Analysis Overview
SHA256
befeb13d03669a0f610ba500df017d7b1c2155d86cc7e985feb439a867851fe0
Threat Level: Known bad
The file befeb13d03669a0f610ba500df017d7b1c2155d86cc7e985feb439a867851fe0 was found to be: Known bad.
Malicious Activity Summary
Windows security bypass
Tofsee
Creates new service(s)
Modifies Windows Firewall
Sets service image path in registry
Deletes itself
Executes dropped EXE
Checks computer location settings
Suspicious use of SetThreadContext
Launches sc.exe
Enumerates physical storage devices
Event Triggered Execution: Netsh Helper DLL
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-30 23:46
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-30 23:46
Reported
2024-08-30 23:49
Platform
win7-20240708-en
Max time kernel
144s
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\nrrtxfsc = "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\nrrtxfsc\ImagePath = "C:\\Windows\\SysWOW64\\nrrtxfsc\\kmhypjqj.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\nrrtxfsc\kmhypjqj.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2220 set thread context of 2312 | N/A | C:\Windows\SysWOW64\nrrtxfsc\kmhypjqj.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
Event Triggered Execution: Netsh Helper DLL
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key queried | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key value enumerated | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\nrrtxfsc\kmhypjqj.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\svchost.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\netsh.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nrrtxfsc\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kmhypjqj.exe" C:\Windows\SysWOW64\nrrtxfsc\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create nrrtxfsc binPath= "C:\Windows\SysWOW64\nrrtxfsc\kmhypjqj.exe /d\"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description nrrtxfsc "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start nrrtxfsc
C:\Windows\SysWOW64\nrrtxfsc\kmhypjqj.exe
C:\Windows\SysWOW64\nrrtxfsc\kmhypjqj.exe /d"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.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
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | microsoft.com | udp |
| AU | 20.70.246.20:80 | 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 |
| AU | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta7.am0.yahoodns.net | udp |
| US | 67.195.228.109:25 | mta7.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| NL | 172.217.218.26:25 | smtp.google.com | tcp |
| AU | 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 |
| AU | 43.231.4.7:443 | tcp |
Files
memory/2928-0-0x00000000002D0000-0x00000000002D1000-memory.dmp
memory/2928-1-0x00000000002E0000-0x00000000002E1000-memory.dmp
memory/2928-2-0x0000000000400000-0x000000000041F000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\kmhypjqj.exe
| MD5 | 299f8c5a27d001413e431e0a6bc57193 |
| SHA1 | d6b90ee4930e983ab980de73d7b982bd6cbef7db |
| SHA256 | 3abd9677f0376166310f1773cdacb69ba65b6e389659447aac2661676f45569e |
| SHA512 | c8b6712ef812bb981d97ade4e11e49ccf60276331d3567c1a3ee6a39eb59197ced6013cd8e205398c0e2c881e8aeb89907fc50b3702815e98104de509a5d98d2 |
memory/2312-7-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2312-10-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2312-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2220-12-0x0000000000400000-0x000000000041F000-memory.dmp
memory/2928-13-0x0000000000400000-0x000000000041F000-memory.dmp
memory/2312-14-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2312-15-0x0000000000080000-0x0000000000095000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-30 23:46
Reported
2024-08-30 23:49
Platform
win10v2004-20240802-en
Max time kernel
144s
Max time network
146s
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\dcdikdmc\ImagePath = "C:\\Windows\\SysWOW64\\dcdikdmc\\eqrlgcda.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.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\dcdikdmc\eqrlgcda.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1844 set thread context of 2536 | N/A | C:\Windows\SysWOW64\dcdikdmc\eqrlgcda.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
Event Triggered Execution: Netsh Helper DLL
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key queried | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key value enumerated | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh | C:\Windows\SysWOW64\netsh.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\dcdikdmc\eqrlgcda.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\sc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\netsh.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\svchost.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dcdikdmc\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eqrlgcda.exe" C:\Windows\SysWOW64\dcdikdmc\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create dcdikdmc binPath= "C:\Windows\SysWOW64\dcdikdmc\eqrlgcda.exe /d\"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description dcdikdmc "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start dcdikdmc
C:\Windows\SysWOW64\dcdikdmc\eqrlgcda.exe
C:\Windows\SysWOW64\dcdikdmc\eqrlgcda.exe /d"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.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
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 150.171.27.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 81.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 20.236.44.162:80 | 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 | 162.44.236.20.in-addr.arpa | udp |
| AU | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 228.249.119.40.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 | 67.195.204.73:25 | mta5.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| NL | 172.217.218.27:25 | smtp.google.com | tcp |
| AU | 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 |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 10.28.171.150.in-addr.arpa | udp |
| AU | 43.231.4.7:443 | tcp |
Files
memory/2064-0-0x0000000000B50000-0x0000000000B51000-memory.dmp
memory/2064-1-0x0000000000B60000-0x0000000000B61000-memory.dmp
memory/2064-2-0x0000000000400000-0x000000000041F000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\eqrlgcda.exe
| MD5 | 59a3c98025b464ac9ac9fd2824f5fba2 |
| SHA1 | 10bad430ca1f2a19bfcb34aab4bfa24acb749452 |
| SHA256 | 1f71961315c21f882ca23fb28dc2bca3db6b5e433c8d5808299982143a6dfd97 |
| SHA512 | f5d7f71ff65df0b3c738442e6c36c0db8032047ca983d22414e980f1f0c9f7247a7d243fa38c3a9d6b7381036095b71b4216ac316d2315bf6034cacd803354ed |
memory/1844-7-0x0000000000690000-0x0000000000691000-memory.dmp
memory/2536-8-0x0000000000AC0000-0x0000000000AD5000-memory.dmp
memory/1844-12-0x0000000000400000-0x000000000041F000-memory.dmp
memory/2536-11-0x0000000000AC0000-0x0000000000AD5000-memory.dmp
memory/2064-13-0x0000000000400000-0x000000000041F000-memory.dmp
memory/2536-14-0x0000000000AC0000-0x0000000000AD5000-memory.dmp
memory/2536-15-0x0000000000AC0000-0x0000000000AD5000-memory.dmp
memory/2536-16-0x0000000000AC0000-0x0000000000AD5000-memory.dmp