Analysis Overview
SHA256
1cbd032c682019b00f4590817698d2ddab40edde6c0a6704fac2856938252ea4
Threat Level: Known bad
The file ea6b8a444ac84e9af4e879ce16c37ff2.zip was found to be: Known bad.
Malicious Activity Summary
Tofsee
Windows security bypass
Sets service image path in registry
Modifies Windows Firewall
Creates new service(s)
Deletes itself
Executes dropped EXE
Checks computer location settings
Suspicious use of SetThreadContext
Launches sc.exe
Unsigned PE
System Location Discovery: System Language Discovery
Event Triggered Execution: Netsh Helper DLL
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-09-03 16:39
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-09-03 16:39
Reported
2024-09-03 16:41
Platform
win7-20240903-en
Max time kernel
144s
Max time network
122s
Command Line
Signatures
Tofsee
Windows security bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\yitsbjbx = "0" | C:\Windows\SysWOW64\svchost.exe | N/A |
Creates new service(s)
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\yitsbjbx\ImagePath = "C:\\Windows\\SysWOW64\\yitsbjbx\\xohkreqp.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\yitsbjbx\xohkreqp.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2660 set thread context of 2560 | N/A | C:\Windows\SysWOW64\yitsbjbx\xohkreqp.exe | C:\Windows\SysWOW64\svchost.exe |
Launches sc.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
Enumerates physical storage devices
Event Triggered Execution: Netsh Helper DLL
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key queried | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key value enumerated | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\svchost.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\yitsbjbx\xohkreqp.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe
"C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yitsbjbx\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xohkreqp.exe" C:\Windows\SysWOW64\yitsbjbx\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create yitsbjbx binPath= "C:\Windows\SysWOW64\yitsbjbx\xohkreqp.exe /d\"C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description yitsbjbx "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start yitsbjbx
C:\Windows\SysWOW64\yitsbjbx\xohkreqp.exe
C:\Windows\SysWOW64\yitsbjbx\xohkreqp.exe /d"C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | microsoft.com | udp |
| AU | 20.70.246.20:80 | microsoft.com | tcp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 8.8.8.8:53 | microsoft-com.mail.protection.outlook.com | udp |
| US | 52.101.11.0:25 | microsoft-com.mail.protection.outlook.com | tcp |
| AU | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta7.am0.yahoodns.net | udp |
| US | 67.195.228.106:25 | mta7.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| NL | 142.250.27.26:25 | smtp.google.com | tcp |
| AU | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | mail.ru | udp |
| US | 8.8.8.8:53 | mxs.mail.ru | udp |
| RU | 94.100.180.31:25 | mxs.mail.ru | tcp |
| AU | 43.231.4.7:443 | tcp |
Files
memory/1876-0-0x0000000000400000-0x000000000041E000-memory.dmp
memory/1876-3-0x00000000001C0000-0x00000000001C1000-memory.dmp
memory/1876-2-0x00000000001B0000-0x00000000001B1000-memory.dmp
memory/1876-1-0x0000000000400000-0x000000000041E000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\xohkreqp.exe
| MD5 | 0288f387a8aaf7d81ebf2bd6ba66a6ea |
| SHA1 | 0efc18a938a9d4caca8d129030fa3f346bd50a24 |
| SHA256 | 2792b45cede9fd83781774126270a31281aae9b5f65c7b572df8ecc7d2a8295e |
| SHA512 | 99e027a0ef872297d94426994b64e619624217abeb61ea93980b6eca1fd9e90cd4a04021bb687318482e56095ecf6f25d9a8ae285ce02302d1418e1cbced29af |
memory/2660-8-0x0000000000400000-0x000000000041E000-memory.dmp
memory/2560-12-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2560-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2660-15-0x0000000000400000-0x000000000041E000-memory.dmp
memory/2660-14-0x00000000050E0000-0x00000000050F1000-memory.dmp
