Analysis
- max time kernel
150s - max time network
149s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
12/10/2026, 15:57
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-10-11_91f27f23a474b9d5519e20ef2f628c0e_cryptolocker_elex.exe
Resource
win10v2004-20260911-en
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-10-11_91f27f23a474b9d5519e20ef2f628c0e_cryptolocker_elex.exe
Resource
win11ltsc2024-20260911-en
6 signatures
150 seconds
General
- Target 2026-10-11_91f27f23a474b9d5519e20ef2f628c0e_cryptolocker_elex.exe
- Size 39KB
- Sample261012-tecqratx3k
- SHA256 720d39f6ce947112bc8264de189f4821c66ede14dc6db0a66180804fbc9dae77
- MD5 91f27f23a474b9d5519e20ef2f628c0e
- SHA1 6e86c2e68d59ef860d1aca51076b93702bf27607
- SHA512 87583356f9af1734dc468dc8070ca0c1dc6550fddc1965f3c4fd7827ee1bf73c7945dc9e01b61553df28529eabeb7c9f1fd05f6d966306afcafa6b4c52ba6fa2
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXCQ:bgGYcA/53GAGgIvFd
- TLSH T1D20386387FD62972D37BDFB586F691C6B935B8223D16880D54CA53844C33B62EC91A0E
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4656-2-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000b00000001b2cb-12.dat CryptoLocker_rule2 behavioral2/memory/4920-18-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4920-26-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 4920 hasfj.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname hasfj.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain hasfj.exe - 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 2026-10-11_91f27f23a474b9d5519e20ef2f628c0e_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 4656 wrote to memory of 4920 4656 2026-10-11_91f27f23a474b9d5519e20ef2f628c0e_cryptolocker_elex.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-10-11_91f27f23a474b9d5519e20ef2f628c0e_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-10-11_91f27f23a474b9d5519e20ef2f628c0e_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4656 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
PID:4920
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 39KB
- SHA256 b62a4500b2e4f72fe47755e32d83e818657c7bac3a26894bdcd9f3cf4d88b6d9
- MD5 dd260fb926193fe9b006246fcef8ca53
- SHA1 d77948f02b6cc61113da927fedb21ea50a7d8565
- SHA512 8afe1e109220af9b4eb60e11d400cccebc559f26e1962ff8b0ecd13f71752da98c329961293df1e233b01836c0b3458f06fa1840a93b123cbe435e54f103c3e0
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXCu9:bgGYcA/53GAGgIvF59
- TLSH T1970386387FE62972D37BDFB586F691C6B935B8223D15880D54CA53844C33B62EC91A0E
- MD5 SHA1 SHA512 SSDEEP TLSH