Analysis
- max time kernel
150s - max time network
148s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
26/04/2026, 16:41
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe
Resource
win10v2004-20260130-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe
Resource
win11-20260130-en
5 signatures
150 seconds
General
- Target 2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe
- Size 46KB
- Sample260426-t7kbasbw91
- SHA256 b28c2a48b4549862857381a0b75cbf43f79e5173d7694ce3832200afa76cdcd4
- MD5 f18bd3d0a75b7a094a9335b6f81265d0
- SHA1 3e11a2596e12b1dd75e56bed1400ed907259bafe
- SHA512 f9df0b3f2bcbbf0f4b74dc6357b819395d810eb50a75222d651e85b21363b56c4bc2e84c88f3f9ec410cd13550f75b27522287de9f12650def856157c0e537f6
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXjKZ:bgGYcA/53GAGgIvF6
- TLSH T1B82333387FD62972D37BDFB586F691C6B93578223D16980D40CA43844833F66ECA1A1E
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Custom signatureDetection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4124-2-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c000000029ee3-13.dat CryptoLocker_rule2 behavioral2/memory/4944-18-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4944-26-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 4944 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 2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 4124 wrote to memory of 4944 4124 2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe 79
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-04-26_f18bd3d0a75b7a094a9335b6f81265d0_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4124 -
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:4944
-
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 9ae681d25dcffca8273c9c72b6d62d49c2a87ea7ebf82654d26a5c0120dece8b
- MD5 eaea8265573595beaa7e679ae3cf2648
- SHA1 189d9174c665df7b65eb4e0836f6553bb4c1f5bf
- SHA512 d39f7779d9b79fcbb2d8b0d70846d29636bed6ab2a9ca5103407a1ba56aa762deaad86f52d6bcb04dd0146ef74b0d7617beec7ba6ffd726b76ddc95d31ca5fa1
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXjKc:bgGYcA/53GAGgIvFD
- TLSH T1362333387FD62972D37BDFB586F691C6B93578223D16980D40CA43844833F66ECA1A1E
- MD5 SHA1 SHA512 SSDEEP TLSH