Analysis Overview
SHA256
c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b
Threat Level: Likely malicious
The file c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b was found to be: Likely malicious.
Malicious Activity Summary
Identifies VirtualBox via ACPI registry values (likely anti-VM)
Executes dropped EXE
Checks BIOS information in registry
Writes to the Master Boot Record (MBR)
Checks whether UAC is enabled
Suspicious use of NtSetInformationThreadHideFromDebugger
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-06-12 11:44
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-12 11:44
Reported
2024-06-12 11:46
Platform
win7-20240611-en
Max time kernel
146s
Max time network
118s
Command Line
Signatures
Identifies VirtualBox via ACPI registry values (likely anti-VM)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ | F:\yvchost.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion | F:\yvchost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion | F:\yvchost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | F:\yvchost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | F:\yvchost.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | F:\yvchost.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| File opened for modification | \??\PhysicalDrive0 | F:\yvchost.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| N/A | N/A | F:\yvchost.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| N/A | N/A | F:\yvchost.exe | N/A |
| N/A | N/A | F:\yvchost.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2488 wrote to memory of 2660 | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | F:\yvchost.exe |
| PID 2488 wrote to memory of 2660 | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | F:\yvchost.exe |
| PID 2488 wrote to memory of 2660 | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | F:\yvchost.exe |
| PID 2488 wrote to memory of 2660 | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | F:\yvchost.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe
"C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe"
F:\yvchost.exe
F:\yvchost.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | ip.cn | udp |
| US | 104.21.64.12:443 | ip.cn | tcp |
Files
memory/2488-0-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2488-1-0x0000000077900000-0x0000000077902000-memory.dmp
memory/2488-3-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2488-4-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2488-5-0x0000000000400000-0x0000000000E1F000-memory.dmp
F:\yvchost.exe
| MD5 | fe1346c94d38693912f3c7f294b866e3 |
| SHA1 | 174e68efebb94aae6a463a8e7e85dbd77c3e085f |
| SHA256 | c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b |
| SHA512 | bfc7c39490e9c9287701d61e6617199c181cc582f437c263fac95338231998023c715e02266e6f3afd39fea093f5ac51a37d8e3e16db220a8cf480e9f40e4ef4 |
memory/2488-12-0x0000000003330000-0x0000000003D4F000-memory.dmp
memory/2660-13-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2488-14-0x0000000003330000-0x0000000003D4F000-memory.dmp
C:\ProgramData\mntemp
| MD5 | 5adc4b666885a0e9b05906fd55c216c5 |
| SHA1 | a189b4ff16062241912f571b14d7ef5d3df7a42a |
| SHA256 | a12fdcbc4446ed61726ad5c03f72312ff6cb9d27a5ed324f538d66236963d81f |
| SHA512 | 35435a93b2bded1692551ff97154943c5a283eec8ae125f0e4c15dd282a038ea90fe706efc6bbfa7818c4a65154314020b9604d3ad756efe405718ed40f76f64 |
memory/2660-18-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2660-16-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2660-17-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2488-20-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2660-21-0x0000000000400000-0x0000000000E1F000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-12 11:44
Reported
2024-06-12 11:46
Platform
win10v2004-20240611-en
Max time kernel
148s
Max time network
125s
Command Line
Signatures
Identifies VirtualBox via ACPI registry values (likely anti-VM)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ | F:\yvchost.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion | F:\yvchost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion | F:\yvchost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | F:\yvchost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | F:\yvchost.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | F:\yvchost.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| File opened for modification | \??\PhysicalDrive0 | F:\yvchost.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| N/A | N/A | F:\yvchost.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | N/A |
| N/A | N/A | F:\yvchost.exe | N/A |
| N/A | N/A | F:\yvchost.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4080 wrote to memory of 2328 | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | F:\yvchost.exe |
| PID 4080 wrote to memory of 2328 | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | F:\yvchost.exe |
| PID 4080 wrote to memory of 2328 | N/A | C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe | F:\yvchost.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe
"C:\Users\Admin\AppData\Local\Temp\c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b.exe"
F:\yvchost.exe
F:\yvchost.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| NL | 23.62.61.185:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 185.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | ip.cn | udp |
| US | 172.67.174.23:443 | ip.cn | tcp |
| US | 8.8.8.8:53 | 23.174.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 30.243.111.52.in-addr.arpa | udp |
Files
memory/4080-1-0x0000000077174000-0x0000000077176000-memory.dmp
memory/4080-0-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/4080-3-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/4080-4-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/4080-5-0x0000000000400000-0x0000000000E1F000-memory.dmp
F:\yvchost.exe
| MD5 | fe1346c94d38693912f3c7f294b866e3 |
| SHA1 | 174e68efebb94aae6a463a8e7e85dbd77c3e085f |
| SHA256 | c074458d1518d60a2dcfa6cfa575dfd7f58cfe31934cd92b1095c4529964433b |
| SHA512 | bfc7c39490e9c9287701d61e6617199c181cc582f437c263fac95338231998023c715e02266e6f3afd39fea093f5ac51a37d8e3e16db220a8cf480e9f40e4ef4 |
C:\ProgramData\mntemp
| MD5 | 5adc4b666885a0e9b05906fd55c216c5 |
| SHA1 | a189b4ff16062241912f571b14d7ef5d3df7a42a |
| SHA256 | a12fdcbc4446ed61726ad5c03f72312ff6cb9d27a5ed324f538d66236963d81f |
| SHA512 | 35435a93b2bded1692551ff97154943c5a283eec8ae125f0e4c15dd282a038ea90fe706efc6bbfa7818c4a65154314020b9604d3ad756efe405718ed40f76f64 |
memory/2328-13-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2328-12-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2328-11-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/4080-15-0x0000000000400000-0x0000000000E1F000-memory.dmp
memory/2328-16-0x0000000000400000-0x0000000000E1F000-memory.dmp