Analysis
- max time kernel
150s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
20/08/2026, 18:47
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-08-20_d258b65f56b1830fe6992ff56347d3cb_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-20_d258b65f56b1830fe6992ff56347d3cb_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-08-20_d258b65f56b1830fe6992ff56347d3cb_cryptolocker_elex.exe
- Size 64KB
- Sample260820-xfkdrstdjh
- SHA256 1e74e27977ebe5639cbf410cc4175b3edb9d3232060c2619b740528d2dac205b
- MD5 d258b65f56b1830fe6992ff56347d3cb
- SHA1 13b29f481bbef2b054865c197e8522714ab401cd
- SHA512 73a50db760c19c6e9826f5052792be257b56f5873ac7ad5d16d70d4dc4b0d1e9a276044608037ba8feb18eeef3ea2359c56ad1324e6b002617a4336ef7ff1321
- SSDEEP 768:bG74zYcgT/Ekd0ryfjSb8qD+7g3Zectbr5+IunYw16zlA:bG6YcA/X6Gw8qDxRWP6JA
- TLSH T12A53F83D7BC61A72D3778AB195F791C3BA36B4323A15884D44CE53480933F62EDA2A4D
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral1/memory/3280-2-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000800000002453d-13.dat CryptoLocker_rule2 behavioral1/memory/3424-17-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3424-25-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 - Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation 2026-08-20_d258b65f56b1830fe6992ff56347d3cb_cryptolocker_elex.exe - Executes dropped EXE 1 IoCs
pid Process 3424 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_d258b65f56b1830fe6992ff56347d3cb_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 3280 wrote to memory of 3424 3280 2026-08-20_d258b65f56b1830fe6992ff56347d3cb_cryptolocker_elex.exe 87
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-20_d258b65f56b1830fe6992ff56347d3cb_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-20_d258b65f56b1830fe6992ff56347d3cb_cryptolocker_elex.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3280 -
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:3424
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 64KB
- SHA256 1d6ae7f843f1e2ac4defa424bb2a0bed52921e82830a91cc017d735646230c96
- MD5 71c092583058f2815771b89847fffb6e
- SHA1 a864c289a425618d55ce7651886a295676ae5610
- SHA512 eeea49b5774cf1bd0a7f40bcdda7f8eab4f7a9620f9965aa9a892fcbd9adaee67ced06d9a95e0b468ca7022053d1ebdfc8b6f232e4cf50abfa3f194546d5a1a8
- SSDEEP 768:bG74zYcgT/Ekd0ryfjSb8qD+7g3Zectbr5+IunYw16zlV:bG6YcA/X6Gw8qDxRWP6JV
- TLSH T11353F83D7BC61A72D3778AB196F791C3BA35B4323A15884D44CE53480933F62EDA2A4D
- MD5 SHA1 SHA512 SSDEEP TLSH