Analysis
- max time kernel
150s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
05/09/2026, 01:23
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-09-04_a4924839c67bd0eebddb0765073ffcc9_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-09-04_a4924839c67bd0eebddb0765073ffcc9_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-09-04_a4924839c67bd0eebddb0765073ffcc9_cryptolocker_elex.exe
- Size 35KB
- Sample260905-br74batgrd
- SHA256 4be336a4a8517e23f94e03c13f6ef03ee3159ef7016165e9b2dc3e3b2f5d0889
- MD5 a4924839c67bd0eebddb0765073ffcc9
- SHA1 86369f6e5e069b79aa08b6d6a10df7e3a1a8a7cd
- SHA512 5e143d6aadfb741c408fbcdbc02bca05e4ebba967f7a4dbb3c2877a3b98f404e39784c3d2a55399dd721144d2676002c57ccbaa63b2205527dd264f271f5d386
- SSDEEP 384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTGXuaBflN3st:bG74zYcgT/Ekd0ryfjWlN3st
- TLSH T17BF2E635F7EA3C22DE36AEF491F640F1A73F7819791478DE08ABE34D88B2611995D009
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3620-0-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3620-3-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000500000001b851-14.dat CryptoLocker_rule2 behavioral2/memory/5676-19-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5676-21-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 5676 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 hasfj.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2026-09-04_a4924839c67bd0eebddb0765073ffcc9_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 3620 wrote to memory of 5676 3620 2026-09-04_a4924839c67bd0eebddb0765073ffcc9_cryptolocker_elex.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-09-04_a4924839c67bd0eebddb0765073ffcc9_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-09-04_a4924839c67bd0eebddb0765073ffcc9_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3620 -
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:5676
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 35KB
- SHA256 cb58d7bf096ee635921909c2573176aa5ee8c0e9f97f78424019fa8ca17b186f
- MD5 ea3e7a33580a48b6b4b8867f5a800181
- SHA1 e26062fd40f95772761358e9486c8484a6696e3a
- SHA512 8dad517f7df6dcaa6c9406199d1e2f236a34cc89908f012e1abddc92e33064c0790ab4b7317a2c74c9625414bd29d05e35b79a7c69267e9f4b1ce268c9562a46
- SSDEEP 384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTGXuaBflN3sS8:bG74zYcgT/Ekd0ryfjWlN3sF
- TLSH T1A1F2E635F7EA3822DE36AEF491F640F1AB3F7819791478DE08ABE34D8872611995D009
- MD5 SHA1 SHA512 SSDEEP TLSH