Analysis
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max time kernel
164s -
max time network
175s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
27-11-2022 18:54
Static task
static1
Behavioral task
behavioral1
Sample
b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe
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Size
132KB
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MD5
22bb6773516a2ad2fef8db0874990f3b
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SHA1
d12b27396198b446ddbaab273593acdca15ff63f
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SHA256
b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded
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SHA512
af7fb54153d2b7a3abac12cda6e70a88b211492d62cadd88f61749dbd6d4fb87aee19050a3a554bbb4aa55a0e21cc69605b4aa2a46767c1835d7d93b2636fb1b
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SSDEEP
1536:cwWxwgYu9+7gWbrimfWSeJFzkRcTwdE1dIumgDL0FfxTGypitFdY:cwoT8gWi2eJFzkRswZumgDLOffitXY
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-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" yaafa.exe Set value (int) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe -
Executes dropped EXE 1 IoCs
pid Process 2708 yaafa.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe -
Adds Run key to start application 2 TTPs 54 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /Q" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /M" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /E" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /R" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /s" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /N" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /G" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /T" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /u" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /P" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /w" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /o" yaafa.exe Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Windows\CurrentVersion\Run\ b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /L" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /H" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /t" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /U" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /A" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /l" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /h" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /F" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /f" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /a" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /e" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /j" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /c" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /C" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /m" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /q" yaafa.exe Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Windows\CurrentVersion\Run\ yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /d" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /J" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /z" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /I" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /b" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /r" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /y" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /D" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /V" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /S" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /B" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /i" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /p" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /v" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /O" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /x" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /g" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /n" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /k" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /X" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /K" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /W" yaafa.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /U" b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaafa = "C:\\Users\\Admin\\yaafa.exe /Z" yaafa.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 4112 b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe 4112 b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe 2708 yaafa.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 4112 b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe 2708 yaafa.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4112 wrote to memory of 2708 4112 b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe 86 PID 4112 wrote to memory of 2708 4112 b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe 86 PID 4112 wrote to memory of 2708 4112 b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.exe"C:\Users\Admin\AppData\Local\Temp\b4c39704e03eec805fd9c7b66bbc1f9ea1bfb0c18fe403879430558fe2dd6ded.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:4112 -
C:\Users\Admin\yaafa.exe"C:\Users\Admin\yaafa.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:2708
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
132KB
MD552fe524f4795e24228be235224c5a9c5
SHA12da684891f8cfc5342381f47088d0710ef661116
SHA2568b1b5fb5c8247e378eb08a83513d51ea5445fe134c8db4e196376423c0b4ffd1
SHA5122ba237969f126459ddaac5214aa0c88f0cd0d47cd31dac972ff31eb8b82b857bb9b71d4e090bec187180d0d1c809d581184f8be8deb49958967c8a7c24c4904a
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Filesize
132KB
MD552fe524f4795e24228be235224c5a9c5
SHA12da684891f8cfc5342381f47088d0710ef661116
SHA2568b1b5fb5c8247e378eb08a83513d51ea5445fe134c8db4e196376423c0b4ffd1
SHA5122ba237969f126459ddaac5214aa0c88f0cd0d47cd31dac972ff31eb8b82b857bb9b71d4e090bec187180d0d1c809d581184f8be8deb49958967c8a7c24c4904a