Analysis Overview
SHA256
c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070
Threat Level: Known bad
The file c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070 was found to be: Known bad.
Malicious Activity Summary
UPX dump on OEP (original entry point)
Modifies WinLogon for persistence
UPX dump on OEP (original entry point)
Drops file in Drivers directory
Sets service image path in registry
UPX packed file
ACProtect 1.3x - 1.4x DLL software
Loads dropped DLL
Modifies WinLogon
Installs/modifies Browser Helper Object
Adds Run key to start application
Drops file in System32 directory
Unsigned PE
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-25 00:31
Signatures
UPX dump on OEP (original entry point)
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-25 00:31
Reported
2024-03-25 00:34
Platform
win7-20240221-en
Max time kernel
142s
Max time network
127s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe," | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
UPX dump on OEP (original entry point)
| 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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Drops file in Drivers directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\drivers\spools.exe | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\drivers\spools.exe | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Schedule\ImagePath = "C:\\Windows\\system32\\drivers\\spools.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
ACProtect 1.3x - 1.4x DLL software
| 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 |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
UPX packed file
| 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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{B4F3A835-0E21-4959-BA22-42B3008E02FF} | C:\Windows\SysWOW64\reg.exe | N/A |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects | C:\Windows\SysWOW64\reg.exe | N/A |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{18DF081C-E8AD-4283-A596-FA578C2EBDC3} | C:\Windows\SysWOW64\reg.exe | N/A |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{72853161-30C5-4D22-B7F9-0BBC1D38A37E} | C:\Windows\SysWOW64\reg.exe | N/A |
Modifies WinLogon
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UIHost = "logonui.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\ftpdll.dll | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1784 wrote to memory of 2544 | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | C:\Windows\SysWOW64\reg.exe |
| PID 1784 wrote to memory of 2544 | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | C:\Windows\SysWOW64\reg.exe |
| PID 1784 wrote to memory of 2544 | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | C:\Windows\SysWOW64\reg.exe |
| PID 1784 wrote to memory of 2544 | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | C:\Windows\SysWOW64\reg.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe
"C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe"
C:\Windows\SysWOW64\reg.exe
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | www.tonysbilvard.com | udp |
| US | 8.8.8.8:53 | vvsecurity.cn | udp |
| US | 8.8.8.8:53 | winupdate.cn | udp |
Files
memory/1784-0-0x0000000000400000-0x0000000000433000-memory.dmp
\Windows\SysWOW64\ftpdll.dll
| MD5 | 91d31d186f3bbd935946697f8b34d5a0 |
| SHA1 | 78eccbde63c6913759adf819622ebc3508840f94 |
| SHA256 | 1767b9108ac9ba4e5d0a7bb104a3462ec4dd5076d3245ad58d25fd1a972fecd0 |
| SHA512 | 16bdd3bbf2f51b585617a9d398ce1fa8b997e8dbb92ca2d441cab833733255d364537f1ecf9fa020014af759dc6baf4e1f60bfcdb510062c9ecb01ac64c05db4 |
memory/1784-5-0x0000000010000000-0x000000001010B000-memory.dmp
C:\Users\Admin\AppData\Local\cftmon.exe
| MD5 | 38b3a4bf1b88bc3316fc7e7dbf0e1c29 |
| SHA1 | 24fdb7ba082c69b444adc6f5aa6c7ece0b87e8a1 |
| SHA256 | 4bf64a27b984a88688ad0a7471f37abac83f8fc9d38eae126f4df9a225325882 |
| SHA512 | 72e2595962a9a8d0faa2c25c21f8ec139252292002291b731502118111252d1689f811cba323d57331cb50d578cc5705ee3e43c90790d27e8e72da13485a6678 |
memory/1784-12-0x0000000000400000-0x0000000000433000-memory.dmp
memory/1784-13-0x0000000010000000-0x000000001010B000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-25 00:31
Reported
2024-03-25 00:34
Platform
win10v2004-20240226-en
Max time kernel
149s
Max time network
151s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe," | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
UPX dump on OEP (original entry point)
| 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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Drops file in Drivers directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\drivers\spools.exe | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\drivers\spools.exe | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Schedule\ImagePath = "C:\\Windows\\system32\\drivers\\spools.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
ACProtect 1.3x - 1.4x DLL software
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
UPX packed file
| 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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C} | C:\Windows\SysWOW64\reg.exe | N/A |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA} | C:\Windows\SysWOW64\reg.exe | N/A |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects | C:\Windows\SysWOW64\reg.exe | N/A |
Modifies WinLogon
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UIHost = "logonui.exe" | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\ftpdll.dll | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1628 wrote to memory of 2528 | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | C:\Windows\SysWOW64\reg.exe |
| PID 1628 wrote to memory of 2528 | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | C:\Windows\SysWOW64\reg.exe |
| PID 1628 wrote to memory of 2528 | N/A | C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe | C:\Windows\SysWOW64\reg.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe
"C:\Users\Admin\AppData\Local\Temp\c98aaf3267fcfb8b2aa45b86f6a8b8b16ac4da282d2fba6eb33ad43ef7324070.exe"
C:\Windows\SysWOW64\reg.exe
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 64.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.tonysbilvard.com | udp |
| US | 8.8.8.8:53 | vvsecurity.cn | udp |
| US | 8.8.8.8:53 | winupdate.cn | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.241.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 119.110.54.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 32.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 91.16.208.104.in-addr.arpa | udp |
Files
memory/1628-0-0x0000000000400000-0x0000000000433000-memory.dmp
C:\Windows\SysWOW64\ftpdll.dll
| MD5 | 91d31d186f3bbd935946697f8b34d5a0 |
| SHA1 | 78eccbde63c6913759adf819622ebc3508840f94 |
| SHA256 | 1767b9108ac9ba4e5d0a7bb104a3462ec4dd5076d3245ad58d25fd1a972fecd0 |
| SHA512 | 16bdd3bbf2f51b585617a9d398ce1fa8b997e8dbb92ca2d441cab833733255d364537f1ecf9fa020014af759dc6baf4e1f60bfcdb510062c9ecb01ac64c05db4 |
memory/1628-6-0x0000000010000000-0x000000001010B000-memory.dmp
C:\Users\Admin\AppData\Local\cftmon.exe
| MD5 | 6bacdc1eb8d8360790ec15cb31a35241 |
| SHA1 | a2f2e6f561e95d5bc7e9be5595791994d84dc00c |
| SHA256 | 59cb80fe9ec6bd5fe81321ad0d204b295868877634602b76c59a6b328a349e5e |
| SHA512 | a62edd01cb28966d47e4f7b532e90444ecadd8d66244ecbc87e7b91760ee5fdf06711b20f579f751d81f17f3660ccd071efd8d42455e4653323c4ce1e615ad29 |
memory/1628-13-0x0000000000400000-0x0000000000433000-memory.dmp