Analysis
- max time kernel
150s - max time network
153s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
04/08/2026, 10:51
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-08-03_8f4b001f100d81e1f4aad5edbb3c3495_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-03_8f4b001f100d81e1f4aad5edbb3c3495_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-08-03_8f4b001f100d81e1f4aad5edbb3c3495_cryptolocker_elex.exe
- Size 1.0MB
- Sample260804-mxsflatxdw
- SHA256 2007aec95f347998e02b835ea86194dc375c462fca1d2814b3d517354d6dd3aa
- MD5 8f4b001f100d81e1f4aad5edbb3c3495
- SHA1 1759e45953068996f53efafedaa41c5bad006dd8
- SHA512 f26dce268f3c6e5b3c2515f288375d902af6b7a9ce392c6ad5c60dc3abc27548b982c922079cf8e4248f629c91d9e4e68d295dd20ea462b3701e6f8cd85ecf23
- SSDEEP 12288:bGbEnOflT/ZFIjBz3xjTxynGUOUhXfSAkVH/CrYQIUMkDmndJmzS+OAPqN:bGbvflT/ZFIjBzhxwOgXKarY1iBU
- TLSH T1352519BE74972645FE624C307FECF660DB57287ACB6BDAF24595A0301A210D2FC62817
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1152-2-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0004000000016b4e-13.dat CryptoLocker_rule2 behavioral2/memory/4204-18-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4204-20-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 4204 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 2026-08-03_8f4b001f100d81e1f4aad5edbb3c3495_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 1152 wrote to memory of 4204 1152 2026-08-03_8f4b001f100d81e1f4aad5edbb3c3495_cryptolocker_elex.exe 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-03_8f4b001f100d81e1f4aad5edbb3c3495_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-03_8f4b001f100d81e1f4aad5edbb3c3495_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1152 -
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:4204
-
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 2d5ed19ddec1e0015b9a8a40bd60b798e958fd06fd9553d5acbe4ab2cf8c04d6
- MD5 01a786ca7a8b886e57b2878624b85709
- SHA1 864d643fe83464f3c83083e4bcc1b8ae7662a9db
- SHA512 67aff5e7d174759c1b70e714ec48f3b5cace14e657001fe423bba1a525924d93ba53010983a44c475becf9a30ef486908e38cc6deb303c50993cb2274c397a30
- SSDEEP 12288:bGbEnOflT/ZFIjBz3xjTxynGUOUhXfSAkVH/CrYQIUMkDmndJmzS+OAPqm:bGbvflT/ZFIjBzhxwOgXKarY1iB7
- TLSH T1312519BE74972645FE624C307FECF660DB57287ACB6BDAF24595A0301A210D2FC62817
- MD5 SHA1 SHA512 SSDEEP TLSH