Analysis
- max time kernel
150s - max time network
150s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
17/10/2026, 18:23
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-10-16_4893a79f8afbc328c380ea00b5dbe985_cryptolocker_elex.exe
Resource
win10v2004-20260911-en
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-10-16_4893a79f8afbc328c380ea00b5dbe985_cryptolocker_elex.exe
Resource
win11ltsc2024-20260911-en
6 signatures
150 seconds
General
- Target 2026-10-16_4893a79f8afbc328c380ea00b5dbe985_cryptolocker_elex.exe
- Size 1.0MB
- Sample261017-w1pcsat19l
- SHA256 356b730533e27e3ac940fd802587489f2c9891d550db0850f8fa0849b6ce90ff
- MD5 4893a79f8afbc328c380ea00b5dbe985
- SHA1 fffa8aaf69437f6f6f400dcd9159d3ed6ad6f9ce
- SHA512 aa27a1fbf91652bda175f2c7d415ac2568eaceff251dad54b545a003475174195a24ec78143e3003eee3205df93a35a94ff6a940001b12d88fa8747aec586949
- SSDEEP 12288:bGbEnOflT/ZFIjBz3xjTxynGUOUhXfSAkVH/CrYQIUMkDmndJmzS+OAPqc:bGbvflT/ZFIjBzhxwOgXKarY1iBV
- TLSH T1332508BE74D72645FE625C307FECB660DB57287ACB6BDAF24195A0301A210D2FC62817
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4948-2-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000b00000001b2c5-12.dat CryptoLocker_rule2 behavioral2/memory/3988-18-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3988-26-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 3988 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 2026-10-16_4893a79f8afbc328c380ea00b5dbe985_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 4948 wrote to memory of 3988 4948 2026-10-16_4893a79f8afbc328c380ea00b5dbe985_cryptolocker_elex.exe 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-10-16_4893a79f8afbc328c380ea00b5dbe985_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-10-16_4893a79f8afbc328c380ea00b5dbe985_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4948 -
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:3988
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 1.0MB
- SHA256 a549e6e52bc230d72394c5d95bb81b617d0605b1194d5817d428078afd6bbd1b
- MD5 bfc0499da9d3d2d0991808f2ef44ddbc
- SHA1 eabcf4926bc587fe7f37abd3e9a415bacda494ec
- SHA512 1356da0c82d642c887808cc5502063c20cb9124f8cca2cd6d7aee29c872d2ec502c1aa3bceed2c532c3514d4e43cad132952d66297300974327523fc53b2b475
- SSDEEP 12288:bGbEnOflT/ZFIjBz3xjTxynGUOUhXfSAkVH/CrYQIUMkDmndJmzS+OAPqa:bGbvflT/ZFIjBzhxwOgXKarY1iBP
- TLSH T1512508BE74D72645FE625C307FECB660DB57287ACB6BDAF24195A0301A210D2FC62817
- MD5 SHA1 SHA512 SSDEEP TLSH