Analysis Overview
SHA256
789e9198d141f39bf030563420328dab4477ac3d60cc87244c6aac684f0aac5e
Threat Level: Known bad
The file b253f5b8d1f9aad76587136d065831e2 was found to be: Known bad.
Malicious Activity Summary
Windows security bypass
Tofsee
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
2024-03-04 14:11
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-04 14:11
Reported
2024-03-04 14:13
Platform
win7-20240221-en
Max time kernel
150s
Max time network
124s
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\rlmbqkh = "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\rlmbqkh\ImagePath = "C:\\Windows\\SysWOW64\\rlmbqkh\\kjxznkld.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\rlmbqkh\kjxznkld.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2564 set thread context of 2416 | N/A | C:\Windows\SysWOW64\rlmbqkh\kjxznkld.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\b253f5b8d1f9aad76587136d065831e2.exe
"C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rlmbqkh\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kjxznkld.exe" C:\Windows\SysWOW64\rlmbqkh\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create rlmbqkh binPath= "C:\Windows\SysWOW64\rlmbqkh\kjxznkld.exe /d\"C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description rlmbqkh "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start rlmbqkh
C:\Windows\SysWOW64\rlmbqkh\kjxznkld.exe
C:\Windows\SysWOW64\rlmbqkh\kjxznkld.exe /d"C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.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 | 52.101.40.26:25 | 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 | 67.195.204.77:25 | mta5.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 74.125.193.26:25 | 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/1964-1-0x0000000000CA0000-0x0000000000DA0000-memory.dmp
memory/1964-3-0x00000000002B0000-0x00000000002C3000-memory.dmp
memory/1964-4-0x0000000000400000-0x0000000000C1F000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\kjxznkld.exe
| MD5 | 6bc9cea76db6ad0504fbf8cf259cf247 |
| SHA1 | 9840bb4ddcd9a253a4140181f41ca3d83c4e73af |
| SHA256 | 1a457a45c5f54eab9800ae26489e76d92ae8235abaa66c9bd0f7bbb6a26fd066 |
| SHA512 | 92a747e42aa47af44f1a2fe75b38587f8b54a73aa47125a66c58d848a1e1f89c3c19d9e2be689ce0753b30f3c011ea6c8625c10e2f3d1452f4f94ca91b944f43 |
memory/1964-7-0x0000000000400000-0x0000000000C1F000-memory.dmp
memory/2564-9-0x00000000002F0000-0x00000000003F0000-memory.dmp
memory/2564-10-0x0000000000400000-0x0000000000C1F000-memory.dmp
memory/2416-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2416-11-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2416-14-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2564-16-0x0000000000400000-0x0000000000C1F000-memory.dmp
memory/2416-19-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2416-20-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2416-21-0x0000000000080000-0x0000000000095000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-04 14:11
Reported
2024-03-04 14:13
Platform
win10v2004-20240226-en
Max time kernel
146s
Max time network
127s
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\uvcbvgzm\ImagePath = "C:\\Windows\\SysWOW64\\uvcbvgzm\\miaaxmlz.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.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\uvcbvgzm\miaaxmlz.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3308 set thread context of 3916 | N/A | C:\Windows\SysWOW64\uvcbvgzm\miaaxmlz.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\b253f5b8d1f9aad76587136d065831e2.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\uvcbvgzm\miaaxmlz.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.exe
"C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uvcbvgzm\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\miaaxmlz.exe" C:\Windows\SysWOW64\uvcbvgzm\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create uvcbvgzm binPath= "C:\Windows\SysWOW64\uvcbvgzm\miaaxmlz.exe /d\"C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description uvcbvgzm "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start uvcbvgzm
C:\Windows\SysWOW64\uvcbvgzm\miaaxmlz.exe
C:\Windows\SysWOW64\uvcbvgzm\miaaxmlz.exe /d"C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.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 488 -p 5076 -ip 5076
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5076 -s 1244
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3308 -ip 3308
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3308 -s 516
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 73.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 188.178.17.96.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 | 133.250.112.20.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 | 67.195.204.79:25 | mta5.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | 81.171.91.138.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 74.125.193.27:25 | smtp.google.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 150.191.110.104.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 | 79.121.231.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 181.178.17.96.in-addr.arpa | udp |
| HK | 43.231.4.7:443 | tcp |
Files
memory/5076-1-0x0000000000D60000-0x0000000000E60000-memory.dmp
memory/5076-2-0x0000000000D40000-0x0000000000D53000-memory.dmp
memory/5076-4-0x0000000000400000-0x0000000000C1F000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\miaaxmlz.exe
| MD5 | bbbab794e10313a6e8fdd4a7079cf889 |
| SHA1 | 07313b2742adb8b372883762c1014a08f57aae12 |
| SHA256 | b6e5728748a87de415fc315d59f59db3eab5b5027286a342c7528558765495f9 |
| SHA512 | f9f214c1efd2fc1b9bf38ed034f2dc65f066dc355d587e16cfd71db0f931837a808973a13d87163dafd65c6312efef555bdbd6e478a3727553f4cd14591974f0 |
memory/5076-8-0x0000000000D40000-0x0000000000D53000-memory.dmp
memory/5076-7-0x0000000000400000-0x0000000000C1F000-memory.dmp
memory/3916-11-0x00000000010E0000-0x00000000010F5000-memory.dmp
memory/3308-13-0x0000000000400000-0x0000000000C1F000-memory.dmp
memory/3308-10-0x0000000000E10000-0x0000000000F10000-memory.dmp
memory/3916-15-0x00000000010E0000-0x00000000010F5000-memory.dmp
memory/3916-16-0x00000000010E0000-0x00000000010F5000-memory.dmp
memory/3916-18-0x00000000010E0000-0x00000000010F5000-memory.dmp