Analysis Overview
SHA256
fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7
Threat Level: Known bad
The file fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7 was found to be: Known bad.
Malicious Activity Summary
R77 family
r77 rootkit payload
Suspicious use of NtCreateProcessExOtherParentProcess
Drops file in Windows directory
Program crash
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Enumerates system info in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-02-15 04:25
Signatures
R77 family
r77 rootkit payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2022-02-15 04:25
Reported
2022-02-15 04:28
Platform
win7-en-20211208
Max time kernel
142s
Max time network
133s
Command Line
Signatures
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe
"C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe"
Network
Files
memory/1668-55-0x000007FEF5933000-0x000007FEF5934000-memory.dmp
memory/1668-56-0x00000000025C2000-0x00000000025C4000-memory.dmp
memory/1668-57-0x0000000000140000-0x000000000017E000-memory.dmp
memory/1668-58-0x00000000025C4000-0x00000000025C6000-memory.dmp
memory/1668-59-0x00000000025C6000-0x00000000025C7000-memory.dmp
memory/1668-60-0x00000000025C7000-0x00000000025C8000-memory.dmp
memory/1668-61-0x00000000025CC000-0x00000000025EB000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-02-15 04:25
Reported
2022-02-15 04:28
Platform
win10v2004-en-20220113
Max time kernel
139s
Max time network
143s
Command Line
Signatures
Suspicious use of NtCreateProcessExOtherParentProcess
| Description | Indicator | Process | Target |
| PID 4012 created 1036 | N/A | C:\Windows\system32\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe |
| PID 1128 created 1036 | N/A | C:\Windows\system32\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\DataStore.edb | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\ReportingEvents.log | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\Logs\CBS\CBS.log | C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe | N/A |
| File opened for modification | C:\Windows\WinSxS\pending.xml | C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe | N/A |
| File opened for modification | C:\Windows\WindowsUpdate.log | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk | C:\Windows\system32\svchost.exe | N/A |
Program crash
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 | C:\Windows\system32\WerFault.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Windows\system32\WerFault.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\system32\WerFault.exe | N/A |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 | C:\Windows\system32\WerFault.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Windows\system32\WerFault.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\system32\WerFault.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\BIOS | C:\Windows\system32\WerFault.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU | C:\Windows\system32\WerFault.exe | N/A |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\BIOS | C:\Windows\system32\WerFault.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU | C:\Windows\system32\WerFault.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\system32\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\system32\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\system32\WerFault.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4012 wrote to memory of 1036 | N/A | C:\Windows\system32\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe |
| PID 4012 wrote to memory of 1036 | N/A | C:\Windows\system32\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe |
| PID 1128 wrote to memory of 1036 | N/A | C:\Windows\system32\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe |
| PID 1128 wrote to memory of 1036 | N/A | C:\Windows\system32\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe
"C:\Users\Admin\AppData\Local\Temp\fe366d465529880c7acc45f37268f9013172008ff3b5903c3aecfc90b08a80a7.exe"
C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 428 -p 1036 -ip 1036
C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 1036 -s 1172
C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 560 -p 1036 -ip 1036
C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 1036 -s 1188
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
Network
| Country | Destination | Domain | Proto |
| US | 13.107.4.50:80 | tcp | |
| US | 13.107.4.50:80 | tcp |
Files
memory/1036-130-0x00007FFCDD9A3000-0x00007FFCDD9A5000-memory.dmp
memory/1036-131-0x000001C2F5740000-0x000001C2F5742000-memory.dmp
memory/1036-132-0x000001C2F5743000-0x000001C2F5745000-memory.dmp
memory/1036-133-0x000001C2F5746000-0x000001C2F5747000-memory.dmp
memory/1036-134-0x000001C2F5747000-0x000001C2F5748000-memory.dmp
memory/1036-135-0x000001C2F5748000-0x000001C2F574A000-memory.dmp
memory/4612-136-0x000001FADB170000-0x000001FADB180000-memory.dmp
memory/4612-137-0x000001FADB720000-0x000001FADB730000-memory.dmp
memory/4612-138-0x000001FADDDF0000-0x000001FADDDF4000-memory.dmp