Analysis
- max time kernel
150s - max time network
148s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
20/08/2026, 11:41
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-08-20_a4028e493d3a58934eadeac493eb9603_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-20_a4028e493d3a58934eadeac493eb9603_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-08-20_a4028e493d3a58934eadeac493eb9603_cryptolocker_elex.exe
- Size 36KB
- Sample260820-ntv8rawcng
- SHA256 997de6f62efceee7dcd108ccac2676e88b00c409bb676e650d354133106120a4
- MD5 a4028e493d3a58934eadeac493eb9603
- SHA1 895c4691c4d3de58316dc96f0d85750e86f7623c
- SHA512 526afcd2094b0b05d481ab07d46521581c5a6e23c0f6eb8000ae69f2b7c0ffd4bf938e5c678cde081f3ba40696142303491aeebb44d21fb1d775ac8aa040ac27
- SSDEEP 384:bA74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUuDzaNYqAy/YjyAFkt5ChX0c:bA74zYcgT/Ekd0ryfjLzViYuAKc
- TLSH T121F295386BD62972D3BBCEB595F751C2B935B8233E158C0E54CB23884D32B62EC5261D
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4644-2-0x0000000008000000-0x0000000008009000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000001b884-13.dat CryptoLocker_rule2 behavioral2/memory/940-18-0x0000000008000000-0x0000000008009000-memory.dmp CryptoLocker_rule2 behavioral2/memory/940-26-0x0000000008000000-0x0000000008009000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 940 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 2026-08-20_a4028e493d3a58934eadeac493eb9603_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 4644 wrote to memory of 940 4644 2026-08-20_a4028e493d3a58934eadeac493eb9603_cryptolocker_elex.exe 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-20_a4028e493d3a58934eadeac493eb9603_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-20_a4028e493d3a58934eadeac493eb9603_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4644 -
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:940
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 36KB
- SHA256 429ebd66e69df116012e5c510444631d904a846a3af3541ed5179a5f4e5ccbb2
- MD5 efe1a0c3179053fa35046bee56f1acaa
- SHA1 0542091fdfc76d63ec6591f78715b681abbc5281
- SHA512 9665ad8c9221859718c6e560c3bee71720cdb11aadf3b1d042f7f7651bfc875ce4815ce1295c16ca25fc8bdcc79b805db7b9c7b6b34541634ba2641afc1da6f9
- SSDEEP 384:bA74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUuDzaNYqAy/YjyAFkt5ChX0X:bA74zYcgT/Ekd0ryfjLzViYuAKX
- TLSH T19EF295386BD62972D3BBDEB595F750C2B935B8233E158C0E54CB23884C32B62EC5261D
- MD5 SHA1 SHA512 SSDEEP TLSH