Analysis Overview
SHA256
53e5bb2398ff5857e45c9ebeb3fe9bfd0a8d6a4809321582739bba553b66879c
Threat Level: Known bad
The file 53e5bb2398ff5857e45c9ebeb3fe9bfd0a8d6a4809321582739bba553b66879c was found to be: Known bad.
Malicious Activity Summary
Kutaki family
Kutaki Executable
Kutaki
Executes dropped EXE
Loads dropped DLL
Drops startup file
Maps connected drives based on registry
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Modifies Internet Explorer settings
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-07-26 18:40
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2022-07-26 18:40
Reported
2022-07-26 18:44
Platform
win7-20220715-en
Max time kernel
150s
Max time network
46s
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\Tax Payment Challan.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\Tax Payment Challan.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.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
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.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/1376-56-0x0000000074E11000-0x0000000074E13000-memory.dmp
memory/1224-57-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 17c53a651b72616b46ecb8f5215ed009 |
| SHA1 | c426cc3a5e333bafb8e0b0ed78515dc003da31c6 |
| SHA256 | bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4 |
| SHA512 | c2abab756d7351f819340857d1f500e7344838d28f744de6db39d5e3021b4382be3920b77985f057404f6b6206f09010f2bd0b2fcb61a944276145acf375c5c6 |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 17c53a651b72616b46ecb8f5215ed009 |
| SHA1 | c426cc3a5e333bafb8e0b0ed78515dc003da31c6 |
| SHA256 | bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4 |
| SHA512 | c2abab756d7351f819340857d1f500e7344838d28f744de6db39d5e3021b4382be3920b77985f057404f6b6206f09010f2bd0b2fcb61a944276145acf375c5c6 |
memory/1500-60-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 17c53a651b72616b46ecb8f5215ed009 |
| SHA1 | c426cc3a5e333bafb8e0b0ed78515dc003da31c6 |
| SHA256 | bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4 |
| SHA512 | c2abab756d7351f819340857d1f500e7344838d28f744de6db39d5e3021b4382be3920b77985f057404f6b6206f09010f2bd0b2fcb61a944276145acf375c5c6 |
memory/1500-65-0x0000000003511000-0x00000000043BD000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 17c53a651b72616b46ecb8f5215ed009 |
| SHA1 | c426cc3a5e333bafb8e0b0ed78515dc003da31c6 |
| SHA256 | bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4 |
| SHA512 | c2abab756d7351f819340857d1f500e7344838d28f744de6db39d5e3021b4382be3920b77985f057404f6b6206f09010f2bd0b2fcb61a944276145acf375c5c6 |
Analysis: behavioral2
Detonation Overview
Submitted
2022-07-26 18:40
Reported
2022-07-26 18:44
Platform
win10v2004-20220721-en
Max time kernel
152s
Max time network
138s
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\Tax Payment Challan.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\Tax Payment Challan.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
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1296 wrote to memory of 4372 | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1296 wrote to memory of 4372 | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1296 wrote to memory of 4372 | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1296 wrote to memory of 4460 | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe |
| PID 1296 wrote to memory of 4460 | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe |
| PID 1296 wrote to memory of 4460 | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.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 |
| NL | 87.248.202.1:80 | tcp | |
| NL | 87.248.202.1:80 | tcp |
Files
memory/4372-132-0x0000000000000000-mapping.dmp
memory/4460-133-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 17c53a651b72616b46ecb8f5215ed009 |
| SHA1 | c426cc3a5e333bafb8e0b0ed78515dc003da31c6 |
| SHA256 | bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4 |
| SHA512 | c2abab756d7351f819340857d1f500e7344838d28f744de6db39d5e3021b4382be3920b77985f057404f6b6206f09010f2bd0b2fcb61a944276145acf375c5c6 |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 17c53a651b72616b46ecb8f5215ed009 |
| SHA1 | c426cc3a5e333bafb8e0b0ed78515dc003da31c6 |
| SHA256 | bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4 |
| SHA512 | c2abab756d7351f819340857d1f500e7344838d28f744de6db39d5e3021b4382be3920b77985f057404f6b6206f09010f2bd0b2fcb61a944276145acf375c5c6 |