Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
01/12/2022, 22:51
Static task
static1
Behavioral task
behavioral1
Sample
b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe
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Size
204KB
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MD5
f7e04f304a462a84327cce14529eaab0
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SHA1
ef42bc5c3f7739eb520aa4d21a18f280d339d69a
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SHA256
b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298
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SHA512
a27a865e3b3232b89e53d7e36d38ff42710234570e7e66bfe11751a3ce999b373ad1a87c801a9c1a5d68625fc813deeeb89f3a5f49862a83cb646babda270dd0
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SSDEEP
3072:NH300tQ9nLHbB9W+U1TqEYzR/mkSYGrl9ymgYUWu9S:NX04QxL7B9W+U1RYzR/fSmlA
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-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe Set value (int) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" maafu.exe -
Executes dropped EXE 1 IoCs
pid Process 788 maafu.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /l" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /x" maafu.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /n" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /s" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /f" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /h" maafu.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /f" b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /q" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /r" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /c" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /d" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /i" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /w" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /g" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /j" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /y" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /a" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /v" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /t" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /m" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /p" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /b" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /k" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /o" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /e" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /u" maafu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\maafu = "C:\\Users\\Admin\\maafu.exe /z" maafu.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 2376 b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe 2376 b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe 788 maafu.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2376 b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe 788 maafu.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2376 wrote to memory of 788 2376 b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe 78 PID 2376 wrote to memory of 788 2376 b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe 78 PID 2376 wrote to memory of 788 2376 b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe 78
Processes
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C:\Users\Admin\AppData\Local\Temp\b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.exe"C:\Users\Admin\AppData\Local\Temp\b4cfd39d754df3eb7c6e44b9bc929bda33946f541558b4f24a7b31baf404d298.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:2376 -
C:\Users\Admin\maafu.exe"C:\Users\Admin\maafu.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:788
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
204KB
MD5a02c63774c601a26aa29a0e91e0a1f4d
SHA12655652aef56e8402deb90e431029dfe0990a637
SHA25637fd048591ad2fc12dcfd460dde10e2bd7a45a5ff229ccd2263825cd13c63029
SHA512853240448dcfdbec70dbea6092b1832dde4e7fa72c29afe99ec4cde0ffb1c63cdb56bb14d9249c765727f87a6675d1acc2d9edd64303d56b67f96f97396e58b0
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Filesize
204KB
MD5a02c63774c601a26aa29a0e91e0a1f4d
SHA12655652aef56e8402deb90e431029dfe0990a637
SHA25637fd048591ad2fc12dcfd460dde10e2bd7a45a5ff229ccd2263825cd13c63029
SHA512853240448dcfdbec70dbea6092b1832dde4e7fa72c29afe99ec4cde0ffb1c63cdb56bb14d9249c765727f87a6675d1acc2d9edd64303d56b67f96f97396e58b0