Analysis Overview
SHA256
86a41d419fb7833463a06e7e6774617b8db86c1d41259def41e61a396370b164
Threat Level: Known bad
The file c50606fc4ff46ed15174748afa93aea0 was found to be: Known bad.
Malicious Activity Summary
Windows security bypass
Tofsee
Modifies Windows Firewall
Creates new service(s)
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
Program crash
Unsigned PE
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-13 04:53
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-13 04:53
Reported
2024-03-13 04:56
Platform
win7-20240220-en
Max time kernel
149s
Max time network
138s
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\chhtpbfz = "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\chhtpbfz\ImagePath = "C:\\Windows\\SysWOW64\\chhtpbfz\\nytpoouh.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\chhtpbfz\nytpoouh.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2748 set thread context of 1868 | N/A | C:\Windows\SysWOW64\chhtpbfz\nytpoouh.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\c50606fc4ff46ed15174748afa93aea0.exe
"C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\chhtpbfz\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nytpoouh.exe" C:\Windows\SysWOW64\chhtpbfz\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create chhtpbfz binPath= "C:\Windows\SysWOW64\chhtpbfz\nytpoouh.exe /d\"C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description chhtpbfz "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start chhtpbfz
C:\Windows\SysWOW64\chhtpbfz\nytpoouh.exe
C:\Windows\SysWOW64\chhtpbfz\nytpoouh.exe /d"C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.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 | 52.101.42.0:25 | microsoft-com.mail.protection.outlook.com | tcp |
| RU | 176.111.174.19:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta6.am0.yahoodns.net | udp |
| US | 67.195.228.111:25 | mta6.am0.yahoodns.net | tcp |
| RU | 176.111.174.19:443 | tcp | |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 172.253.116.26:25 | smtp.google.com | tcp |
| US | 8.8.8.8:53 | mail.ru | udp |
| US | 8.8.8.8:53 | mxs.mail.ru | udp |
| RU | 217.69.139.150:25 | mxs.mail.ru | tcp |
| RU | 176.111.174.19:443 | tcp | |
| RU | 176.111.174.19:443 | tcp | |
| RU | 176.111.174.19:443 | tcp |
Files
memory/2784-1-0x0000000000230000-0x0000000000330000-memory.dmp
memory/2784-2-0x00000000003A0000-0x00000000003B3000-memory.dmp
memory/2784-4-0x0000000000400000-0x000000000099D000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\nytpoouh.exe
| MD5 | 057261a7c06dfc488944a4ed55968ba0 |
| SHA1 | 0f19baa309297cf1082b0bc588b9b7789278c105 |
| SHA256 | 940315fa0a29616e84158d6abad9ccb362f5661a0bc8597edef0d52c7cf3b16c |
| SHA512 | 30233e41190779140fc2e57bea520b57b76efaffba85cb768950bda4f7c5571b4dd9f9fc3bf3e5215fe5dec44b5978660f72dce5dd4c8e5055b504ee76a06539 |
C:\Windows\SysWOW64\chhtpbfz\nytpoouh.exe
| MD5 | 95691e2643d6e9d07f52d7618373ae34 |
| SHA1 | 5f23f1dbb39852363213ddd382bf0f74a97b4293 |
| SHA256 | e9022e29771bbe7e8234d77265ce0f0e31ee8a5ed2a4d5eb835401c4ac2fa6f0 |
| SHA512 | 00ccb2e28b13177ca8604a3320941e808935c71baa590d9daf0950a9016de80724fc4ab897eb7bd30bff4e43558e5e0b86e0c512a748a153e02df90e72eee50a |
memory/2784-8-0x0000000000400000-0x000000000099D000-memory.dmp
memory/2784-9-0x00000000003A0000-0x00000000003B3000-memory.dmp
memory/1868-13-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/1868-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1868-10-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/2748-15-0x0000000000A70000-0x0000000000B70000-memory.dmp
memory/2748-18-0x0000000000400000-0x000000000099D000-memory.dmp
memory/1868-19-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/1868-20-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/1868-21-0x00000000000D0000-0x00000000000E5000-memory.dmp
memory/1868-22-0x00000000000D0000-0x00000000000E5000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-13 04:53
Reported
