Analysis Overview
SHA256
2eeb0679d6f277074cd115ea462c110c56c68134027330097f3b5c5a3237a959
Threat Level: Shows suspicious behavior
The file 8fa3d0be26fb0078bea9668053a2278e was found to be: Shows suspicious behavior.
Malicious Activity Summary
Checks computer location settings
Loads dropped DLL
Deletes itself
Installs/modifies Browser Helper Object
Drops file in Program Files directory
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
Modifies Internet Explorer start page
Modifies registry class
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-02-04 16:36
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-02-04 16:36
Reported
2024-02-04 16:39
Platform
win10v2004-20231222-en
Max time kernel
92s
Max time network
122s
Command Line
Signatures
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E} | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\PROGRA~1\fx678Toolbar\fx678Toolbar.dll | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\ime\SPTIPIMERS.ini | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
Enumerates physical storage devices
Modifies Internet Explorer start page
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Start Page = "http://www.m4455.com" | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\ | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\InprocServer32 | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\fx678Toolbar.ShowBarEx | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\fx678Toolbar.ShowBarEx\Clsid\ = "{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\fx678Toolbar.ShowBarEx\ | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\fx678Toolbar.ShowBarEx\Clsid | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage\Command | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E} | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\ProgID\ = "fx678Toolbar.ShowBarEx" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\InprocServer32\ = "C:\\PROGRA~1\\FX678T~1\\FX678T~1.DLL" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\InprocServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\ProgID | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D} | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2708 wrote to memory of 2176 | N/A | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | C:\Windows\SysWOW64\Regsvr32.exe |
| PID 2708 wrote to memory of 2176 | N/A | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | C:\Windows\SysWOW64\Regsvr32.exe |
| PID 2708 wrote to memory of 2176 | N/A | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | C:\Windows\SysWOW64\Regsvr32.exe |
| PID 2708 wrote to memory of 4232 | N/A | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2708 wrote to memory of 4232 | N/A | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2708 wrote to memory of 4232 | N/A | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe
"C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe"
C:\Windows\SysWOW64\Regsvr32.exe
Regsvr32.exe /s C:\PROGRA~1\fx678Toolbar\fx678Toolbar.dll
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DelTemp.bat" "
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 71.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 204.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.178.17.96.in-addr.arpa | udp |
Files
memory/2708-1-0x00000000022B0000-0x00000000022B1000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.url
| MD5 | 534bb0175e95a0aae130995e507d5e05 |
| SHA1 | 295077632d9815e4af4c30718f4534133a45b5b5 |
| SHA256 | cfa730e16a89744189ce9f198e27843c1063fbce23722e73f7e72dca23221ead |
| SHA512 | df7ce3ee1c8ae3b8b2142e5929b4ab4b3a4c0a5dfab030baa26b18f0d81a310a3b48664ae148dfd02f4aa6d07d37c625ae29571c361997e88fe03323cfbdbf51 |
C:\PROGRA~1\fx678Toolbar\fx678Toolbar.dll
| MD5 | 923512e3c24ab8c1bae00c8651517f62 |
| SHA1 | 4946a5ac59527f210f9bb63584d2b75935304653 |
| SHA256 | 531ab7f4453e2807d9bcd242dc5f8d94780499932b14c10b6009c36d9dec4f21 |
| SHA512 | 2ef5bfea63e515598d30bf128acda0713fdf2e32f10003b97a9d719cd2cb1494ac5f91983b69099178c6b4593e689738d47aa277aa55a3f59f0b35d649d6ba67 |
