbdda35c02f5d32dedb55d73fe01c7
- SHA512 b0c5037aca3ab74ee32028261835d5e084620e3d9c809b03d7d9a66c78d20158fe5e6ed0f85bcdd04be6b412ee8ebac8beba7e72e6bd7fb422749b1b2eba186b
- SSDEEP 768:bFo/2n1TCraU6GD1aIXcn62tH/1/LpP+leCU:bC/y2Zm6iH/NLptCU
- TLSH T1A8231F3CBFE41972D37BC67595F2A1C6B97678123D029C0E51CBA3880833F5AAD91A1D
- MD5 SHA1 SHA512 SSDEEP TLSH