Analysis Overview
SHA256
53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8e
Threat Level: Likely malicious
The file 53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN was found to be: Likely malicious.
Malicious Activity Summary
Sets file to hidden
Checks computer location settings
Deletes itself
Executes dropped EXE
Indicator Removal: File Deletion
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
Views/modifies file attributes
Suspicious use of AdjustPrivilegeToken
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-13 05:20
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-13 05:20
Reported
2024-11-13 05:22
Platform
win10v2004-20241007-en
Max time kernel
111s
Max time network
96s
Command Line
Signatures
Sets file to hidden
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\attrib.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Debug\yyghost.exe | N/A |
Indicator Removal: File Deletion
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\Debug\yyghost.exe | C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe | N/A |
| File opened for modification | C:\Windows\Debug\yyghost.exe | C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe | N/A |
| File opened for modification | C:\Windows\Debug\yyghost.exe | C:\Windows\SysWOW64\attrib.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:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\Debug\yyghost.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\attrib.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\Debug\yyghost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Windows\Debug\yyghost.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe | N/A |
Suspicious use of WriteProcessMemory
Views/modifies file attributes
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\attrib.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe
"C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe"
C:\Windows\SysWOW64\attrib.exe
attrib +a +s +h +r C:\Windows\Debug\yyghost.exe
C:\Windows\Debug\yyghost.exe
C:\Windows\Debug\yyghost.exe
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\53E76F~1.EXE > nul
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 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.baidu.com | udp |
| HK | 103.235.46.96:80 | www.baidu.com | tcp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 72.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 96.46.235.103.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.163.245.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 83.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | oVHuK1pL.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 31.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | OCMSoVx4P.nnnn.eu.org | udp |
Files
memory/2228-0-0x0000000000400000-0x0000000000410000-memory.dmp
C:\Windows\debug\yyghost.exe
| MD5 | cfcf4e21b23db6164c304ae9e0b165ef |
| SHA1 | 27bff054e873cec4ae407518ceaf3f2ba02e8620 |
| SHA256 | f69716706a505ceeb9a8ec552bf5925e170503fcbea57f70ab908fcc00f8cba5 |
| SHA512 | c5abb16abf28015bd91dab9691d5f19208e63503e01a6cb388df2d3629c4802701b84b7fb204aa7e96b6df449b96bcb0a2b528edc5b0e8d8e8f049b8c20806f7 |
memory/2228-5-0x0000000000400000-0x0000000000410000-memory.dmp
memory/2452-6-0x0000000000400000-0x0000000000410000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-13 05:20
Reported
2024-11-13 05:22
Platform
win7-20240708-en
Max time kernel
118s
Max time network
118s
Command Line
Signatures
Sets file to hidden
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\attrib.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Debug\ayahost.exe | N/A |
Indicator Removal: File Deletion
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\Debug\ayahost.exe | C:\Windows\SysWOW64\attrib.exe | N/A |
| File created | C:\Windows\Debug\ayahost.exe | C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe | N/A |
| File opened for modification | C:\Windows\Debug\ayahost.exe | C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.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\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\attrib.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\Debug\ayahost.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\Debug\ayahost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Windows\Debug\ayahost.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe | N/A |
Suspicious use of WriteProcessMemory
Views/modifies file attributes
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\attrib.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe
"C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe"
C:\Windows\SysWOW64\attrib.exe
attrib +a +s +h +r C:\Windows\Debug\ayahost.exe
C:\Windows\Debug\ayahost.exe
C:\Windows\Debug\ayahost.exe
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\53E76F~1.EXE > nul
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | www.baidu.com | udp |
| HK | 103.235.46.96:80 | www.baidu.com | tcp |
| US | 8.8.8.8:53 | inRYhcGDV.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | Iz8jy96Oxj.nnnn.eu.org | udp |
Files
memory/1452-0-0x0000000000400000-0x0000000000410000-memory.dmp
C:\Windows\Debug\ayahost.exe
| MD5 | a8b90df1b65397d9df8eca8eb77558f6 |
| SHA1 | 80b1466aeabbd24d7f235b4d943c9b71e6c70748 |
| SHA256 | 2b7d5a953d8f541c1250d5f5185f025ee274a2936035a93d500f7535dd4bc37f |
| SHA512 | 419b16c42a7650b9f9d37da47f0283a6848a0c25060c7b4244e4b5061ed15062c020a3b71c4bed4d319fb17c98320bede8567b02ec3c7dc9ee32447c5d2a5162 |
memory/2352-5-0x0000000000400000-0x0000000000410000-memory.dmp
memory/1452-6-0x0000000000400000-0x0000000000410000-memory.dmp
memory/2352-7-0x0000000000400000-0x0000000000410000-memory.dmp