Analysis Overview
SHA256
3cb6cffbee2f03febb5c5ffc0e6b6f7d06e184ee69c6d873bc4619fe4ebfcce7
Threat Level: Known bad
The file a2adb7966f88e6c0e15a8f5a04404fcf.exe was found to be: Known bad.
Malicious Activity Summary
Tofsee
Windows security bypass
Creates new service(s)
Sets service image path in registry
Modifies Windows Firewall
Deletes itself
Executes dropped EXE
Suspicious use of SetThreadContext
Launches sc.exe
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-01-07 19:21
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-07 19:21
Reported
2024-01-07 19:23
Platform
win7-20231129-en
Max time kernel
119s
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\ziyvzfpp = "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\ziyvzfpp\ImagePath = "C:\\Windows\\SysWOW64\\ziyvzfpp\\ygvzmktt.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\ziyvzfpp\ygvzmktt.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2664 set thread context of 2756 | N/A | C:\Windows\SysWOW64\ziyvzfpp\ygvzmktt.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
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.exe
"C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ziyvzfpp\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ygvzmktt.exe" C:\Windows\SysWOW64\ziyvzfpp\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ziyvzfpp binPath= "C:\Windows\SysWOW64\ziyvzfpp\ygvzmktt.exe /d\"C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ziyvzfpp "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ziyvzfpp
C:\Windows\SysWOW64\ziyvzfpp\ygvzmktt.exe
C:\Windows\SysWOW64\ziyvzfpp\ygvzmktt.exe /d"C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.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
C:\Windows\SysWOW64\svchost.exe
svchost.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 20.112.250.133:80 | 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 |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta5.am0.yahoodns.net | udp |
| US | 67.195.228.111:25 | mta5.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| US | 108.177.127.27:25 | smtp.google.com | tcp |
| HK | 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 |
| HK | 43.231.4.7:443 | tcp |
Files
memory/2416-2-0x00000000002A0000-0x00000000002B3000-memory.dmp
memory/2416-1-0x0000000003740000-0x0000000003840000-memory.dmp
memory/2416-4-0x0000000000400000-0x00000000036CD000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\ygvzmktt.exe
| MD5 | ac6d1876a306a54c19def1c8e257a8b9 |
| SHA1 | d960ba60e7b55e263143df239ae9f7b42dab73cf |
| SHA256 | 66ee251bbcbaacdf9062897c83e38e02fe331631b041caf6c03379744a7dd8b0 |
| SHA512 | a7c87cacd14dd1184156b6f554c7793faf638b2dac471474d1651ea101ca53711950fa0bfe1bdb487704d29c9d1efb94119d99180ee2cc0ccb0697cfb22dcf2a |
C:\Windows\SysWOW64\ziyvzfpp\ygvzmktt.exe
| MD5 | ea96e0346a6397f0459f83ca458841a7 |
| SHA1 | a979ce56ca0dbde04e0ec77b94c143fc4e7c3872 |
| SHA256 | 154fbfb86c78f728df08893f8dfaf0e866d15ece0e2f53f6dc54bee82097ddf2 |
| SHA512 | 994fcdc9466110944f1404da13d6e6c62f26eb61567b0fe8b142d9e2a15cc10dc88e3776e5b51f0f85805460867a40ca7d385ae48f92c5902a093f7692fceaf1 |
memory/2664-9-0x0000000000290000-0x0000000000390000-memory.dmp
memory/2756-13-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/2756-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2664-15-0x0000000000400000-0x00000000036CD000-memory.dmp
memory/2756-10-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/2756-18-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/2664-17-0x0000000000400000-0x00000000036CD000-memory.dmp
memory/2756-19-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/2756-20-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/2416-7-0x0000000000400000-0x00000000036CD000-memory.dmp
memory/2756-21-0x00000000000D0000-0x00000000000E5000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-07 19:21
Reported
2024-01-07 19:23
Platform
win10v2004-20231215-en
Max time kernel
3s
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 |
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
Processes
C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.exe
"C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ylbrdnvs\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gtfcvinx.exe" C:\Windows\SysWOW64\ylbrdnvs\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ylbrdnvs binPath= "C:\Windows\SysWOW64\ylbrdnvs\gtfcvinx.exe /d\"C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ylbrdnvs "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ylbrdnvs
C:\Windows\SysWOW64\ylbrdnvs\gtfcvinx.exe
C:\Windows\SysWOW64\ylbrdnvs\gtfcvinx.exe /d"C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.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
C:\Windows\SysWOW64\svchost.exe
svchost.exe
Network
| Country | Destination | Domain | Proto |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 59.128.231.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 52.179.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 20.112.250.133:80 | 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 | 146.78.124.51.in-addr.arpa | udp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta5.am0.yahoodns.net | udp |
| US | 67.195.228.111:25 | mta5.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.136.104.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.160.77.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| US | 108.177.127.27:25 | smtp.google.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 62.179.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| 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 |
| US | 8.8.8.8:53 | 23.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.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 |
| HK | 43.231.4.7:443 | tcp | |
| GB | 96.16.110.41:443 | tcp |
Files
memory/2676-2-0x00000000037A0000-0x00000000037B3000-memory.dmp
memory/2676-1-0x0000000003800000-0x0000000003900000-memory.dmp
memory/2676-4-0x0000000000400000-0x00000000036CD000-memory.dmp
memory/2676-8-0x00000000037A0000-0x00000000037B3000-memory.dmp
memory/2676-7-0x0000000000400000-0x00000000036CD000-memory.dmp
memory/2304-13-0x00000000036E0000-0x00000000037E0000-memory.dmp
memory/3364-10-0x00000000001D0000-0x00000000001E5000-memory.dmp
memory/3364-15-0x00000000001D0000-0x00000000001E5000-memory.dmp
memory/3364-18-0x00000000001D0000-0x00000000001E5000-memory.dmp
memory/2304-17-0x0000000000400000-0x00000000036CD000-memory.dmp
memory/3364-16-0x00000000001D0000-0x00000000001E5000-memory.dmp
memory/2304-19-0x0000000000400000-0x00000000036CD000-memory.dmp
memory/3364-20-0x00000000001D0000-0x00000000001E5000-memory.dmp