Analysis Overview
SHA256
3da981808b1a529f3e59f6c56e42809d38c4cfdd93d6c0efc5e1a80cac3d5d16
Threat Level: Known bad
The file c532dd750e39a5b79ecccdeb26e153f5 was found to be: Known bad.
Malicious Activity Summary
Tofsee
Windows security bypass
Sets service image path in registry
Creates new service(s)
Modifies Windows Firewall
Deletes itself
Executes dropped EXE
Checks computer location settings
Suspicious use of SetThreadContext
Launches sc.exe
Unsigned PE
Program crash
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-13 06:27
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-13 06:27
Reported
2024-03-13 06:30
Platform
win7-20240221-en
Max time kernel
154s
Max time network
153s
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\rzjyfmmh = "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\rzjyfmmh\ImagePath = "C:\\Windows\\SysWOW64\\rzjyfmmh\\rvcgilbn.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\rzjyfmmh\rvcgilbn.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2524 set thread context of 2956 | N/A | C:\Windows\SysWOW64\rzjyfmmh\rvcgilbn.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\c532dd750e39a5b79ecccdeb26e153f5.exe
"C:\Users\Admin\AppData\Local\Temp\c532dd750e39a5b79ecccdeb26e153f5.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rzjyfmmh\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rvcgilbn.exe" C:\Windows\SysWOW64\rzjyfmmh\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create rzjyfmmh binPath= "C:\Windows\SysWOW64\rzjyfmmh\rvcgilbn.exe /d\"C:\Users\Admin\AppData\Local\Temp\c532dd750e39a5b79ecccdeb26e153f5.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description rzjyfmmh "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start rzjyfmmh
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\rzjyfmmh\rvcgilbn.exe
C:\Windows\SysWOW64\rzjyfmmh\rvcgilbn.exe /d"C:\Users\Admin\AppData\Local\Temp\c532dd750e39a5b79ecccdeb26e153f5.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 | defeatwax.ru | udp |
| 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 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta6.am0.yahoodns.net | udp |
| US | 98.136.96.74:25 | mta6.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 74.125.193.26:25 | smtp.google.com | tcp |
| US | 8.8.8.8:53 | mail.ru | udp |
| US | 8.8.8.8:53 | mxs.mail.ru | udp |
| RU | 94.100.180.31:25 | mxs.mail.ru | tcp |
| US | 8.8.8.8:53 | refabyd.info | udp |
Files
memory/2832-1-0x00000000005E0000-0x00000000006E0000-memory.dmp
memory/2832-2-0x0000000000220000-0x0000000000233000-memory.dmp
memory/2832-3-0x0000000000400000-0x0000000000456000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\rvcgilbn.exe
| MD5 | 10562975ef046801809279f1a1782f81 |
| SHA1 | 5f2fe24fe5404f905efc761b05c376365214a839 |
| SHA256 | 84917ab750de078b23fe8bd326e932d570501e9aa93575a084e2490286d5f441 |
| SHA512 | 8524ef9cbc4f8e616177cd41fb1ca756fa95091c257b145dc197e9d0d4de505d2d1496b022b4653e70c29f54c027b5512e0026e850caf84b5068243b450960e5 |
memory/2832-6-0x0000000000400000-0x0000000000456000-memory.dmp
memory/2832-7-0x0000000000220000-0x0000000000233000-memory.dmp
C:\Windows\SysWOW64\rzjyfmmh\rvcgilbn.exe
| MD5 | 03a3e68696833b1bb1ae31b68527d6c6 |
| SHA1 | 80852941489fe4d208f952a1075327a0d782ca15 |
| SHA256 | 49106d9937c702db5b1893abc505dc3abf0f259b6a00e3916075ac2d6278b6fc |
| SHA512 | 249ac0c1d6177c060c06fe9f70dbc35bdaf7b7a49c08ae2411a569b8551e3634b55a62bf65d03c2cfbcd68639b2dcfcd5f91999fc048cfd9d0419d09e7887bd7 |
memory/2524-10-0x00000000004F0000-0x00000000005F0000-memory.dmp
memory/2956-12-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2956-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2956-15-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2524-11-0x0000000000400000-0x0000000000456000-memory.dmp
memory/2524-18-0x0000000000400000-0x0000000000456000-memory.dmp
memory/2956-20-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2956-21-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2956-22-0x0000000000080000-0x0000000000095000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-13 06:27
Reported
2024-03-13 06:30
Platform
win10v2004-20240226-en
Max time kernel
151s
Max time network
156s
