Analysis Overview
SHA256
f8b2c110a680ee0fad4fc129351ad835fb959bc6ad5c99aa707aec7887affee9
Threat Level: Known bad
The file f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118 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
Checks computer location settings
Deletes itself
Executes dropped EXE
Suspicious use of SetThreadContext
Launches sc.exe
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-16 00:47
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-16 00:47
Reported
2024-04-16 00:49
Platform
win7-20240221-en
Max time kernel
147s
Max time network
119s
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\fefcxjns = "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\fefcxjns\ImagePath = "C:\\Windows\\SysWOW64\\fefcxjns\\cuiwkjzt.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\fefcxjns\cuiwkjzt.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2632 set thread context of 2404 | N/A | C:\Windows\SysWOW64\fefcxjns\cuiwkjzt.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\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fefcxjns\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cuiwkjzt.exe" C:\Windows\SysWOW64\fefcxjns\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create fefcxjns binPath= "C:\Windows\SysWOW64\fefcxjns\cuiwkjzt.exe /d\"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description fefcxjns "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start fefcxjns
C:\Windows\SysWOW64\fefcxjns\cuiwkjzt.exe
C:\Windows\SysWOW64\fefcxjns\cuiwkjzt.exe /d"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.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 |
| HK | 43.231.4.6:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta7.am0.yahoodns.net | udp |
| US | 67.195.228.111:25 | 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 | 74.125.128.26:25 | smtp.google.com | tcp |
| HK | 43.231.4.6:443 | 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 |
| HK | 43.231.4.6:443 | tcp |
Files
memory/2184-1-0x0000000000A20000-0x0000000000B20000-memory.dmp
memory/2184-2-0x0000000000220000-0x0000000000233000-memory.dmp
memory/2184-4-0x0000000000400000-0x00000000008EE000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\cuiwkjzt.exe
| MD5 | 9b0ea4b6ef89bbfeadfd57e4b2e89ea5 |
| SHA1 | 9757661bb6728d1ca8da7398886a404c63f38fc6 |
| SHA256 | 8a3ddf5939647c2065714523cea3f1807a825152520d6e128d00e6717cca785a |
| SHA512 | 9427b53206c70a83f93adf458bc1c025b0bf4daec3b18d740f31dfcf53c87e73a84338955b4f5f78d4fecb2935ab90de0d51f7ce02312b428e4790a7f79e4d52 |
memory/2184-7-0x0000000000400000-0x00000000008EE000-memory.dmp
memory/2184-8-0x0000000000220000-0x0000000000233000-memory.dmp
memory/2632-10-0x0000000000A50000-0x0000000000B50000-memory.dmp
memory/2632-12-0x0000000000400000-0x00000000008EE000-memory.dmp
memory/2404-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2404-15-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2632-17-0x0000000000400000-0x00000000008EE000-memory.dmp
memory/2404-11-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2404-19-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2404-21-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2404-20-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2404-22-0x00000000000C0000-0x00000000000D5000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-16 00:47
Reported
2024-04-16 00:50
Platform
win10v2004-20240412-en
Max time kernel
148s
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\grmbbxyb\ImagePath = "C:\\Windows\\SysWOW64\\grmbbxyb\\vzgqerzp.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.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\grmbbxyb\vzgqerzp.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2280 set thread context of 4084 | N/A | C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.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\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\grmbbxyb\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vzgqerzp.exe" C:\Windows\SysWOW64\grmbbxyb\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create grmbbxyb binPath= "C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.exe /d\"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description grmbbxyb "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start grmbbxyb
C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.exe
C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.exe /d"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.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 | 17.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.114.53.23.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 | 133.250.112.20.in-addr.arpa | udp |
| HK | 43.231.4.6:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta6.am0.yahoodns.net | udp |
| US | 98.136.96.76:25 | mta6.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.14.97.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| NL | 74.125.128.26:25 | smtp.google.com | tcp |
| HK | 43.231.4.6:443 | 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 | 22.236.111.52.in-addr.arpa | udp |
| HK | 43.231.4.6:443 | tcp |
Files
memory/4796-1-0x0000000000AE0000-0x0000000000BE0000-memory.dmp
memory/4796-2-0x0000000000A90000-0x0000000000AA3000-memory.dmp
memory/4796-4-0x0000000000400000-0x00000000008EE000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\vzgqerzp.exe
| MD5 | 35089220ecd1f34b808f856a091f1c13 |
| SHA1 | b2c200c81f9e9987238d1c867dbff34f0af35101 |
| SHA256 | fff16312237bdb87a36a151ee4ce6b8cdb28f28afaf4a9210d8cddacb14a8cf0 |
| SHA512 | 81c13d6add678575cefee378335e4e694377f8c8712297433ca09e88cdad9af99805bb394a1a3a8e511ae0f75b63a1a7261a6dbf36ccb2a7088c69e1778a15ae |
memory/4796-7-0x0000000000400000-0x00000000008EE000-memory.dmp
memory/4796-8-0x0000000000A90000-0x0000000000AA3000-memory.dmp
memory/4084-10-0x0000000000F00000-0x0000000000F15000-memory.dmp
memory/2280-11-0x0000000000AC0000-0x0000000000BC0000-memory.dmp
memory/2280-13-0x0000000000400000-0x00000000008EE000-memory.dmp
memory/2280-14-0x0000000000400000-0x00000000008EE000-memory.dmp
memory/4084-17-0x0000000000F00000-0x0000000000F15000-memory.dmp
memory/4084-18-0x0000000000F00000-0x0000000000F15000-memory.dmp
memory/4084-19-0x0000000000F00000-0x0000000000F15000-memory.dmp