Analysis Overview
SHA256
81d2be1565c05f77e829e1296d17d9456ae672459e4283315cdd0dfae01626a9
Threat Level: Known bad
The file 81d2be1565c05f77e829e1296d17d9456ae672459e4283315cdd0dfae01626a9 was found to be: Known bad.
Malicious Activity Summary
PlugX
Detects PlugX payload
Checks computer location settings
Executes dropped EXE
Unexpected DNS network traffic destination
Loads dropped DLL
Unsigned PE
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: GetForegroundWindowSpam
Checks processor information in registry
Modifies registry class
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-04-10 12:15
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-10 12:15
Reported
2024-04-10 12:18
Platform
win7-20240221-en
Max time kernel
150s
Max time network
150s
Command Line
Signatures
Detects PlugX payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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PlugX
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\wsc_proxy.exe | N/A |
| N/A | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| N/A | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| N/A | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
Unexpected DNS network traffic destination
| Description | Indicator | Process | Target |
| Destination IP | 103.43.18.220 | N/A | N/A |
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CENTRALPROCESSOR\0\~MHZ | C:\Windows\SysWOW64\svchost.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\SYSTEM\CENTRALPROCESSOR\0 | C:\Windows\SysWOW64\svchost.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\CLASSES\FAST | C:\Windows\SysWOW64\svchost.exe | N/A |
| Set value (data) | \REGISTRY\MACHINE\SOFTWARE\Classes\FAST\CLSID = 31003700370031003900450045004500380035004200430036003000310039000000 | C:\Windows\SysWOW64\svchost.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\msiexec.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\wsc_proxy.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\wsc_proxy.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\msiexec.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\Windows\SysWOW64\msiexec.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\81d2be1565c05f77e829e1296d17d9456ae672459e4283315cdd0dfae01626a9.exe
"C:\Users\Admin\AppData\Local\Temp\81d2be1565c05f77e829e1296d17d9456ae672459e4283315cdd0dfae01626a9.exe"
C:\wsc_proxy.exe
"C:\wsc_proxy.exe"
C:\ProgramData\Avast Software\Avast\wsc_proxy.exe
"C:\ProgramData\Avast Software\Avast\wsc_proxy.exe" 100 2392
C:\ProgramData\Avast Software\Avast\wsc_proxy.exe
"C:\ProgramData\Avast Software\Avast\wsc_proxy.exe" 200 0
C:\Windows\SysWOW64\svchost.exe
C:\Windows\system32\svchost.exe 201 0
C:\Windows\SysWOW64\msiexec.exe
C:\Windows\system32\msiexec.exe 209 2168
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | tools.daji8.me | udp |
| N/A | 10.127.255.255:53 | udp | |
| HK | 103.43.18.220:53 | tools.daji8.me | udp |
Files
C:\wsc_proxy.exe
| MD5 | c2902be3472adb3014c2bd07f4d4d034 |
| SHA1 | bfc6c0eda00da8537fa94b8dead9fd7b2b2436b7 |
| SHA256 | 1948bb0df11f768d6dd30ae7ecec5550db7c817d09cb31b5e2cee9b86a4047da |
| SHA512 | 2ac83a1dd89c6028eab125ca98d078c4df18291eec4054211297a6b6968470c5066fca8469e489ac8295f63298cbe40d30f369300b004c69e0c7e62f3b693b54 |
C:\wsc.dll
| MD5 | a3be5ee9a505a2fc1260521d150cbb19 |
| SHA1 | 710617c387500735b8aa44ba7ff001fa43a2a16f |
| SHA256 | c664a816771b8d058796bdddbc0554510c430cc7fc98bae5153a21b1797bf39c |
| SHA512 | ea0cda4e543a4838cd9ac258a91b471c6e5ee266b5ef1cca3bb341ab4a8131dcb632ca570c449e6b0aa5cd7e5d59d229e5078965c5f4f7cee1a79cc003f3da0c |
memory/2392-19-0x0000000000450000-0x0000000000550000-memory.dmp
C:\wsc_proxy.dat
| MD5 | 07a9a4b7068d7a4406a00656a762ca55 |
| SHA1 | 981ef9b7f98b949d16a3b4e6eefe2575dcf784e1 |
| SHA256 | e48af8d3a597b947d145e8a2e8e94eff003a5eb8544918955f65ac5af37cd331 |
| SHA512 | ae8c7f5a5c7354a1800c47ca7c124982a354fbe2b2a520f6f8a1968d924ff66dd45e5dbe6f2e4048ee53cc21a25b83ff4639b5d4d35918bd48dd4dc140fd7b4e |
memory/2392-20-0x00000000002B0000-0x00000000002E5000-memory.dmp
memory/2392-34-0x00000000002B0000-0x00000000002E5000-memory.dmp
memory/2076-40-0x0000000000420000-0x0000000000455000-memory.dmp
memory/2076-41-0x0000000000420000-0x0000000000455000-memory.dmp
memory/2780-45-0x00000000003A0000-0x00000000003D5000-memory.dmp
memory/2168-47-0x0000000000080000-0x0000000000081000-memory.dmp
memory/2168-51-0x00000000000F0000-0x0000000000114000-memory.dmp
memory/2168-52-0x00000000000A0000-0x00000000000A2000-memory.dmp
memory/2168-54-0x0000000000080000-0x0000000000081000-memory.dmp
memory/2168-55-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2168-57-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2168-56-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2780-59-0x00000000003A0000-0x00000000003D5000-memory.dmp
memory/2168-69-0x0000000000080000-0x0000000000081000-memory.dmp
