Analysis Overview
SHA256
81f8cf0d14c183be6928e42e7ec558fb39bd592b300890037c8ca19c183b5b8e
Threat Level: Shows suspicious behavior
The file b255bfb165207c91bc333eadf7dc5191 was found to be: Shows suspicious behavior.
Malicious Activity Summary
Loads dropped DLL
Adds Run key to start application
Drops file in System32 directory
Unsigned PE
Program crash
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-04 14:15
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-04 14:15
Reported
2024-03-04 14:17
Platform
win7-20240221-en
Max time kernel
140s
Max time network
122s
Command Line
Signatures
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3008 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | C:\Windows\SysWOW64\WerFault.exe |
| PID 3008 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | C:\Windows\SysWOW64\WerFault.exe |
| PID 3008 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | C:\Windows\SysWOW64\WerFault.exe |
| PID 3008 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | C:\Windows\SysWOW64\WerFault.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe
"C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3008 -s 88
Network
Files
memory/3008-0-0x0000000000400000-0x000000000040E000-memory.dmp
memory/3008-1-0x0000000000220000-0x0000000000225000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-04 14:15
Reported
2024-03-04 14:17
Platform
win10v2004-20240226-en
Max time kernel
150s
Max time network
117s
Command Line
Signatures
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\wvUkICtr.dll,#1" | C:\Windows\SysWOW64\rundll32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\rqRKAQIc.dll | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | N/A |
| File created | C:\Windows\SysWOW64\rqRKAQIc.dll | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | N/A |
| File created | C:\Windows\SysWOW64\wvUkICtr.dll | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\wvUkICtr.dll | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9DE6E729-3CBD-42A2-AE52-C99609B230D4}\InprocServer32\ThreadingModel = "Both" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9DE6E729-3CBD-42A2-AE52-C99609B230D4} | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9DE6E729-3CBD-42A2-AE52-C99609B230D4}\InprocServer32 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9DE6E729-3CBD-42A2-AE52-C99609B230D4}\InprocServer32\ = "C:\\Windows\\SysWow64\\wvUkICtr.dll" | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\winlogon.exe
winlogon.exe
C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe
"C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe"
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Windows\system32\wvUkICtr.dll,a
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\removalfile.bat "C:\Users\Admin\AppData\Local\Temp\b255bfb165207c91bc333eadf7dc5191.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 22.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 196.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 173.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 190.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 19.229.111.52.in-addr.arpa | udp |
Files
memory/1264-0-0x0000000000400000-0x000000000040E000-memory.dmp
memory/1264-1-0x0000000002030000-0x0000000002035000-memory.dmp
C:\Windows\SysWOW64\rqRKAQIc.dll
| MD5 | 6c4faf2bee227999271ce23f74797b93 |
| SHA1 | e66aaadfa53ac8dd8646475e4e94a39a44b756b6 |
| SHA256 | 471190ab85cc3ed0694758a972c54c8795429bc00a25cbe29f64296c2e4ce18d |
| SHA512 | baecb0a57a14918ca50126d29077916ec77602d47a85c41dedfc5796e645d03b97145c24dc523940b8de18fb1bb9ece1dabfe5c57a3a12741919d8151cfdfab8 |
memory/1264-7-0x0000000010000000-0x0000000010010000-memory.dmp
memory/1264-9-0x0000000002A90000-0x0000000002A95000-memory.dmp
memory/1264-13-0x0000000000400000-0x000000000040E000-memory.dmp
memory/1264-14-0x0000000010000000-0x0000000010010000-memory.dmp
memory/1264-17-0x0000000002030000-0x0000000002035000-memory.dmp
memory/216-23-0x0000000010000000-0x0000000010010000-memory.dmp
memory/216-24-0x0000000002B60000-0x0000000002B65000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\removalfile.bat
| MD5 | 9a7ef09167a6f4433681b94351509043 |
| SHA1 | 259b1375ed8e84943ca1d42646bb416325c89e12 |
| SHA256 | d5739a0510d89da572eb0b0d394d4fb4dd361cd9ee0144b9b31c590df93c3be7 |
| SHA512 | 96b84cd88a0e4b7c1122af3ed6ce5edf0a9a4e9bf79575eadfac16b2c46f1278d57755d29f21d7c6dcb4403be24b7ac7da4837c6cc9c602342a8f2b8e54883df |
memory/216-26-0x0000000010000000-0x0000000010010000-memory.dmp