Analysis Overview
SHA256
8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31
Threat Level: Known bad
The file 8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31.exe was found to be: Known bad.
Malicious Activity Summary
Guloader,Cloudeye
Guloader family
Loads dropped DLL
Program crash
Unsigned PE
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2025-01-11 04:16
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-01-11 04:16
Reported
2025-01-11 04:18
Platform
win7-20240903-en
Max time kernel
117s
Max time network
117s
Command Line
Signatures
Guloader family
Guloader,Cloudeye
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31.exe | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31.exe
"C:\Users\Admin\AppData\Local\Temp\8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\nsdD930.tmp\System.dll
| MD5 | 6e55a6e7c3fdbd244042eb15cb1ec739 |
| SHA1 | 070ea80e2192abc42f358d47b276990b5fa285a9 |
| SHA256 | acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506 |
| SHA512 | 2d504b74da38edc967e3859733a2a9cacd885db82f0ca69bfb66872e882707314c54238344d45945dc98bae85772aceef71a741787922d640627d3c8ae8f1c35 |
memory/2460-9-0x0000000003960000-0x000000000503A000-memory.dmp
memory/2460-10-0x0000000003960000-0x000000000503A000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-01-11 04:16
Reported
2025-01-11 04:18
Platform
win10v2004-20241007-en
Max time kernel
148s
Max time network
150s
Command Line
Signatures
Guloader family
Guloader,Cloudeye
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31.exe | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31.exe
"C:\Users\Admin\AppData\Local\Temp\8c4c1550cb63a4c8abebb1ef8a7601953c6c1f0d02f1080f1fb7adc306b99c31.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 30.243.111.52.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\nswB017.tmp\System.dll
| MD5 | 6e55a6e7c3fdbd244042eb15cb1ec739 |
| SHA1 | 070ea80e2192abc42f358d47b276990b5fa285a9 |
| SHA256 | acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506 |
| SHA512 | 2d504b74da38edc967e3859733a2a9cacd885db82f0ca69bfb66872e882707314c54238344d45945dc98bae85772aceef71a741787922d640627d3c8ae8f1c35 |
memory/664-8-0x0000000004560000-0x0000000005C3A000-memory.dmp
memory/664-9-0x0000000004560000-0x0000000005C3A000-memory.dmp
Analysis: behavioral3
Detonation Overview
Submitted
2025-01-11 04:16
Reported
2025-01-11 04:18
Platform
win7-20240903-en
Max time kernel
121s
Max time network
122s
Command Line
Signatures
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\rundll32.exe |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2328 -s 220
Network
Files
Analysis: behavioral4
Detonation Overview
Submitted
2025-01-11 04:16
Reported
2025-01-11 04:18
Platform
win10v2004-20241007-en
Max time kernel
149s
Max time network
150s
Command Line
Signatures
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\rundll32.exe |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4080 wrote to memory of 4336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 4080 wrote to memory of 4336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 4080 wrote to memory of 4336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4336 -ip 4336
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4336 -s 612
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.238.56.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 106.27.33.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 120.150.79.40.in-addr.arpa | udp |