Analysis
- max time kernel
150s - max time network
156s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
11/05/2026, 22:53
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
tmprl1muxcx.exe
Resource
win10v2004-20260130-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
tmprl1muxcx.exe
Resource
win11-20260130-en
6 signatures
150 seconds
General
- Target tmprl1muxcx.exe
- Size 338KB
- Sample260511-2ty7asbt9z
- SHA256 48658345a687ee209e1c91ddb669ca09474de441232b4b538d611e4544169dcd
- MD5 857c0c10e8cde6fa6f06061c234b5dcf
- SHA1 76c91ec474dacc4511cab18c94300000a5e3980e
- SHA512 7160688206cec29238ff820abacb90c99c33f522c9a7ec8f3e755d188f2243e98989004eed11535574d27feea5f6410ae20f080d7ba0d8c4e21a44ec576bcbb5
- SSDEEP 6144:pWmw0EuCNRYWgTO3x5N22vWvLRKKAX5l++SybIvC:pWkEuCST85I2vCMX5l+ZRv
- TLSH T10D74EF73B4909564E9E04DB4E6B9BD324639B8396F3C4BD792842C4E04701CBEABD783
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
Malware Config
Signatures
- Family: CryptoLocker
Ransomware family with multiple variants.
- Deletes itself 1 IoCs
pid Process 3384 {34184A33-0407-212E-3320-09040709E2C2}.exe - Executes dropped EXE 3 IoCs
pid Process 3384 {34184A33-0407-212E-3320-09040709E2C2}.exe 3460 {34184A33-0407-212E-3320-09040709E2C2}.exe 1568 {34184A33-0407-212E-3320-09040709E2C2}.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-600123060-2148212387-2211176695-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe" {34184A33-0407-212E-3320-09040709E2C2}.exe - System Location Discovery: System Language Discovery 1 TTPs 4 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 tmprl1muxcx.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language {34184A33-0407-212E-3320-09040709E2C2}.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language {34184A33-0407-212E-3320-09040709E2C2}.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language {34184A33-0407-212E-3320-09040709E2C2}.exe - Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3256 wrote to memory of 3384 3256 tmprl1muxcx.exe 80 PID 3384 wrote to memory of 3460 3384 {34184A33-0407-212E-3320-09040709E2C2}.exe 81
Processes
-
C:\Users\Admin\AppData\Local\Temp\tmprl1muxcx.exe"C:\Users\Admin\AppData\Local\Temp\tmprl1muxcx.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3256 -
C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe"C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" "/rC:\Users\Admin\AppData\Local\Temp\tmprl1muxcx.exe"2⤵
- Deletes itself
- Executes dropped EXE
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3384 -
C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe"C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000002343⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3460
-
-
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C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exeC:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1568
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
- Size 338KB
- SHA256 48658345a687ee209e1c91ddb669ca09474de441232b4b538d611e4544169dcd
- MD5 857c0c10e8cde6fa6f06061c234b5dcf
- SHA1 76c91ec474dacc4511cab18c94300000a5e3980e
- SHA512 7160688206cec29238ff820abacb90c99c33f522c9a7ec8f3e755d188f2243e98989004eed11535574d27feea5f6410ae20f080d7ba0d8c4e21a44ec576bcbb5
- SSDEEP 6144:pWmw0EuCNRYWgTO3x5N22vWvLRKKAX5l++SybIvC:pWkEuCST85I2vCMX5l+ZRv
- TLSH T10D74EF73B4909564E9E04DB4E6B9BD324639B8396F3C4BD792842C4E04701CBEABD783
- MD5 SHA1 SHA512 SSDEEP TLSH