Analysis Overview
SHA256
55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c
Threat Level: Known bad
The file 55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c was found to be: Known bad.
Malicious Activity Summary
Kutaki Executable
Kutaki
Kutaki family
Executes dropped EXE
Drops startup file
Loads dropped DLL
Maps connected drives based on registry
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies Internet Explorer settings
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-07-25 14:42
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral2
Detonation Overview
Submitted
2022-07-25 14:42
Reported
2022-07-25 14:45
Platform
win10v2004-20220721-en
Max time kernel
152s
Max time network
147s
Command Line
Signatures
Kutaki
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe | N/A |
Maps connected drives based on registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe
"C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"
Network
| Country | Destination | Domain | Proto |
| IE | 40.126.31.69:443 | tcp | |
| US | 8.252.118.126:80 | tcp | |
| US | 67.24.171.254:80 | tcp | |
| US | 67.24.171.254:80 | tcp | |
| IE | 20.190.159.4:443 | tcp | |
| US | 8.252.116.126:80 | tcp | |
| GB | 51.132.193.105:443 | tcp | |
| US | 67.24.171.254:80 | tcp | |
| US | 67.24.171.254:80 | tcp | |
| US | 8.8.8.8:53 | 96.108.152.52.in-addr.arpa | udp |
Files
memory/2380-132-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | feaa99287f22b1fad4acdfec4481daa3 |
| SHA1 | 9e882b1037f36bb2ae131500954c16bc1f0aa26f |
| SHA256 | 55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c |
| SHA512 | 13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366 |
memory/2836-133-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | feaa99287f22b1fad4acdfec4481daa3 |
| SHA1 | 9e882b1037f36bb2ae131500954c16bc1f0aa26f |
| SHA256 | 55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c |
| SHA512 | 13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366 |
Analysis: behavioral1
Detonation Overview
Submitted
2022-07-25 14:42
Reported
2022-07-25 14:45
Platform
win7-20220715-en
Max time kernel
150s
Max time network
49s
Command Line
Signatures
Kutaki
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe | N/A |
Maps connected drives based on registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Enumerates physical storage devices
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe
"C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"
Network
Files
memory/1660-56-0x00000000762B1000-0x00000000762B3000-memory.dmp
memory/1656-57-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | feaa99287f22b1fad4acdfec4481daa3 |
| SHA1 | 9e882b1037f36bb2ae131500954c16bc1f0aa26f |
| SHA256 | 55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c |
| SHA512 | 13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366 |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | feaa99287f22b1fad4acdfec4481daa3 |
| SHA1 | 9e882b1037f36bb2ae131500954c16bc1f0aa26f |
| SHA256 | 55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c |
| SHA512 | 13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366 |
memory/1932-60-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | feaa99287f22b1fad4acdfec4481daa3 |
| SHA1 | 9e882b1037f36bb2ae131500954c16bc1f0aa26f |
| SHA256 | 55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c |
| SHA512 | 13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366 |
memory/1932-65-0x0000000003381000-0x000000000422D000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | feaa99287f22b1fad4acdfec4481daa3 |
| SHA1 | 9e882b1037f36bb2ae131500954c16bc1f0aa26f |
| SHA256 | 55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c |
| SHA512 | 13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366 |