Analysis
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max time kernel
151s -
max time network
179s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
05/12/2022, 10:13
Static task
static1
Behavioral task
behavioral1
Sample
a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe
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Size
156KB
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MD5
43b9bf65f46924f49047be71856bdfee
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SHA1
8b806213f4c5e9fbe59fd0d8ff3ee45542726f0c
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SHA256
a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3
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SHA512
6ecfefcf0c002f8ea785d8c1e189d3cf62f2d00d8b59073b5ee4d04643b646eeddfa548b7a4d3e9f4abb85abae60734a06e6333c7abe134f0b1d10136f2abb1f
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SSDEEP
3072:SBd1ME2MtU7Qv0w4ZRRQMMDwtIMCeFP4ANA4oQZiEfrj:wdWE2R7Qvb4tQTaCeFP4A+Wd
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-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" bfkoac.exe -
Executes dropped EXE 1 IoCs
pid Process 4780 bfkoac.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe -
Adds Run key to start application 2 TTPs 54 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /q" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /l" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /s" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /F" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /x" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /H" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /B" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /Z" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /L" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /K" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /j" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /Q" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /C" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /c" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /y" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /o" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /N" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /h" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /n" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /A" a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /b" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /D" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /e" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /V" bfkoac.exe Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\ a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /R" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /J" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /E" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /Y" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /d" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /X" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /I" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /k" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /M" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /S" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /v" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /g" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /p" bfkoac.exe Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\ bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /i" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /t" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /O" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /z" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /U" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /u" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /P" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /A" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /w" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /G" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /T" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /W" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /a" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /m" bfkoac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bfkoac = "C:\\Users\\Admin\\bfkoac.exe /f" bfkoac.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 3260 a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe 3260 a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe 4780 bfkoac.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 3260 a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe 4780 bfkoac.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3260 wrote to memory of 4780 3260 a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe 81 PID 3260 wrote to memory of 4780 3260 a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe 81 PID 3260 wrote to memory of 4780 3260 a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.exe"C:\Users\Admin\AppData\Local\Temp\a2b25be2168310986686a665ce3a494d388b817b9367d3f569f7335abd394bc3.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:3260 -
C:\Users\Admin\bfkoac.exe"C:\Users\Admin\bfkoac.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:4780
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
156KB
MD5b2f07d98a44c717bb161f70219dd97b6
SHA1e6e9f4397321ece3b1b84b86b95a212c14d6b8cd
SHA25608ce798b6bc2aae44db739ca1b6ce9442417508437fa700ca9874068d16b2323
SHA512caef91db8602c4f3f273367a764097c4044e4e138560618ed7e61007f579a91f8b62c007965594ab0296c70721648befef45cfa07be78266ade1f8a395990d43
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Filesize
156KB
MD5b2f07d98a44c717bb161f70219dd97b6
SHA1e6e9f4397321ece3b1b84b86b95a212c14d6b8cd
SHA25608ce798b6bc2aae44db739ca1b6ce9442417508437fa700ca9874068d16b2323
SHA512caef91db8602c4f3f273367a764097c4044e4e138560618ed7e61007f579a91f8b62c007965594ab0296c70721648befef45cfa07be78266ade1f8a395990d43