memory/2708-26-0x0000000000400000-0x0000000000501000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\DelTemp.bat
| MD5 | b12493931e5294e78df99889cf3ab3ce |
| SHA1 | d7da714fb97888d8a8cac64e220e410c380d461e |
| SHA256 | 661eada4df31a24144e47949d7c3e9406a06b9339af09d64912dce199373d02e |
| SHA512 | 7089e09c695c6901886bca32104d1c67e65572489fa63f60ca99a14b29dd41675871c3a31249bcf109f7fc3640dc9b39027f1132820923d9a2bc7cecad9b1f05 |
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-04 16:36
Reported
2024-02-04 16:39
Platform
win7-20231215-en
Max time kernel
117s
Max time network
122s
Command Line
Signatures
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E} | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\PROGRA~1\fx678Toolbar\fx678Toolbar.dll | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\ime\SPTIPIMERS.ini | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
Enumerates physical storage devices
Modifies Internet Explorer start page
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Software\Microsoft\Internet Explorer\Main\Start Page = "http://www.m4455.com" | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\ | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\fx678Toolbar.ShowBarEx\ | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\ProgID | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\InprocServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\fx678Toolbar.ShowBarEx | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\ProgID\ = "fx678Toolbar.ShowBarEx" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D} | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\InprocServer32 | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}\InprocServer32\ = "C:\\PROGRA~1\\FX678T~1\\FX678T~1.DLL" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\fx678Toolbar.ShowBarEx\Clsid\ = "{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E}" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage\Command | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{9E7F0F05-23CF-4575-9049-7DDB9D39AA8E} | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\fx678Toolbar.ShowBarEx\Clsid | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell | C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe
"C:\Users\Admin\AppData\Local\Temp\8fa3d0be26fb0078bea9668053a2278e.exe"
C:\Windows\SysWOW64\Regsvr32.exe
Regsvr32.exe /s C:\PROGRA~1\fx678Toolbar\fx678Toolbar.dll
C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\DelTemp.bat" "
Network
Files
memory/1888-0-0x0000000000220000-0x0000000000221000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\¹ºÎïÉ̳Ç.url
| MD5 | 00a09a89ff80e65454523f88732eec7c |
| SHA1 | 1c9b57277a8338795dbbdd2b5182798450ef6428 |
| SHA256 | 067f313a60f40cf3523f0cef5a35fb34b72f0fa05e65b1746bddc9e050a1f121 |
| SHA512 | c775172e5dc0326916e39dbedd1494a83e83be48782915976b52b9286d08249a2080ca610a1c200666bf84fc576b683ebd2f7c57829adbf02b690fc59d51d4d7 |
C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.url
| MD5 | 534bb0175e95a0aae130995e507d5e05 |
| SHA1 | 295077632d9815e4af4c30718f4534133a45b5b5 |
| SHA256 | cfa730e16a89744189ce9f198e27843c1063fbce23722e73f7e72dca23221ead |
| SHA512 | df7ce3ee1c8ae3b8b2142e5929b4ab4b3a4c0a5dfab030baa26b18f0d81a310a3b48664ae148dfd02f4aa6d07d37c625ae29571c361997e88fe03323cfbdbf51 |
C:\PROGRA~1\fx678Toolbar\fx678Toolbar.dll
| MD5 | 923512e3c24ab8c1bae00c8651517f62 |
| SHA1 | 4946a5ac59527f210f9bb63584d2b75935304653 |
| SHA256 | 531ab7f4453e2807d9bcd242dc5f8d94780499932b14c10b6009c36d9dec4f21 |
| SHA512 | 2ef5bfea63e515598d30bf128acda0713fdf2e32f10003b97a9d719cd2cb1494ac5f91983b69099178c6b4593e689738d47aa277aa55a3f59f0b35d649d6ba67 |
memory/2848-23-0x00000000001E0000-0x0000000000274000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\DelTemp.bat
| MD5 | b12493931e5294e78df99889cf3ab3ce |
| SHA1 | d7da714fb97888d8a8cac64e220e410c380d461e |
| SHA256 | 661eada4df31a24144e47949d7c3e9406a06b9339af09d64912dce199373d02e |
| SHA512 | 7089e09c695c6901886bca32104d1c67e65572489fa63f60ca99a14b29dd41675871c3a31249bcf109f7fc3640dc9b39027f1132820923d9a2bc7cecad9b1f05 |
memory/1888-33-0x0000000000400000-0x0000000000501000-memory.dmp