Analysis
- max time kernel
153s - max time network
128s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system - submitted
01/12/2022, 22:45
Static task
static1
Behavioral task
behavioral1
Sample
c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
8 signatures
150 seconds
General
- Target c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe
- Size 232KB
- Sample221201-2pe8mahd99
- SHA256 c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf
- MD5 803c342392bfb194665ebe1d2b628217
- SHA1 74ad432202875d218dd12306d078d8d8e542fd99
- SHA512 9c28fa5775081ab57896fa409298df56ccf86cf7c7caa862550a364421eaf29c9c54e6f3ad0870744cec8ffd93ebd657f1b63cbd1c961e78bcc0f67996bb936a
- SSDEEP 6144:JyJj3PFKs78vpRTlEqxF6snji81RUinKbLYi:qjPhpN
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" fwnas.exe - Executes dropped EXE 1 IoCs
pid Process 2356 fwnas.exe - Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe - Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /f" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /d" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /q" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /s" fwnas.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /m" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /a" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /k" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /c" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /y" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /z" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /h" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /x" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /w" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /j" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /o" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /p" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /r" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /b" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /u" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /l" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /g" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /v" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /i" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /n" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /y" c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /t" fwnas.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fwnas = "C:\\Users\\Admin\\fwnas.exe /e" fwnas.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1048 c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe 1048 c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe 2356 fwnas.exe - Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1048 c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe 2356 fwnas.exe - Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1048 wrote to memory of 2356 1048 c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe 80 PID 1048 wrote to memory of 2356 1048 c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe 80 PID 1048 wrote to memory of 2356 1048 c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe 80
Processes
-
C:\Users\Admin\AppData\Local\Temp\c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe"C:\Users\Admin\AppData\Local\Temp\c05f2f92c7ec57d8ac753db26906d68a22924d5d3e203145996fee4c64f20fdf.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1048 -
C:\Users\Admin\fwnas.exe"C:\Users\Admin\fwnas.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:2356
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\fwnas.exe
- Size 232KB
- SHA256 dd185e61a0d6b2d4026159e2344cf6707be790ee9f002fc116a7555d2ac9a82d
- MD5 235ffe7f03627da70e8557adb9d11e00
- SHA1 f4aee4bf43d2f1c02b7cd6266c59eb4d5849c086
- SHA512 d332f99a09d46ce87ea498568c0f4916618ac2499c03d1ec183a0e2ed1c77d889b7c5b0e8605c52042f40e456ca37f0a4660df69c41798be9c4e0794ba1a02f0
- SSDEEP 6144:Dyq3PFKs78vpRTlEqxF6snji81RUinKbLYE:nPhpH
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\fwnas.exe
- Size 232KB
- SHA256 dd185e61a0d6b2d4026159e2344cf6707be790ee9f002fc116a7555d2ac9a82d
- MD5 235ffe7f03627da70e8557adb9d11e00
- SHA1 f4aee4bf43d2f1c02b7cd6266c59eb4d5849c086
- SHA512 d332f99a09d46ce87ea498568c0f4916618ac2499c03d1ec183a0e2ed1c77d889b7c5b0e8605c52042f40e456ca37f0a4660df69c41798be9c4e0794ba1a02f0
- SSDEEP 6144:Dyq3PFKs78vpRTlEqxF6snji81RUinKbLYE:nPhpH
- MD5 SHA1 SHA512 SSDEEP