Analysis Overview
SHA256
57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb
Threat Level: Shows suspicious behavior
The file 57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb was found to be: Shows suspicious behavior.
Malicious Activity Summary
Loads dropped DLL
Executes dropped EXE
Modifies system executable filetype association
Drops file in System32 directory
Drops file in Windows directory
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-13 04:39
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-13 04:39
Reported
2024-06-13 04:41
Platform
win10v2004-20240611-en
Max time kernel
149s
Max time network
96s
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:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\MSipv | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1718253567" | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1718253567" | 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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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 960 wrote to memory of 552 | N/A | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | C:\Windows\system\rundll32.exe |
| PID 960 wrote to memory of 552 | N/A | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | C:\Windows\system\rundll32.exe |
| PID 960 wrote to memory of 552 | N/A | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | C:\Windows\system\rundll32.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe
"C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe"
C:\Windows\system\rundll32.exe
C:\Windows\system\rundll32.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 82.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| NL | 23.62.61.194:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | www.zigui.org | udp |
| HK | 103.251.237.123:80 | www.zigui.org | tcp |
| NL | 23.62.61.194:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 194.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
Files
memory/960-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | b70d9e2d4e2b819f7ead666f383ae114 |
| SHA1 | 305fd9da538eaf72d6b09e4dead67ef994853b4a |
| SHA256 | d8db2f6ab0d3deb5d60ad82e7cad2732ec3cb9446d126bf4a942b582dd54694c |
| SHA512 | fdbcd47463bbeee282cd2abe3fb74688a3b0ca0b8cdead38f3fdf3383d8e8494836654a5030545e5731cac0ef60f6847ef85c3fd1cd0cb03abdb6b74cc7fd150 |
C:\Windows\System\rundll32.exe
| MD5 | a8747311056e7343e048e083726fbc5b |
| SHA1 | 0f742bc5f528ddbb5f8773f6297a5d352b3e5c69 |
| SHA256 | 16c3d64c4fff35f909c3392240464838a380559a6738e09836708b01e8aa81ca |
| SHA512 | 60833a2dd7c35cc7672cb8d766ec7cacfd3f2fe1e01903ca4ed6f65ed6c1571c37ca8e30d9ada8b391607d311afbb931c84a430da57d43617e688d6ca7156c53 |
memory/960-13-0x0000000000400000-0x0000000000415A00-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-13 04:39
Reported
2024-06-13 04:41
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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1718253567" | 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 (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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 = "1718253567" | 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\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.exe
"C:\Users\Admin\AppData\Local\Temp\57fddb1bef42e33ccee7e8d36af892b8635900cbd447748f4423ce013cf14fbb.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/112-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | b70d9e2d4e2b819f7ead666f383ae114 |
| SHA1 | 305fd9da538eaf72d6b09e4dead67ef994853b4a |
| SHA256 | d8db2f6ab0d3deb5d60ad82e7cad2732ec3cb9446d126bf4a942b582dd54694c |
| SHA512 | fdbcd47463bbeee282cd2abe3fb74688a3b0ca0b8cdead38f3fdf3383d8e8494836654a5030545e5731cac0ef60f6847ef85c3fd1cd0cb03abdb6b74cc7fd150 |
\Windows\system\rundll32.exe
| MD5 | a8747311056e7343e048e083726fbc5b |
| SHA1 | 0f742bc5f528ddbb5f8773f6297a5d352b3e5c69 |
| SHA256 | 16c3d64c4fff35f909c3392240464838a380559a6738e09836708b01e8aa81ca |
| SHA512 | 60833a2dd7c35cc7672cb8d766ec7cacfd3f2fe1e01903ca4ed6f65ed6c1571c37ca8e30d9ada8b391607d311afbb931c84a430da57d43617e688d6ca7156c53 |
memory/112-12-0x00000000003B0000-0x00000000003C6000-memory.dmp
memory/112-18-0x00000000003B0000-0x00000000003C6000-memory.dmp
memory/112-20-0x0000000000400000-0x0000000000415A00-memory.dmp