Analysis Overview
SHA256
b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5
Threat Level: Shows suspicious behavior
The file b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5 was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
Loads dropped DLL
Modifies system executable filetype association
Drops file in System32 directory
Drops file in Windows directory
Unsigned PE
Modifies registry class
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-02 22:29
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-02 22:29
Reported
2024-06-02 22:32
Platform
win7-20240508-en
Max time kernel
149s
Max time network
126s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
Modifies system executable filetype association
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1717367376" | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1717367376" | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Windows\system\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe
"C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe"
C:\Windows\system\rundll32.exe
C:\Windows\system\rundll32.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | www.zigui.org | udp |
| HK | 103.251.237.123:80 | www.zigui.org | tcp |
Files
memory/2212-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | 6ba3cf39be4af62f811912156223ea81 |
| SHA1 | e147c0254960904fb54819211e9666a9f6ea8880 |
| SHA256 | b0944f12b410b975c2e72679ff8a0861e7d4241e174329c1d4e963b61833a5ff |
| SHA512 | 8f78ec2d67f391ea3cd8f0c000dadb05f694e0c77e9877f9b1c02359a06e2a18f75214aa448a65fa235b4447e01905631ca6c6fce3d178a474d3c57a5fe507e6 |
\Windows\system\rundll32.exe
| MD5 | b846ce3e10670783e8c659359b562740 |
| SHA1 | cff45bd289880ee180dbdd1c157e1a5274fcb831 |
| SHA256 | 6de25fe4b63c8bcb2e427159e756bd9740ab09c24fdb9fae142ad3f8d55fc389 |
| SHA512 | b7e02a8dfc7bf76c1b84fe969fd6140e21d14092a723e2559ab5e350d0d5440ec807e6d9b90908196a70059ac6c23514e611f923ce81b819316b7bd4ac164f51 |
memory/2212-16-0x00000000002F0000-0x0000000000306000-memory.dmp
memory/2212-17-0x00000000002F0000-0x0000000000306000-memory.dmp
memory/2184-19-0x0000000000400000-0x0000000000415A00-memory.dmp
memory/2212-21-0x0000000000400000-0x0000000000415A00-memory.dmp
memory/2212-22-0x00000000002F0000-0x00000000002F2000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-02 22:29
Reported
2024-06-02 22:32
Platform
win10v2004-20240426-en
Max time kernel
149s
Max time network
99s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Modifies system executable filetype association
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1717367379" | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1717367379" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Windows\system\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3968 wrote to memory of 2028 | N/A | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | C:\Windows\system\rundll32.exe |
| PID 3968 wrote to memory of 2028 | N/A | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | C:\Windows\system\rundll32.exe |
| PID 3968 wrote to memory of 2028 | N/A | C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe | C:\Windows\system\rundll32.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe
"C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe"
C:\Windows\system\rundll32.exe
C:\Windows\system\rundll32.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.zigui.org | udp |
| HK | 103.251.237.123:80 | www.zigui.org | tcp |
| US | 8.8.8.8:53 | 75.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
Files
memory/3968-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | 76d34b0faf8a356668d0dbd909594cdf |
| SHA1 | 1b0463ae732fd461deae7598251403d8e4a91e9a |
| SHA256 | 65143cdf6c14f3871f0d3f4232454daa042cba66aab4a1d7f3a6d3250a15a313 |
| SHA512 | d0c4a12057d1375fde6fa47d187bc60c7b5d6f62b17bfc7fb9f449ab98d3297937b88aec966ac1a4d862c7d0f99aba47b00ee65e538ecc062b5b7fd08e417cc6 |
C:\Windows\System\rundll32.exe
| MD5 | 388dd5f4b72ad505c9fca603739aa82c |
| SHA1 | 75bf92c7bb8793e6dd9821e99bcf0b152bb7ef89 |
| SHA256 | a6fe2f464ab5a693b37c56da0469eb10ec9303011afe6a51b3c478741d379f4e |
| SHA512 | 420046fd105093f6db82ee4edf7f46a5b95155d2f9135c45b5d1ed628a3e8a3a017bc5d60a776d12c1fa27fe097a3acc47540642a951c572ffde975a081eb789 |
memory/3968-13-0x0000000000400000-0x0000000000415A00-memory.dmp