Analysis
- max time kernel
150s - max time network
146s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
31/05/2026, 08:31
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-05-31_3d386b1e9f52a11926004a9a18443d1b_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-05-31_3d386b1e9f52a11926004a9a18443d1b_cryptolocker_elex.exe
Resource
win11-20260513-en
5 signatures
150 seconds
General
- Target 2026-05-31_3d386b1e9f52a11926004a9a18443d1b_cryptolocker_elex.exe
- Size 38KB
- Sample260531-keregae13p
- SHA256 b9416cf1e5a19223a2aa7fa0b7c477fd604d66f29fac8ddb52686e68148d29ea
- MD5 3d386b1e9f52a11926004a9a18443d1b
- SHA1 9eb7287e823bbb05e5e339cce0cdecb9a62c5775
- SHA512 345bbc06527b909f39a01e1df730ca4f5ee97525a40ac9da0745eb7613e9984808d77451156b3da9cf043cf46413872faaf0dbc13f870a788c5dd8bdae7d6996
- SSDEEP 768:bg74zYcgT/Ekd0ryfjpRVz/mwTYAYf1tA:bg6YcA/X6Gtbz/YA3
- TLSH T1DD0374386BE62972E37BDE7596F791C2B939B8223D15880D54CB53844C33F52EC91A0E
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2528-0-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2528-3-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x001d00000002b1c0-14.dat CryptoLocker_rule2 behavioral2/memory/4784-18-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4784-26-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 4784 hasfj.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 2026-05-31_3d386b1e9f52a11926004a9a18443d1b_cryptolocker_elex.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language hasfj.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 2528 wrote to memory of 4784 2528 2026-05-31_3d386b1e9f52a11926004a9a18443d1b_cryptolocker_elex.exe 80
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-05-31_3d386b1e9f52a11926004a9a18443d1b_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-05-31_3d386b1e9f52a11926004a9a18443d1b_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2528 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4784
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 38KB
- SHA256 31948fa2de54f880c4859cd63dc9a2085d010841aa2745eb507fdeaa6fcec8d4
- MD5 06ea93c48c89e62a1cb43b0d947e2407
- SHA1 481fd1e79728d89413a12295438f55a295697386
- SHA512 8fd323f110d68cb585cd577d7301129b76df0a1348b52ca8eb1204374623782041de5e67b78d15a06bcb64d034e0401b69a12015ea911aad2a85504c7cb62ae9
- SSDEEP 768:bg74zYcgT/Ekd0ryfjpRVz/mwTYAYf1tl:bg6YcA/X6Gtbz/YAG
- TLSH T1440374386BE62972E37BDE7596F791C2B939B8223D15880D54CB53844C33F52EC91A0E
- MD5 SHA1 SHA512 SSDEEP TLSH