memory/2560-9-0x0000000000080000-0x0000000000095000-memory.dmp
memory/1876-17-0x0000000000400000-0x000000000041E000-memory.dmp
memory/1876-18-0x00000000050E0000-0x00000000050F1000-memory.dmp
memory/2560-19-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2560-20-0x0000000000080000-0x0000000000095000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-09-03 16:39
Reported
2024-09-03 16:41
Platform
win10v2004-20240802-en
Max time kernel
149s
Max time network
151s
Command Line
Signatures
Tofsee
Creates new service(s)
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\ylobhbgx\ImagePath = "C:\\Windows\\SysWOW64\\ylobhbgx\\iyexygwf.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\ylobhbgx\iyexygwf.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3972 set thread context of 4720 | N/A | C:\Windows\SysWOW64\ylobhbgx\iyexygwf.exe | C:\Windows\SysWOW64\svchost.exe |
Launches sc.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
Enumerates physical storage devices
Event Triggered Execution: Netsh Helper DLL
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key queried | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key value enumerated | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\ylobhbgx\iyexygwf.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\svchost.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe
"C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ylobhbgx\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iyexygwf.exe" C:\Windows\SysWOW64\ylobhbgx\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ylobhbgx binPath= "C:\Windows\SysWOW64\ylobhbgx\iyexygwf.exe /d\"C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ylobhbgx "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ylobhbgx
C:\Windows\SysWOW64\ylobhbgx\iyexygwf.exe
C:\Windows\SysWOW64\ylobhbgx\iyexygwf.exe /d"C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| NL | 20.76.201.171:80 | microsoft.com | tcp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 8.8.8.8:53 | microsoft-com.mail.protection.outlook.com | udp |
| US | 52.101.42.0:25 | microsoft-com.mail.protection.outlook.com | tcp |
| US | 8.8.8.8:53 | 171.201.76.20.in-addr.arpa | udp |
| AU | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta5.am0.yahoodns.net | udp |
| US | 98.136.96.75:25 | mta5.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 1.202.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| NL | 142.250.27.26:25 | smtp.google.com | tcp |
| AU | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | mail.ru | udp |
| US | 8.8.8.8:53 | mxs.mail.ru | udp |
| RU | 217.69.139.150:25 | mxs.mail.ru | tcp |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |
| AU | 43.231.4.7:443 | tcp |
Files
memory/400-0-0x0000000000400000-0x000000000041E000-memory.dmp
memory/400-1-0x00000000006D0000-0x00000000006D1000-memory.dmp
memory/400-3-0x00000000006E0000-0x00000000006E1000-memory.dmp
memory/400-2-0x0000000000400000-0x000000000041E000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\iyexygwf.exe
| MD5 | 6264b9960713188c03593e6e8aa70588 |
| SHA1 | c7ba29c513b37756a79c098af791faeb760cc16a |
| SHA256 | b1c3b3e7d7dc2403c9aee2f9d8a9ad810b0f1e41e33d7083cba613a3c3dbb0a3 |
| SHA512 | 7836d57452998e1962b1d3e1477eba38624da028ab8862a9a7d572e8b6770f87f94e6a0ffd87b12dd6b055dc3584867da3af9f82ec9b2260f9acff10136a0a17 |
memory/3972-7-0x0000000000400000-0x000000000041E000-memory.dmp
memory/3972-8-0x0000000000460000-0x0000000000461000-memory.dmp
memory/4720-10-0x0000000000160000-0x0000000000175000-memory.dmp
memory/3972-13-0x0000000000400000-0x000000000041E000-memory.dmp
memory/3972-12-0x000000005F000000-0x000000005F011000-memory.dmp
memory/4720-16-0x0000000000160000-0x0000000000175000-memory.dmp
memory/400-19-0x0000000000400000-0x000000000041E000-memory.dmp
memory/4720-20-0x0000000000160000-0x0000000000175000-memory.dmp
memory/4720-21-0x0000000000160000-0x0000000000175000-memory.dmp
memory/4720-22-0x0000000000160000-0x0000000000175000-memory.dmp