Analysis
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max time kernel
153s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
29/11/2022, 17:28
Static task
static1
Behavioral task
behavioral1
Sample
91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe
Resource
win7-20221111-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe
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Size
204KB
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MD5
afb9d66f14c88f71d51e0d0049757cd7
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SHA1
b9adeee395b3a97899a62ad722c4ff140b57599d
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SHA256
91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62
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SHA512
16ef8377e2cbdf389293bbf31c85b27eea67f3798f03daebfcbb928d5faf99f10665aa7ac7f23213ea9de2af3c3f3ffc6c3ce20a276974805eb021b33f4bdec1
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SSDEEP
3072:Im4W8t80tQ9nLHbB9W0c1TqECzR/mkSYGrl9ymgYUW/5:TN14QxL7B9W0c1RCzR/fSmlE
Score
10/10
Malware Config
Signatures
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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" 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" klfuz.exe -
Executes dropped EXE 1 IoCs
pid Process 3948 klfuz.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 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /v" 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /q" klfuz.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /m" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /s" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /g" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /k" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /y" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /w" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /b" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /c" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /h" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /e" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /v" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /o" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /f" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /j" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /z" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /a" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /x" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /d" klfuz.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /n" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /i" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /t" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /r" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /p" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /u" klfuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\klfuz = "C:\\Users\\Admin\\klfuz.exe /l" klfuz.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2148 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe 2148 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe 3948 klfuz.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2148 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe 3948 klfuz.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2148 wrote to memory of 3948 2148 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe 80 PID 2148 wrote to memory of 3948 2148 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe 80 PID 2148 wrote to memory of 3948 2148 91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.exe"C:\Users\Admin\AppData\Local\Temp\91fc592c93c331f82b0bddb0e03c867f860f32e91a40860e2367bb01241dad62.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:2148 -
C:\Users\Admin\klfuz.exe"C:\Users\Admin\klfuz.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:3948
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
204KB
MD5166ae41e279c0711ff2f832b34267c34
SHA13d5f4e1814eab72fa45c43f22804318bebdb4ff4
SHA256218e616903a01a379f3809fe9b9d0d2af607855614ae62a814ab2c7c300726f9
SHA512d54d8669f8b14d3f8862f8069792e9f6c104303fc496c85cad649444931da2f0a68a05f70b0d50c71e688d137b7c493edfbaa15ff35f238f52ef59639ef654d4
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Filesize
204KB
MD5166ae41e279c0711ff2f832b34267c34
SHA13d5f4e1814eab72fa45c43f22804318bebdb4ff4
SHA256218e616903a01a379f3809fe9b9d0d2af607855614ae62a814ab2c7c300726f9
SHA512d54d8669f8b14d3f8862f8069792e9f6c104303fc496c85cad649444931da2f0a68a05f70b0d50c71e688d137b7c493edfbaa15ff35f238f52ef59639ef654d4