Analysis Overview
SHA256
e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e
Threat Level: Known bad
The file E-bill.exe was found to be: Known bad.
Malicious Activity Summary
Kutaki Executable
Kutaki family
Kutaki
Executes dropped EXE
Drops startup file
Loads dropped DLL
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-07-11 13:08
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2022-07-11 13:08
Reported
2022-07-11 13:11
Platform
win7-20220414-en
Max time kernel
148s
Max time network
48s
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 |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xunvfrch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xunvfrch.exe | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xunvfrch.exe | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | N/A |
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\E-bill.exe
"C:\Users\Admin\AppData\Local\Temp\E-bill.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\xunvfrch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xunvfrch.exe"
Network
Files
memory/1992-56-0x0000000075DB1000-0x0000000075DB3000-memory.dmp
memory/1240-57-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xunvfrch.exe
| MD5 | e8f5b21f536286d5fb65297300f4b11f |
| SHA1 | c21a5f1668385d581d5ddebdd9907be4c961383a |
| SHA256 | e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e |
| SHA512 | 21d16e637bdb9849656f949e46b6f37ad1b3f5338555f514804467a30b75c4f6e574ac6058b7d1ec8235c57aa16b190acb532f3905cb2bbbb9f1ad6c4362df7b |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xunvfrch.exe
| MD5 | e8f5b21f536286d5fb65297300f4b11f |
| SHA1 | c21a5f1668385d581d5ddebdd9907be4c961383a |
| SHA256 | e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e |
| SHA512 | 21d16e637bdb9849656f949e46b6f37ad1b3f5338555f514804467a30b75c4f6e574ac6058b7d1ec8235c57aa16b190acb532f3905cb2bbbb9f1ad6c4362df7b |
memory/1256-60-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xunvfrch.exe
| MD5 | e8f5b21f536286d5fb65297300f4b11f |
| SHA1 | c21a5f1668385d581d5ddebdd9907be4c961383a |
| SHA256 | e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e |
| SHA512 | 21d16e637bdb9849656f949e46b6f37ad1b3f5338555f514804467a30b75c4f6e574ac6058b7d1ec8235c57aa16b190acb532f3905cb2bbbb9f1ad6c4362df7b |
Analysis: behavioral2
Detonation Overview
Submitted
2022-07-11 13:08
Reported
2022-07-11 13:11
Platform
win10v2004-20220414-en
Max time kernel
129s
Max time network
129s
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\zwkafzch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe | C:\Users\Admin\AppData\Local\Temp\E-bill.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\E-bill.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 616 wrote to memory of 1444 | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 616 wrote to memory of 1444 | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 616 wrote to memory of 1444 | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 616 wrote to memory of 4528 | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe |
| PID 616 wrote to memory of 4528 | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe |
| PID 616 wrote to memory of 4528 | N/A | C:\Users\Admin\AppData\Local\Temp\E-bill.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\E-bill.exe
"C:\Users\Admin\AppData\Local\Temp\E-bill.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\zwkafzch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe"
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
Network
| Country | Destination | Domain | Proto |
| NL | 20.50.201.200:443 | tcp | |
| NL | 67.26.111.254:80 | tcp | |
| NL | 67.26.111.254:80 | tcp | |
| NL | 67.26.111.254:80 | tcp |
Files
memory/1444-132-0x0000000000000000-mapping.dmp
memory/4528-133-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe
| MD5 | e8f5b21f536286d5fb65297300f4b11f |
| SHA1 | c21a5f1668385d581d5ddebdd9907be4c961383a |
| SHA256 | e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e |
| SHA512 | 21d16e637bdb9849656f949e46b6f37ad1b3f5338555f514804467a30b75c4f6e574ac6058b7d1ec8235c57aa16b190acb532f3905cb2bbbb9f1ad6c4362df7b |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zwkafzch.exe
| MD5 | e8f5b21f536286d5fb65297300f4b11f |
| SHA1 | c21a5f1668385d581d5ddebdd9907be4c961383a |
| SHA256 | e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e |
| SHA512 | 21d16e637bdb9849656f949e46b6f37ad1b3f5338555f514804467a30b75c4f6e574ac6058b7d1ec8235c57aa16b190acb532f3905cb2bbbb9f1ad6c4362df7b |