Analysis
- max time kernel
150s - max time network
149s - 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, 11:05
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-08-20_f249bfcee5668e2843e0fab433d696e8_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-20_f249bfcee5668e2843e0fab433d696e8_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-08-20_f249bfcee5668e2843e0fab433d696e8_cryptolocker_elex.exe
- Size 44KB
- Sample260820-m7b7csvgkc
- SHA256 115ae28796a98270ef9bd06225998a26c2ba9d565e68025434077d224ee539da
- MD5 f249bfcee5668e2843e0fab433d696e8
- SHA1 79d026a4203d04269c380e38fb04f69f59dce422
- SHA512 57e309f151c5a360257c4489bfedafe7bc0ae456d359aaa28000b09618112dfb2a6d8d99d37b1073f572d86d1d86bbee967541c8544e9cb246311b62d88c1d93
- SSDEEP 768:bIDOw9UiaCHfjnE0Sfa7ilR0p9u6p4Uu6EIEIDKSG:bIDOw9a0DwitDwIzDKt
- TLSH T12D13FB38AEE55872D3BB9AB599F751C2BD74B4123E159C0E44CB53840822F27FDA260E
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral1/memory/4620-2-0x0000000008000000-0x0000000008009000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x0008000000024454-13.dat CryptoLocker_rule2 behavioral1/memory/3784-17-0x0000000008000000-0x0000000008009000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3784-19-0x0000000008000000-0x0000000008009000-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-1-5-21-1074038928-2032447174-945360078-1000\Control Panel\International\Geo\Nation 2026-08-20_f249bfcee5668e2843e0fab433d696e8_cryptolocker_elex.exe - Executes dropped EXE 1 IoCs
pid Process 3784 lossy.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 lossy.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2026-08-20_f249bfcee5668e2843e0fab433d696e8_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 4620 wrote to memory of 3784 4620 2026-08-20_f249bfcee5668e2843e0fab433d696e8_cryptolocker_elex.exe 84
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-20_f249bfcee5668e2843e0fab433d696e8_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-20_f249bfcee5668e2843e0fab433d696e8_cryptolocker_elex.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4620 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3784
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Temp\lossy.exe
- Size 44KB
- SHA256 f4721cc9d8c6330299934a8e18ca5b0b19aab81b93d8f994c841fdda94be8dcf
- MD5 2af4ee446a161a8b3043164eeb141aab
- SHA1 4fbd0859bb2a0a238d44e8dd27002bbdd2193693
- SHA512 5ca2611febfe6b96a56c9006c301a45641754d8ee2da2adc9cee15a9f416b5d006f1a5d3e32a40399ea84aad83fb33fb055562c4b40a4ac8eb3d1bbfff05da47
- SSDEEP 768:bIDOw9UiaCHfjnE0Sfa7ilR0p9u6p4Uu6EIEIDKSt:bIDOw9a0DwitDwIzDK+
- TLSH T11823FB38AEE55872D3BBDAB599F751C2BD74B4123E159C0E44CB53840822F27FDA260E
- MD5 SHA1 SHA512 SSDEEP TLSH