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\oxfjjzkh\ImagePath = "C:\\Windows\\SysWOW64\\oxfjjzkh\\ycjnpsiu.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\c532dd750e39a5b79ecccdeb26e153f5.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\oxfjjzkh\ycjnpsiu.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3516 set thread context of 3420 | N/A | C:\Windows\SysWOW64\oxfjjzkh\ycjnpsiu.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
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\c532dd750e39a5b79ecccdeb26e153f5.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\oxfjjzkh\ycjnpsiu.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c532dd750e39a5b79ecccdeb26e153f5.exe
"C:\Users\Admin\AppData\Local\Temp\c532dd750e39a5b79ecccdeb26e153f5.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oxfjjzkh\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ycjnpsiu.exe" C:\Windows\SysWOW64\oxfjjzkh\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create oxfjjzkh binPath= "C:\Windows\SysWOW64\oxfjjzkh\ycjnpsiu.exe /d\"C:\Users\Admin\AppData\Local\Temp\c532dd750e39a5b79ecccdeb26e153f5.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description oxfjjzkh "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start oxfjjzkh
C:\Windows\SysWOW64\oxfjjzkh\ycjnpsiu.exe
C:\Windows\SysWOW64\oxfjjzkh\ycjnpsiu.exe /d"C:\Users\Admin\AppData\Local\Temp\c532dd750e39a5b79ecccdeb26e153f5.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\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4228 -ip 4228
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4228 -s 1248
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3516 -ip 3516
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3516 -s 548
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 194.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.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 | 52.101.40.26:25 | microsoft-com.mail.protection.outlook.com | tcp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.250.112.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 104.241.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 119.110.54.20.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 | 98.136.96.74:25 | mta5.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 64.134.221.88.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 |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | 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 |
| IE | 74.125.193.27:25 | smtp.google.com | tcp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | refabyd.info | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | 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 | refabyd.info | udp |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | refabyd.info | udp |
| US | 8.8.8.8:53 | 174.178.17.96.in-addr.arpa | 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 | 50.134.221.88.in-addr.arpa | 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 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 66.112.168.52.in-addr.arpa | udp |
| GB | 96.17.178.174:80 | tcp |
Files
memory/4228-1-0x0000000000780000-0x0000000000880000-memory.dmp
memory/4228-2-0x0000000000700000-0x0000000000713000-memory.dmp
memory/4228-3-0x0000000000400000-0x0000000000456000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\ycjnpsiu.exe
| MD5 | c1e109055fe096c74e4c863262438c34 |
| SHA1 | 51f7053d3c1c6e43541f53f1f2fa907151465939 |
| SHA256 | 704a56bf6f29e62c8a4b220c3473e4ea92c726a9978492f4be8d87a9212a0e92 |
| SHA512 | 9fa5453ef3e3985f05d0f3e9ff58e07c361e964888d313f1d5b18fffb70de3082d40a63981a5a2c9619f501bc7f7b2221ea433b24d9e38cc91aed9884986211b |
C:\Windows\SysWOW64\oxfjjzkh\ycjnpsiu.exe
| MD5 | f9413ec45a91c7d92a5304db9baffb71 |
| SHA1 | 476c14bf6da03d33327c6f933c78a6ebf237f347 |
| SHA256 | 7ca0dfada30bf58582aa9b727ecbe9db01a1092a00e4047b1a2e97e1c4ca0dda |
| SHA512 | 47dc2f9acdae08c7a9f4aaa3da0b2ad86dc5705c0f887c22086f7721e546c4438e9dbac32f1df7a55e7d8143ceedf16a4390241888b8130a6d9a65b5b1e09227 |
memory/4228-8-0x0000000000400000-0x0000000000456000-memory.dmp
memory/4228-9-0x0000000000700000-0x0000000000713000-memory.dmp
memory/3420-12-0x0000000000810000-0x0000000000825000-memory.dmp
memory/3516-11-0x0000000000400000-0x0000000000456000-memory.dmp
memory/3516-10-0x0000000000690000-0x0000000000790000-memory.dmp
memory/3420-15-0x0000000000810000-0x0000000000825000-memory.dmp
memory/3420-16-0x0000000000810000-0x0000000000825000-memory.dmp
memory/3516-17-0x0000000000400000-0x0000000000456000-memory.dmp
memory/3420-18-0x0000000000810000-0x0000000000825000-memory.dmp