Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
04/08/2026, 14:39
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-08-04_a7eb6f146ddaf30be97d5f06a68c3204_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-04_a7eb6f146ddaf30be97d5f06a68c3204_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-08-04_a7eb6f146ddaf30be97d5f06a68c3204_cryptolocker_elex.exe
- Size 46KB
- Sample260804-r1cxjazthy
- SHA256 ac09161ddf932a1851218075f5f63580a7c03c5138aa25ce7e6b08f63d4d28ff
- MD5 a7eb6f146ddaf30be97d5f06a68c3204
- SHA1 a2eb31da2541b912b86c936228de349e9347c478
- SHA512 7df880667e7d39e1e61bc8640dea6a6efa46d97be4772a89b5ca9b19f93510c7d74b70f4ecf611312122b655095e0acb7256b83c28233c01340dab6beeae7e97
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXQ16n:bgGYcA/53GAGgIvFW1i
- TLSH T1562344387FE62932D37BDFB586F691C6B93578223D16980D40DA43844833F66DCA1A1E
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral1/memory/4480-2-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000c0000000242e7-13.dat CryptoLocker_rule2 behavioral1/memory/4680-17-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral1/memory/4680-24-0x0000000008000000-0x000000000800A000-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 2026-08-04_a7eb6f146ddaf30be97d5f06a68c3204_cryptolocker_elex.exe - Executes dropped EXE 1 IoCs
pid Process 4680 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 2026-08-04_a7eb6f146ddaf30be97d5f06a68c3204_cryptolocker_elex.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language hasfj.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 4480 wrote to memory of 4680 4480 2026-08-04_a7eb6f146ddaf30be97d5f06a68c3204_cryptolocker_elex.exe 84
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-04_a7eb6f146ddaf30be97d5f06a68c3204_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-04_a7eb6f146ddaf30be97d5f06a68c3204_cryptolocker_elex.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4480 -
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:4680
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 46KB
- SHA256 d1276c3d43aab3a35bc8cf804c4057e9116401e4f2515ec5a278db4351f530fb
- MD5 abe7491703bac8be2cb065b53f09393f
- SHA1 1999349ae6d379adaacf1565b676215260bef0e6
- SHA512 39d522337969ff1d3f464ff5796cf0161103993d434e95efe4586f132480631219a8f83c6f7787ffc8ada0fe8f48c1be4e3c224b3a6d97af0e98060851125254
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXQ16lM:bgGYcA/53GAGgIvFW1v
- TLSH T1772343387FE62932E37BDFB586F691C6B93578223D16980D40DA43444833F66DCA1A1E
- MD5 SHA1 SHA512 SSDEEP TLSH