Analysis
- max time kernel
150s - max time network
149s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
02/11/2026, 10:21
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-11-01_bb5544da7b8ce588f9e7b78ad66afbb6_cryptolocker_elex.exe
Resource
win10v2004-20260911-en
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-11-01_bb5544da7b8ce588f9e7b78ad66afbb6_cryptolocker_elex.exe
Resource
win11ltsc2024-20260911-en
6 signatures
150 seconds
General
- Target 2026-11-01_bb5544da7b8ce588f9e7b78ad66afbb6_cryptolocker_elex.exe
- Size 36KB
- Sample261102-md5ltaswct
- SHA256 5d7624d853c945fcae884351e8051319a34b917b58cfcdb9a9514896df084892
- MD5 bb5544da7b8ce588f9e7b78ad66afbb6
- SHA1 dabcb79d4df6467c35fbddac3c9706bdf177cb74
- SHA512 08c17f26fba063edf3179d84ef9cd54d51fac0e968b5369dd18ac5efd562be3ed5b804eed4e26d22eef4a4f739f804ed4b3f984873a18aeac10f6af7a87d7011
- SSDEEP 384:bgX4uGLLQRcsdeQ7/nQu63Ag7YmecFanrlwfjDUkKDfWf0w3Yxp4t8n3d:bgX4zYcgTEu6QOaryfjqDDw303t
- TLSH T1E6F2833C6FD62972D37BDEB585F791C2B976B82239158C4E54CB23848D33B52AC8250E
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/5052-2-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000001138c-12.dat CryptoLocker_rule2 behavioral2/memory/4532-18-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4532-20-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 4532 hasfj.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname hasfj.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain hasfj.exe - 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 2026-11-01_bb5544da7b8ce588f9e7b78ad66afbb6_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 5052 wrote to memory of 4532 5052 2026-11-01_bb5544da7b8ce588f9e7b78ad66afbb6_cryptolocker_elex.exe 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-11-01_bb5544da7b8ce588f9e7b78ad66afbb6_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-11-01_bb5544da7b8ce588f9e7b78ad66afbb6_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5052 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
PID:4532
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 36KB
- SHA256 f8ece88d289f4c9a6b77696bd1f899cee8191e95acc4152f2f58ff6500bb970f
- MD5 2a0beb9c03e6fd6c69751ecc25bd89d8
- SHA1 97f42131940924a810b1e87d3ed88ca01746f03e
- SHA512 dc748c86f581e34fcf3e19b77ac1875665de570c17a5da78be1e1f59e4dbdd7dc9a71c655b5647fb188015596158eb6b2f8976e08ff7a07d0ef7b46342f84681
- SSDEEP 384:bgX4uGLLQRcsdeQ7/nQu63Ag7YmecFanrlwfjDUkKDfWf0w3Yxp4t8n3z:bgX4zYcgTEu6QOaryfjqDDw303D
- TLSH T15CF2843C6FD62972E37BDEB585F791C2B976B82239158C4E54CB23848D33B52AC8150E
- MD5 SHA1 SHA512 SSDEEP TLSH