Analysis Overview
SHA256
ef25242cd655ccffe910bec6a1625773d929fb0bc657a8af0a72442af126c7b1
Threat Level: Known bad
The file de4b82a7ffeafcc4720ea974858808fd 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
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-25 15:05
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-25 15:05
Reported
2024-03-25 15:07
Platform
win7-20240221-en
Max time kernel
150s
Max time network
152s
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\osywdkhm = "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\osywdkhm\ImagePath = "C:\\Windows\\SysWOW64\\osywdkhm\\lpwacfvh.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\osywdkhm\lpwacfvh.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2052 set thread context of 2540 | N/A | C:\Windows\SysWOW64\osywdkhm\lpwacfvh.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\de4b82a7ffeafcc4720ea974858808fd.exe
"C:\Users\Admin\AppData\Local\Temp\de4b82a7ffeafcc4720ea974858808fd.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\osywdkhm\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lpwacfvh.exe" C:\Windows\SysWOW64\osywdkhm\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create osywdkhm binPath= "C:\Windows\SysWOW64\osywdkhm\lpwacfvh.exe /d\"C:\Users\Admin\AppData\Local\Temp\de4b82a7ffeafcc4720ea974858808fd.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description osywdkhm "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start osywdkhm
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\osywdkhm\lpwacfvh.exe
C:\Windows\SysWOW64\osywdkhm\lpwacfvh.exe /d"C:\Users\Admin\AppData\Local\Temp\de4b82a7ffeafcc4720ea974858808fd.exe"
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 |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta7.am0.yahoodns.net | udp |
| US | 67.195.204.72:25 | mta7.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| BE | 142.250.110.27:25 | smtp.google.com | 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 | refabyd.info | udp |
Files
memory/3020-1-0x00000000005E0000-0x00000000006E0000-memory.dmp
memory/3020-2-0x0000000000220000-0x0000000000233000-memory.dmp
memory/3020-3-0x0000000000400000-0x000000000046E000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\lpwacfvh.exe
| MD5 | edf29686701f2c850340d956b4f7b241 |
| SHA1 | c82e4490add55ccde7a12229d0c61e9cb77c9eaa |
| SHA256 | 54044a0551c1f5810cdd6dd371855890d0478bbe4f652d54c1452d33781b3647 |
| SHA512 | 7c7d6436d3f69861bb2697314951498aa685e132601fd21c100f105ceda527b19abb552da4e55b02de788d3aab802061c3d8c36e4cfa5a644aaef8a9be0dbcd5 |
memory/3020-6-0x0000000000400000-0x000000000046E000-memory.dmp
memory/3020-7-0x0000000000220000-0x0000000000233000-memory.dmp
C:\Windows\SysWOW64\osywdkhm\lpwacfvh.exe
| MD5 | dfdfcbc34afa9d39dbe423373d6f83aa |
| SHA1 | b7dcea60759e86e7e3f41508643099a98d4bec41 |
| SHA256 | 2c724ed03fdfe4c9617d57b3d49875fac92c4c22c8c14da39bfcb06e7045795e |
| SHA512 | 00315a14d7e3326097abe6e9b2ada52ad3cd1a518584891f41825480f23a50b71d103f616b4a7535a9bd8abfa5cde01106e470d9a642dd1c6d1fbc930c65caa6 |
memory/2052-10-0x0000000000530000-0x0000000000630000-memory.dmp
memory/2052-11-0x0000000000400000-0x000000000046E000-memory.dmp
memory/2540-12-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2540-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2540-15-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2052-17-0x0000000000400000-0x000000000046E000-memory.dmp
memory/2540-20-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2540-21-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2540-22-0x00000000000C0000-0x00000000000D5000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-25 15:05
Reported
2024-03-25 15:07
Platform
win10v2004-20240319-en
Max time kernel
146s
