Analysis
- max time kernel
150s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20250502-en - resource tags
arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system - submitted
07/05/2026, 08:50
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-05-07_bf46ac3fcf27cf8227c39c5fd5bef40c_cryptolocker_elex.exe
Resource
win10v2004-20260130-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-05-07_bf46ac3fcf27cf8227c39c5fd5bef40c_cryptolocker_elex.exe
Resource
win11-20250502-en
5 signatures
150 seconds
General
- Target 2026-05-07_bf46ac3fcf27cf8227c39c5fd5bef40c_cryptolocker_elex.exe
- Size 48KB
- Sample260507-krpreaat2w
- SHA256 aa0495e2f43713d702d723fe0603eca74139a47d2a0f217b7f2465e75053aa2f
- MD5 bf46ac3fcf27cf8227c39c5fd5bef40c
- SHA1 d9a9356400b04e83d9079b3033c0ffc2b7766a5c
- SHA512 b4eee7b70cbe823274ebc98be227aa751d1527e70ae192ed6dd0e38c9854ccbd018e11916487b1d2f8f33a8b1e44f62b54506a1639f271742833bc22ff6d573f
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXQ1JL:bgGYcA/53GAGgIvFW1l
- TLSH T16B2333387FE62932E37BDFB586F691C6B93578223D16980D40CA43844833F65DCA1A1E
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/6124-2-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000d00000002ad93-13.dat CryptoLocker_rule2 behavioral2/memory/3116-18-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3116-20-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 3116 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 2026-05-07_bf46ac3fcf27cf8227c39c5fd5bef40c_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 6124 wrote to memory of 3116 6124 2026-05-07_bf46ac3fcf27cf8227c39c5fd5bef40c_cryptolocker_elex.exe 79
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-05-07_bf46ac3fcf27cf8227c39c5fd5bef40c_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-05-07_bf46ac3fcf27cf8227c39c5fd5bef40c_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:6124 -
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:3116
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 49KB
- SHA256 93b43492eac76d45d139d4f22dbfe2aab97a33ed8a89b1f2ebed7a7532bc3d9f
- MD5 13d58477d3ba134f8563a243a16aa360
- SHA1 2613417ad662cf781e9300cdcce7b137938b6b9b
- SHA512 3c1d0220bb11c5b9768e63a35bf201b9ec04fbdc5bfc165bb3cc94b7f039959af277f3676d24c68b012a94c96f6bb15966ea5fafe982b9af5565f96dce2506bb
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXQ1Ja:bgGYcA/53GAGgIvFW1g
- TLSH T1693333387FE62972E37BDFB586F691C6B93578223D16980D40CA43844833F65DCA1A1E
- MD5 SHA1 SHA512 SSDEEP TLSH