Analysis Overview
SHA256
68f90121aaa88d93dfd4cb25fb182d0445bbd9a5a8563b4fe14b3eb341188df6
Threat Level: Known bad
The file 8ab8bf8a5cf4147b3fab5b214db8454e was found to be: Known bad.
Malicious Activity Summary
Modifies WinLogon for persistence
Sets service image path in registry
Drops file in Drivers directory
ACProtect 1.3x - 1.4x DLL software
UPX packed file
Loads dropped DLL
Adds Run key to start application
Enumerates connected drives
Modifies WinLogon
Installs/modifies Browser Helper Object
Drops file in System32 directory
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-02-02 22:42
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-02 22:42
Reported
2024-02-02 22:46
Platform
win7-20231215-en
Max time kernel
151s
Max time network
126s
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\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.exe | 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\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\drivers\spools.exe | C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.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 |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" | C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" | C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
Enumerates connected drives
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| 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 |
| 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 |
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\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
"C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe"
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.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 | fewfwe.com | udp |
| US | 3.19.116.195:80 | fewfwe.com | tcp |
Files
memory/2424-0-0x0000000000400000-0x0000000000423000-memory.dmp
memory/2424-1-0x00000000021C0000-0x00000000021E3000-memory.dmp
memory/2512-2-0x0000000000400000-0x0000000000423000-memory.dmp
C:\Users\Admin\AppData\Local\cftmon.exe
| MD5 | 5a1b1f090db74dfc9245dd0c9fd3b6c6 |
| SHA1 | 36833dbfd292ee3883eabd17bc46e0c6a4d64956 |
| SHA256 | 6808301d79fb89f3455cada9c712f603533f2a2a05f55a1c33887b72afc38357 |
| SHA512 | 43d69bb2fa3eb0668074c864ebce587bc1d805b8e94e0cedb68987036ce5c0cbeefabd7b3a7518e832d85cbcb576e84def471c4b914d4d3f981c7669414a3d53 |
\Windows\SysWOW64\ftpdll.dll
| MD5 | d807aa04480d1d149f7a4cac22984188 |
| SHA1 | ffd5be65fd10017e34c11cecd105ebf4aa6c0cd9 |
| SHA256 | eddf092d901afe128322910c3ff41a3f242d33d6b4cdf91ece327076b324ccbb |
| SHA512 | 875543583c20ab164f37a4fb2587d234ce0a15d649d22b0d1dae5933f0a7683db170578746ea4458c51fec26e2243c6ec00dc10db8d4289789e50d5800cf863e |
memory/2424-13-0x0000000010000000-0x000000001010B000-memory.dmp
memory/2424-14-0x0000000010000000-0x000000001010B000-memory.dmp
memory/2424-15-0x0000000000400000-0x0000000000423000-memory.dmp
memory/2424-16-0x00000000021C0000-0x00000000021E3000-memory.dmp
memory/2768-17-0x0000000000400000-0x0000000000423000-memory.dmp
memory/2512-18-0x0000000000400000-0x0000000000423000-memory.dmp
memory/2676-19-0x0000000000400000-0x0000000000423000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-02-02 22:42
Reported
2024-02-02 22:47
Platform
win10v2004-20231215-en
Max time kernel
161s
Max time network
175s
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\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
Drops file in Drivers directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\drivers\spools.exe | C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
| File created | C:\Windows\SysWOW64\drivers\spools.exe | C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.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 |
| 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\8ab8bf8a5cf4147b3fab5b214db8454e.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 |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" | C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" | C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
Enumerates connected drives
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| 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\{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 |
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\8ab8bf8a5cf4147b3fab5b214db8454e.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\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
"C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe"
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Windows\SysWOW64\reg.exe
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
C:\Users\Admin\AppData\Local\Temp\8ab8bf8a5cf4147b3fab5b214db8454e.exe
Network
| Country | Destination | Domain | Proto |
| NL | 52.142.223.178:80 | tcp | |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 177.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | fewfwe.com | udp |
| US | 3.140.13.188:80 | fewfwe.com | tcp |
| US | 8.8.8.8:53 | 188.13.140.3.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 30.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 210.178.17.96.in-addr.arpa | udp |
Files
memory/2116-0-0x0000000000400000-0x0000000000423000-memory.dmp
memory/4048-1-0x0000000000400000-0x0000000000423000-memory.dmp
C:\Users\Admin\AppData\Local\cftmon.exe
| MD5 | 894e01aaa1f501fa3c8930d535cf513f |
| SHA1 | a86e37782aef20f5f5cf6c3468727f8b8ea8e3e6 |
| SHA256 | 7676fab10ac3d7c697a6395d180d0ec24cd0f2f8684fcf899a8108fcda485b20 |
| SHA512 | 8703bded7c912e746e45fd461557eff32a4a100fabfd814abfc91aa3e24d0ac5cef41ba37d4ff3cad3901f4f0442edaa6bdaa3d0536a0f25a2582f9f4c51855e |
C:\Windows\SysWOW64\ftpdll.dll
| MD5 | d807aa04480d1d149f7a4cac22984188 |
| SHA1 | ffd5be65fd10017e34c11cecd105ebf4aa6c0cd9 |
| SHA256 | eddf092d901afe128322910c3ff41a3f242d33d6b4cdf91ece327076b324ccbb |
| SHA512 | 875543583c20ab164f37a4fb2587d234ce0a15d649d22b0d1dae5933f0a7683db170578746ea4458c51fec26e2243c6ec00dc10db8d4289789e50d5800cf863e |
memory/2116-13-0x0000000010000000-0x000000001010B000-memory.dmp
memory/2116-14-0x0000000010000000-0x000000001010B000-memory.dmp
memory/2116-15-0x0000000010000000-0x000000001010B000-memory.dmp
memory/2116-16-0x0000000000400000-0x0000000000423000-memory.dmp
memory/4048-17-0x0000000000400000-0x0000000000423000-memory.dmp
memory/2088-18-0x0000000000400000-0x0000000000423000-memory.dmp
memory/1700-19-0x0000000000400000-0x0000000000423000-memory.dmp