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\usiuxfcn\ImagePath = "C:\\Windows\\SysWOW64\\usiuxfcn\\ziuakfbr.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\de4b82a7ffeafcc4720ea974858808fd.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\usiuxfcn\ziuakfbr.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4608 set thread context of 4936 | N/A | C:\Windows\SysWOW64\usiuxfcn\ziuakfbr.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\de4b82a7ffeafcc4720ea974858808fd.exe
"C:\Users\Admin\AppData\Local\Temp\de4b82a7ffeafcc4720ea974858808fd.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\usiuxfcn\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ziuakfbr.exe" C:\Windows\SysWOW64\usiuxfcn\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create usiuxfcn binPath= "C:\Windows\SysWOW64\usiuxfcn\ziuakfbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\de4b82a7ffeafcc4720ea974858808fd.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description usiuxfcn "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start usiuxfcn
C:\Windows\SysWOW64\usiuxfcn\ziuakfbr.exe
C:\Windows\SysWOW64\usiuxfcn\ziuakfbr.exe /d"C:\Users\Admin\AppData\Local\Temp\de4b82a7ffeafcc4720ea974858808fd.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
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1040 --field-trial-handle=2276,i,5672504106535478802,17394903851940863593,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 72.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.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 | 104.47.53.36:25 | microsoft-com.mail.protection.outlook.com | tcp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 133.250.112.20.in-addr.arpa | udp |
| US | 13.107.246.64:443 | tcp | |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta6.am0.yahoodns.net | udp |
| US | 98.136.96.75:25 | mta6.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| BE | 142.250.110.26:25 | smtp.google.com | tcp |
| US | 8.8.8.8:53 | 43.56.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | refabyd.info | udp |
| 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 | refabyd.info | udp |
| US | 8.8.8.8:53 | 207.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | refabyd.info | udp |
| US | 8.8.8.8:53 | refabyd.info | udp |
| US | 8.8.8.8:53 | refabyd.info | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 6.173.189.20.in-addr.arpa | udp |
Files
memory/3644-1-0x00000000005D0000-0x00000000006D0000-memory.dmp
memory/3644-2-0x00000000004F0000-0x0000000000503000-memory.dmp
memory/3644-3-0x0000000000400000-0x000000000046E000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\ziuakfbr.exe
| MD5 | f08a9951342f5405aef3495d71494081 |
| SHA1 | 80ca74618df12621d393e49da5082b9f054e5b0d |
| SHA256 | 334b712b6dc2157607eb44a7c97cb4ba46d16bcb8a51110995c930207e87d73d |
| SHA512 | 5eef7ed61e3c0870166a0def5f10e88cbe69ebdf7e41eba1557f399ae38b3c95ba4cf0b9f2050be9ff8dbb5f826878f84c9cc77b4551139e66826502974e40b3 |
C:\Windows\SysWOW64\usiuxfcn\ziuakfbr.exe
| MD5 | 5a66bc2084b6210e4bd1efb1eb1136f4 |
| SHA1 | 1a6250b455f06043ea680e0cd50805fcabc2aaff |
| SHA256 | ee1cce5b18d65851138dee09b02fb637cdd0f7fc6cd1d2059bf59da0e79aee23 |
| SHA512 | 6b18c0634affeff40d97be395806ff87f46558dd40334b2d69514b8dfc4c54f2e590a34e76488e5b51a7ea7d5f38559ef6ed0d31f5e8c5b8e6a524142cd98b38 |
memory/4608-8-0x0000000000770000-0x0000000000870000-memory.dmp
memory/4608-9-0x0000000000400000-0x000000000046E000-memory.dmp
memory/4936-10-0x0000000000F10000-0x0000000000F25000-memory.dmp
memory/4936-13-0x0000000000F10000-0x0000000000F25000-memory.dmp
memory/3644-14-0x0000000000400000-0x000000000046E000-memory.dmp
memory/4936-15-0x0000000000F10000-0x0000000000F25000-memory.dmp
memory/4936-16-0x0000000000F10000-0x0000000000F25000-memory.dmp
memory/4608-18-0x0000000000400000-0x000000000046E000-memory.dmp
memory/4608-22-0x00000000006D0000-0x00000000006E3000-memory.dmp
memory/3644-24-0x00000000005D0000-0x00000000006D0000-memory.dmp
memory/4936-26-0x0000000000F10000-0x0000000000F25000-memory.dmp