Analysis Overview
SHA256
75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2
Threat Level: Shows suspicious behavior
The file 75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2 was found to be: Shows suspicious behavior.
Malicious Activity Summary
Modifies system executable filetype association
Loads dropped DLL
Executes dropped EXE
Drops file in System32 directory
Drops file in Windows directory
Unsigned PE
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-11 13:32
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-11 13:32
Reported
2024-06-11 13:35
Platform
win10v2004-20240426-en
Max time kernel
149s
Max time network
150s
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 |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.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 |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| File opened for modification | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.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\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1718112761" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1718112761" | 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\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | 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 |
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\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.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 3636 wrote to memory of 1372 | N/A | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | C:\Windows\system\rundll32.exe |
| PID 3636 wrote to memory of 1372 | N/A | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | C:\Windows\system\rundll32.exe |
| PID 3636 wrote to memory of 1372 | N/A | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | C:\Windows\system\rundll32.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe
"C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.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 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.zigui.org | udp |
| US | 8.8.8.8:53 | 203.107.17.2.in-addr.arpa | udp |
| HK | 103.251.237.123:80 | www.zigui.org | tcp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 216.107.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 152.107.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.173.189.20.in-addr.arpa | udp |
Files
memory/3636-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | cd2b66f40f6073c4efe0c1b26a49e6ff |
| SHA1 | e953c8ff54952912f9f6a74dcff4c9b3f3cc8f70 |
| SHA256 | 7c1beb11db2d5c470bff0da93750f891123bcbc80c16b633dd0d72b013108192 |
| SHA512 | cc89294e0983b441b6ddce33630420474ba5704843bbed176c1a955126adfa90780f381609522e06661f97640d352d5b8e0ec2f92020417b470743f72aa3af58 |
C:\Windows\System\rundll32.exe
| MD5 | d2c0dd76e05e3ed2106089468b2d65a2 |
| SHA1 | 642967312de7e370e19515651b6cb460bec6e87e |
| SHA256 | 13cd0eb0d1b9065937173ff5e79f8b5088e0690d65e60d3782a491366697d2e3 |
| SHA512 | 8e9c96fe25347aa869797e0ceba8adf0d74ad34a76a24e4fb9eb23dfdfe521b130802e3b2c8ee303f365b2bce51e70ff7bd211645c0c20b79a7ceba5d0dfc69a |
memory/1372-13-0x0000000000400000-0x0000000000415A00-memory.dmp
memory/3636-14-0x0000000000400000-0x0000000000415A00-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-11 13:32
Reported
2024-06-11 13:35
Platform
win7-20240221-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\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
Modifies system executable filetype association
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.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 |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.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\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1718112766" | 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\txtfile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1718112766" | 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 |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506" | C:\Windows\system\rundll32.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\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.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\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.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\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.exe
"C:\Users\Admin\AppData\Local\Temp\75ee8e5f930b9f1557a883648bc6bbf3017f772240dd5b0003c60f9a2b93aac2.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/1936-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | 051c6c59b0fd465df0cba0f0d61e0fb9 |
| SHA1 | 42af0b949915f4639c642a7acf065a3d1de7c116 |
| SHA256 | 14e9b023c7dc0266f66da9106b4befbcb0be6d57ed8e0602114898f2ef819747 |
| SHA512 | f44e43ce5636caebbdda2d42a2b4d1a281a980dc2a635226337725716ad56e8063a8fbd168537c572dba18048e9d9ddbafc196ac2840d1605c86e9b232289b60 |
\Windows\system\rundll32.exe
| MD5 | f4bc70ff1befb9187978568ebf17ea34 |
| SHA1 | 369570a073cc7ddbd1f9a71d0189224d9dee3b9d |
| SHA256 | 01b25196d1c74b7ffef73d46e4a3b32016a45d1dc5393e676a9d822bc8210087 |
| SHA512 | 61909cefc026ccc5b2095aa0346d5bb053b96fdae843eb5ac44e33c5ef791ebfa56be982b0d7fae7312dc194b9d7034bf87ed09596d3726fb9787f57becf6c87 |
memory/1936-12-0x0000000000370000-0x0000000000386000-memory.dmp
memory/3004-19-0x0000000000400000-0x0000000000415A00-memory.dmp
memory/1936-18-0x0000000000370000-0x0000000000386000-memory.dmp
memory/1936-21-0x0000000000400000-0x0000000000415A00-memory.dmp