Analysis
- max time kernel
150s - max time network
150s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
29/07/2026, 02:24
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-07-29_e77fb9803091d9cee8398e1cad0cf873_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-07-29_e77fb9803091d9cee8398e1cad0cf873_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-07-29_e77fb9803091d9cee8398e1cad0cf873_cryptolocker_elex.exe
- Size 1.0MB
- Sample260729-cvvstssejb
- SHA256 79f7b6e00f8df93d566c20bad511f3e9eba32ee3fac26d0754377c93c1b267d7
- MD5 e77fb9803091d9cee8398e1cad0cf873
- SHA1 d7b18f7573c8a500319c51d408bf2137916770e1
- SHA512 8bf3f8b8144731734027ac8f3b3561b025ff0457c2b3ef081612d274bc93f3fd69ec5505c86d34a0d27499fb6ce4640e5d1b8c1856f66bcb937616ace6ebda40
- SSDEEP 12288:bGbEnOflT/ZFIjBz3xjTxynGUOUhXfSAkVH/CrYQIUMkDmndJmzS+OAPqd:bGbvflT/ZFIjBzhxwOgXKarY1iB0
- TLSH T16D2519BE74972645FE624C307FECF660DB57287ACB6BDAF24595A0301A210D2FC62817
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4332-2-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000019cc1-13.dat CryptoLocker_rule2 behavioral2/memory/3472-18-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3472-26-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 3472 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 2026-07-29_e77fb9803091d9cee8398e1cad0cf873_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 4332 wrote to memory of 3472 4332 2026-07-29_e77fb9803091d9cee8398e1cad0cf873_cryptolocker_elex.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-07-29_e77fb9803091d9cee8398e1cad0cf873_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-07-29_e77fb9803091d9cee8398e1cad0cf873_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4332 -
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:3472
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 1.0MB
- SHA256 a904dc38f474b26abc328ca570569d8f36622986e67c1a9d6b966c323b3ab8bf
- MD5 10ca787f1894051a9d2c3e0c078cea02
- SHA1 5a0b57d13aac89f37ea756d974421359747125e7
- SHA512 350b2f2b2eb74b2e28417c320fbfe3b7f2a4ae6993ed9d4ad22be08ce7b0351e2d41db1dc53c8216367b6de5482fd335291231c664d32a93e5223e35062372f6
- SSDEEP 12288:bGbEnOflT/ZFIjBz3xjTxynGUOUhXfSAkVH/CrYQIUMkDmndJmzS+OAPqd:bGbvflT/ZFIjBzhxwOgXKarY1iB8
- TLSH T14B2509BE74972645FE624C307FECF660DB57287ACB6BDAF24195A0301A210D2FC62817
- MD5 SHA1 SHA512 SSDEEP TLSH