Analysis
- max time kernel
150s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
04/08/2026, 07:41
Static task
static1
3 signatures
Behavioral task
behavioral1
Sample
2026-08-04_39c7d23c4b0730249c2dfbd934e2eefb_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-04_39c7d23c4b0730249c2dfbd934e2eefb_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
6 signatures
150 seconds
General
- Target 2026-08-04_39c7d23c4b0730249c2dfbd934e2eefb_cryptolocker_elex.exe
- Size 3.4MB
- Sample260804-jjee2aal3w
- SHA256 a026f8a4046db4061dc94df823266d68e9b69930115b22d2cbea855a2e3adf47
- MD5 39c7d23c4b0730249c2dfbd934e2eefb
- SHA1 33d7a6ccdcbd5f8ba0d85748db93b15c69b438d0
- SHA512 b7f568d53003b03c39b63bf0092da0a93dbd111afcec53784f4976e7f894d00e7613794c174951b3a904a0b93120d982cdedbef945f6e8a73afb678f95074f7a
- SSDEEP 49152:uR/ZFIjBzT1CIdSPHf0f/ZFIjBzGAyGs+Q7uOZzNvBLEdff:uR/ZFIjBzldUfs/ZFIjBz7jSZDa
- TLSH T1B7F55C6F68A611A4DCFAC8305BE9F222FF6334594739A7F31AA091201F25BD1F875712
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3704-2-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000019ce0-13.dat CryptoLocker_rule2 behavioral2/memory/1112-18-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1112-26-0x0000000008000000-0x0000000008022000-memory.dmp CryptoLocker_rule2 - Detects executables built or packed with MPress PE compressor 1 IoCs
resource yara_rule behavioral2/files/0x0008000000019ce0-13.dat INDICATOR_EXE_Packed_MPress - Executes dropped EXE 1 IoCs
pid Process 1112 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_39c7d23c4b0730249c2dfbd934e2eefb_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 3704 wrote to memory of 1112 3704 2026-08-04_39c7d23c4b0730249c2dfbd934e2eefb_cryptolocker_elex.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-04_39c7d23c4b0730249c2dfbd934e2eefb_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-04_39c7d23c4b0730249c2dfbd934e2eefb_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3704 -
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:1112
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 3.4MB
- SHA256 84e96650f16b4f610a6eb35835b9b55ae046690b161190e50204e9772ab502e5
- MD5 35d377c4fe298d80082fd92df875c57d
- SHA1 224a55db1e389d37af0c320b945dcc5a0a753425
- SHA512 ba58adcd21cdf422c9bd6d4982504ed2f36ea050bba5b6f1a8ab016d13928987e39f4df07ad1f3837e6997d6460fb0512ca17fcbbdcd2c9412c2a3144ee50b4b
- SSDEEP 49152:uR/ZFIjBzT1CIdSPHf0f/ZFIjBzGAyGs+Q7uOZzNvBLEdfc:uR/ZFIjBzldUfs/ZFIjBz7jSZD1
- TLSH T1E7F55C6F68A611A4DCFAC8305BE9F222FF6334594739A7F31AA091201F25BD1F875712
- MD5 SHA1 SHA512 SSDEEP TLSH