Analysis Overview
SHA256
fbc03327661ed973c859257eb8ad4941108669c968de30a2ef77af775fe0e960
Threat Level: Known bad
The file de5f0b876145c3072389c0af52539a06 was found to be: Known bad.
Malicious Activity Summary
Windows security bypass
Tofsee
Sets service image path in registry
Modifies Windows Firewall
Creates new service(s)
Checks computer location settings
Executes dropped EXE
Deletes itself
Suspicious use of SetThreadContext
Launches sc.exe
Unsigned PE
Enumerates physical storage devices
Program crash
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-25 15:47
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-25 15:47
Reported
2024-03-25 15:49
Platform
win7-20240215-en
Max time kernel
149s
Max time network
150s
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\mfnklunj = "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\mfnklunj\ImagePath = "C:\\Windows\\SysWOW64\\mfnklunj\\veuijxms.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\mfnklunj\veuijxms.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2756 set thread context of 2464 | N/A | C:\Windows\SysWOW64\mfnklunj\veuijxms.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\de5f0b876145c3072389c0af52539a06.exe
"C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mfnklunj\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\veuijxms.exe" C:\Windows\SysWOW64\mfnklunj\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create mfnklunj binPath= "C:\Windows\SysWOW64\mfnklunj\veuijxms.exe /d\"C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description mfnklunj "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start mfnklunj
C:\Windows\SysWOW64\mfnklunj\veuijxms.exe
C:\Windows\SysWOW64\mfnklunj\veuijxms.exe /d"C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.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 | 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 | 104.47.53.36:25 | microsoft-com.mail.protection.outlook.com | tcp |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta7.am0.yahoodns.net | udp |
| US | 67.195.228.94:25 | 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 | 142.250.110.26:25 | smtp.google.com | tcp |
| 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 |
Files
memory/2328-3-0x0000000000220000-0x0000000000233000-memory.dmp
memory/2328-1-0x0000000002DD0000-0x0000000002ED0000-memory.dmp
memory/2328-4-0x0000000000400000-0x0000000002C68000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\veuijxms.exe
| MD5 | 9e47bbde4eb2bcd36749bd71b6cdb3fd |
| SHA1 | 49761226378ac20a28b6bc0db9677836226c2ea4 |
| SHA256 | 763f2ff2fc525efeaa5b12b3eb5d0ae50dcd3d040f59c8d0898b94cfb7bdad9f |
| SHA512 | ef0e1a4b817e1700f70997383176c22f43d8fe29f922e7b326a5ce6ff9e699099ee6ed19474b3557c8aec2b817a238e2147fb314937587bb9c14ad7b99263b55 |
C:\Windows\SysWOW64\mfnklunj\veuijxms.exe
| MD5 | 133f6ccff654ab3c26c8b1cc0d0d2fd8 |
| SHA1 | 9b65290ae3f5447511c76fa413a0de7381ba3869 |
| SHA256 | 11c2e9126ff4d05d9adf6d3ba62fc71b07bf21a234e1f2abfa1529b85495e6fc |
| SHA512 | 92fc259383d86a37a8c7100d06fd316ca6bacfdab2e3757a6bcb93047492b49c14adeae6ceacd85f5c1be088b057b4033910d20f4582a2e3e0ff32e6e439f262 |
memory/2328-8-0x0000000000400000-0x0000000002C68000-memory.dmp
memory/2464-12-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2464-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2464-9-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2756-14-0x0000000002D90000-0x0000000002E90000-memory.dmp
memory/2756-17-0x0000000000400000-0x0000000002C68000-memory.dmp
memory/2464-19-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2464-20-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2464-21-0x0000000000080000-0x0000000000095000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-25 15:47
Reported
2024-03-25 15:49
Platform
win10v2004-20240226-en
Max time kernel
150s
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\deroavu\ImagePath = "C:\\Windows\\SysWOW64\\deroavu\\jeorfqqy.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.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\deroavu\jeorfqqy.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4060 set thread context of 3264 | N/A | C:\Windows\SysWOW64\deroavu\jeorfqqy.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\de5f0b876145c3072389c0af52539a06.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\deroavu\jeorfqqy.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.exe
"C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\deroavu\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jeorfqqy.exe" C:\Windows\SysWOW64\deroavu\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create deroavu binPath= "C:\Windows\SysWOW64\deroavu\jeorfqqy.exe /d\"C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description deroavu "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start deroavu
C:\Windows\SysWOW64\deroavu\jeorfqqy.exe
C:\Windows\SysWOW64\deroavu\jeorfqqy.exe /d"C:\Users\Admin\AppData\Local\Temp\de5f0b876145c3072389c0af52539a06.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 456 -p 1656 -ip 1656
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1656 -s 1292
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4060 -ip 4060
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4060 -s 544
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 185.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 45.19.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 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 | 104.47.54.36:25 | microsoft-com.mail.protection.outlook.com | tcp |
| US | 8.8.8.8:53 | 50.23.12.20.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 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 195.177.78.104.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 | 67.195.204.72:25 | mta5.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 173.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 64.134.221.88.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 |
| BE | 142.250.110.27:25 | smtp.google.com | tcp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 189.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | 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 | 203.178.17.96.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 | 29.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | refabyd.info | 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 | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 211.178.17.96.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 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
Files
memory/1656-1-0x0000000002D90000-0x0000000002E90000-memory.dmp
memory/1656-2-0x00000000049B0000-0x00000000049C3000-memory.dmp
memory/1656-4-0x0000000000400000-0x0000000002C68000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\jeorfqqy.exe
| MD5 | ba0f71e13281a5ccc970321bffc92113 |
| SHA1 | 8e1e294a319ae8073ced26632f18f8bc00fb5d51 |
| SHA256 | b42f8f1fa25b94dbf738ef1b63dea163af5c29c0cd4b9f791ee887eeced69344 |
| SHA512 | 436d83a28668e9c692221994c706905af0bd4866c555f5fcb203681b0e0d0c872958544aacad76e650609ee10080c846a121185462ab301f51dfe39fe40b9737 |
C:\Windows\SysWOW64\deroavu\jeorfqqy.exe
| MD5 | 26160d8483a6609e372812a558198e0a |
| SHA1 | 0b5ebfdce274f72a8e6043b354d7dcae903aec21 |
| SHA256 | bd31765268b24c5717361c31462551cfab82a0e9d1ff400afdef5acee824263c |
| SHA512 | 9fdcedc7a5b8c734a559e21ac43b91ed09ceb93a28b39ce6f6ecc22f124d921103510dc0b0a8e573aeb45f834c73f645d239a94e34dcccb08f1488a7d19ac434 |
memory/1656-9-0x00000000049B0000-0x00000000049C3000-memory.dmp
memory/1656-8-0x0000000000400000-0x0000000002C68000-memory.dmp
memory/4060-10-0x0000000002F00000-0x0000000003000000-memory.dmp
memory/3264-11-0x0000000000510000-0x0000000000525000-memory.dmp
memory/4060-14-0x0000000000400000-0x0000000002C68000-memory.dmp
memory/3264-16-0x0000000000510000-0x0000000000525000-memory.dmp
memory/3264-17-0x0000000000510000-0x0000000000525000-memory.dmp
memory/4060-18-0x0000000000400000-0x0000000002C68000-memory.dmp
memory/3264-19-0x0000000000510000-0x0000000000525000-memory.dmp