Analysis Overview
SHA256
c7fc7b8e258d4838544c2b70f292e37d1e9a9ad6ae74c8d8bd167d9d2392f636
Threat Level: Known bad
The file trx40.zip was found to be: Known bad.
Malicious Activity Summary
FatalRat
Fatalrat family
Fatal Rat payload
Enumerates connected drives
Program crash
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2025-02-24 10:11
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-24 10:11
Reported
2025-02-24 10:13
Platform
win7-20241010-en
Max time kernel
136s
Max time network
150s
Command Line
Signatures
FatalRat
Fatalrat family
Fatal Rat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Enumerates connected drives
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\package\MaskDoc.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe
"C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | hm.weilay.com.cn | udp |
| HK | 43.132.244.128:8081 | tcp | |
| US | 8.8.8.8:53 | hm.weilay.com.cn | udp |
| HK | 47.239.83.12:1527 | hm.weilay.com.cn | tcp |
| HK | 43.132.244.128:8081 | tcp | |
| HK | 43.132.244.128:8081 | tcp | |
| HK | 43.132.244.128:8081 | tcp | |
| HK | 43.132.244.128:8081 | tcp |
Files
memory/2220-1-0x0000000001DA0000-0x0000000001DDB000-memory.dmp
memory/2220-2-0x0000000001E80000-0x0000000001EB2000-memory.dmp
memory/2220-3-0x00000000003D0000-0x00000000003FA000-memory.dmp
memory/2220-8-0x0000000001DA0000-0x0000000001DDB000-memory.dmp
memory/2220-9-0x0000000001E80000-0x0000000001EB2000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-24 10:11
Reported
2025-02-24 10:13
Platform
win10v2004-20250217-en
Max time kernel
148s
Max time network
149s
Command Line
Signatures
FatalRat
Fatalrat family
Fatal Rat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Enumerates connected drives
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\package\MaskDoc.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe
"C:\Users\Admin\AppData\Local\Temp\package\MaskDoc.exe"
Network
| Country | Destination | Domain | Proto |
| US | 150.171.27.10:443 | tcp | |
| US | 150.171.27.10:443 | tcp | |
| US | 150.171.27.10:443 | tcp | |
| US | 8.8.8.8:53 | hm.weilay.com.cn | udp |
| US | 8.8.8.8:53 | hm.weilay.com.cn | udp |
| HK | 43.132.244.128:8081 | tcp | |
| HK | 47.239.83.12:1527 | hm.weilay.com.cn | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| HK | 43.132.244.128:8081 | tcp | |
| HK | 43.132.244.128:8081 | tcp | |
| HK | 43.132.244.128:8081 | tcp | |
| HK | 43.132.244.128:8081 | tcp |
Files
memory/4128-1-0x0000000002AD0000-0x0000000002B02000-memory.dmp
memory/4128-2-0x0000000002B10000-0x0000000002B4B000-memory.dmp
memory/4128-3-0x0000000000600000-0x000000000062A000-memory.dmp
memory/4128-8-0x0000000002AD0000-0x0000000002B02000-memory.dmp
memory/4128-9-0x0000000002B10000-0x0000000002B4B000-memory.dmp
Analysis: behavioral3
Detonation Overview
Submitted
2025-02-24 10:11
Reported
2025-02-24 10:13
Platform
win7-20240903-en
Max time kernel
118s
Max time network
119s
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\package\PotPlayer.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\package\PotPlayer.dll,#1
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2688 -s 352
Network
Files
Analysis: behavioral4
Detonation Overview
Submitted
2025-02-24 10:11
Reported
2025-02-24 10:13
Platform
win10v2004-20250217-en
Max time kernel
149s
Max time network
149s
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 1904 wrote to memory of 1704 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 1904 wrote to memory of 1704 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 1904 wrote to memory of 1704 | 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\package\PotPlayer.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\package\PotPlayer.dll,#1
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1704 -ip 1704
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1704 -s 896
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 | udp |