Analysis Overview
SHA256
77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b
Threat Level: Known bad
The file 77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll was found to be: Known bad.
Malicious Activity Summary
Detects Grandoreiro payload
Grandoreiro family
Grandoreiro
Program crash
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-08 16:50
Signatures
Detects Grandoreiro payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Grandoreiro family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-08 16:50
Reported
2024-11-08 16:53
Platform
win7-20241010-en
Max time kernel
122s
Max time network
130s
Command Line
Signatures
Detects Grandoreiro payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Grandoreiro
Grandoreiro family
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 2872 wrote to memory of 2848 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 2872 wrote to memory of 2848 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 2872 wrote to memory of 2848 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 2872 wrote to memory of 2848 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 2872 wrote to memory of 2848 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 2872 wrote to memory of 2848 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 2872 wrote to memory of 2848 | 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\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1
Network
Files
memory/2848-0-0x0000000001FA0000-0x0000000003E5D000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-08 16:50
Reported
2024-11-08 16:52
Platform
win10v2004-20241007-en
Max time kernel
93s
Max time network
138s
Command Line
Signatures
Detects Grandoreiro payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Grandoreiro
Grandoreiro family
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 900 wrote to memory of 4736 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 900 wrote to memory of 4736 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 900 wrote to memory of 4736 | 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\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4736 -ip 4736
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4736 -s 748
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.210.23.2.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 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.163.245.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 107.209.201.84.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
Files
memory/4736-0-0x00000000023F0000-0x00000000042AD000-memory.dmp