2024-03-13 04:56
Platform
win10v2004-20240226-en
Max time kernel
149s
Max time network
145s
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\jwuyehcc\ImagePath = "C:\\Windows\\SysWOW64\\jwuyehcc\\urkzaldq.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.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\jwuyehcc\urkzaldq.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3920 set thread context of 4520 | N/A | C:\Windows\SysWOW64\jwuyehcc\urkzaldq.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\c50606fc4ff46ed15174748afa93aea0.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\jwuyehcc\urkzaldq.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.exe
"C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jwuyehcc\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\urkzaldq.exe" C:\Windows\SysWOW64\jwuyehcc\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create jwuyehcc binPath= "C:\Windows\SysWOW64\jwuyehcc\urkzaldq.exe /d\"C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description jwuyehcc "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start jwuyehcc
C:\Windows\SysWOW64\jwuyehcc\urkzaldq.exe
C:\Windows\SysWOW64\jwuyehcc\urkzaldq.exe /d"C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.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 448 -p 180 -ip 180
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 180 -s 1040
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3920 -ip 3920
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3920 -s 520
Network
| Country | Destination | Domain | Proto |
| 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 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.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 | 133.250.112.20.in-addr.arpa | udp |
| RU | 176.111.174.19:443 | tcp | |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta7.am0.yahoodns.net | udp |
| US | 67.195.204.74:25 | mta7.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 | 217.135.221.88.in-addr.arpa | udp |
| RU | 176.111.174.19:443 | tcp | |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 172.253.116.27:25 | smtp.google.com | tcp |
| US | 8.8.8.8:53 | 88.156.103.20.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 |
| RU | 176.111.174.19:443 | tcp | |
| 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 | 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 |
| RU | 176.111.174.19:443 | tcp | |
| RU | 176.111.174.19:443 | tcp |
Files
memory/180-1-0x0000000000B60000-0x0000000000C60000-memory.dmp
memory/180-2-0x0000000000B40000-0x0000000000B53000-memory.dmp
memory/180-4-0x0000000000400000-0x000000000099D000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\urkzaldq.exe
| MD5 | d78cf181e7da03ea8343c5c02aa3537f |
| SHA1 | b3b15677c18bda10f19fdf143754c302b9d62133 |
| SHA256 | 6338a4442565e2ecd477fbc557d98e9f0b7e401719f9de9d0400def4966dc351 |
| SHA512 | a0870703416b035a8dabc49f53ebdfd1fcf73a15874c797fa641ef170ee3a291cd1ece2d332a4aa7e01c62a8d838b1b92835b98187f14d87899a8ee924b9d2d2 |
C:\Windows\SysWOW64\jwuyehcc\urkzaldq.exe
| MD5 | 28202127a15c40f3062f2e2c6c9fb59c |
| SHA1 | fe32bb2d2a489c6751c1edd2c39a8165eaf18916 |
| SHA256 | 751419385a0ee626ee544f25774dddd2259ab4841ecf2961c25aaba83d5d3793 |
| SHA512 | a11d245973b831c550bd9f03ebf22e455ef6c7018a8abde0c0a2c48bab0e9fb3b025feb6075cf63e857da0923824ecee2518442ce12a9e505fa2a0e407ed6b0d |
memory/180-9-0x0000000000B40000-0x0000000000B53000-memory.dmp
memory/180-8-0x0000000000400000-0x000000000099D000-memory.dmp
memory/3920-10-0x0000000000CC0000-0x0000000000DC0000-memory.dmp
memory/3920-11-0x0000000000400000-0x000000000099D000-memory.dmp
memory/4520-12-0x0000000000CE0000-0x0000000000CF5000-memory.dmp
memory/4520-15-0x0000000000CE0000-0x0000000000CF5000-memory.dmp
memory/4520-17-0x0000000000CE0000-0x0000000000CF5000-memory.dmp
memory/3920-18-0x0000000000400000-0x000000000099D000-memory.dmp
memory/4520-19-0x0000000000CE0000-0x0000000000CF5000-memory.dmp