memory/2168-70-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2168-71-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2168-72-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2168-74-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2168-75-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2168-76-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2168-77-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2168-79-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/2076-80-0x0000000000420000-0x0000000000455000-memory.dmp
memory/472-87-0x00000000008C0000-0x00000000008F5000-memory.dmp
memory/472-88-0x0000000000070000-0x0000000000071000-memory.dmp
memory/472-89-0x00000000008C0000-0x00000000008F5000-memory.dmp
memory/472-91-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/472-90-0x00000000008C0000-0x00000000008F5000-memory.dmp
memory/472-92-0x00000000008C0000-0x00000000008F5000-memory.dmp
memory/2168-94-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/472-95-0x00000000001F0000-0x0000000000225000-memory.dmp
memory/472-96-0x00000000008C0000-0x00000000008F5000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-10 12:15
Reported
2024-04-10 12:18
Platform
win10v2004-20240226-en
Max time kernel
150s
Max time network
155s
Command Line
Signatures
Detects PlugX payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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PlugX
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\81d2be1565c05f77e829e1296d17d9456ae672459e4283315cdd0dfae01626a9.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\wsc_proxy.exe | N/A |
| N/A | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| N/A | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\wsc_proxy.exe | N/A |
| N/A | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| N/A | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
Unexpected DNS network traffic destination
| Description | Indicator | Process | Target |
| Destination IP | 103.43.18.220 | N/A | N/A |
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\SYSTEM\CENTRALPROCESSOR\0 | C:\Windows\SysWOW64\svchost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHZ | C:\Windows\SysWOW64\svchost.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\CLASSES\FAST | C:\Windows\SysWOW64\svchost.exe | N/A |
| Set value (data) | \REGISTRY\MACHINE\SOFTWARE\Classes\FAST\CLSID = 34003600370037004400310045004300390044003800370041003000460034000000 | C:\Windows\SysWOW64\svchost.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\msiexec.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\wsc_proxy.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\wsc_proxy.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\ProgramData\Avast Software\Avast\wsc_proxy.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\msiexec.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\Windows\SysWOW64\msiexec.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\81d2be1565c05f77e829e1296d17d9456ae672459e4283315cdd0dfae01626a9.exe
"C:\Users\Admin\AppData\Local\Temp\81d2be1565c05f77e829e1296d17d9456ae672459e4283315cdd0dfae01626a9.exe"
C:\wsc_proxy.exe
"C:\wsc_proxy.exe"
C:\ProgramData\Avast Software\Avast\wsc_proxy.exe
"C:\ProgramData\Avast Software\Avast\wsc_proxy.exe" 100 4468
C:\ProgramData\Avast Software\Avast\wsc_proxy.exe
"C:\ProgramData\Avast Software\Avast\wsc_proxy.exe" 200 0
C:\Windows\SysWOW64\svchost.exe
C:\Windows\system32\svchost.exe 201 0
C:\Windows\SysWOW64\msiexec.exe
C:\Windows\system32\msiexec.exe 209 4656
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tools.daji8.me | udp |
| N/A | 10.127.255.255:53 | udp | |
| HK | 103.43.18.220:53 | tools.daji8.me | udp |
| US | 8.8.8.8:53 | 220.18.43.103.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.14.97.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 30.73.42.20.in-addr.arpa | udp |
Files
C:\wsc_proxy.exe
| MD5 | c2902be3472adb3014c2bd07f4d4d034 |
| SHA1 | bfc6c0eda00da8537fa94b8dead9fd7b2b2436b7 |
| SHA256 | 1948bb0df11f768d6dd30ae7ecec5550db7c817d09cb31b5e2cee9b86a4047da |
| SHA512 | 2ac83a1dd89c6028eab125ca98d078c4df18291eec4054211297a6b6968470c5066fca8469e489ac8295f63298cbe40d30f369300b004c69e0c7e62f3b693b54 |
C:\wsc.dll
| MD5 | a3be5ee9a505a2fc1260521d150cbb19 |
| SHA1 | 710617c387500735b8aa44ba7ff001fa43a2a16f |
| SHA256 | c664a816771b8d058796bdddbc0554510c430cc7fc98bae5153a21b1797bf39c |
| SHA512 | ea0cda4e543a4838cd9ac258a91b471c6e5ee266b5ef1cca3bb341ab4a8131dcb632ca570c449e6b0aa5cd7e5d59d229e5078965c5f4f7cee1a79cc003f3da0c |
memory/4468-19-0x00000000028E0000-0x00000000029E0000-memory.dmp
C:\wsc_proxy.dat
| MD5 | 07a9a4b7068d7a4406a00656a762ca55 |
| SHA1 | 981ef9b7f98b949d16a3b4e6eefe2575dcf784e1 |
| SHA256 | e48af8d3a597b947d145e8a2e8e94eff003a5eb8544918955f65ac5af37cd331 |
| SHA512 | ae8c7f5a5c7354a1800c47ca7c124982a354fbe2b2a520f6f8a1968d924ff66dd45e5dbe6f2e4048ee53cc21a25b83ff4639b5d4d35918bd48dd4dc140fd7b4e |
memory/4468-20-0x0000000000FC0000-0x0000000000FF5000-memory.dmp
memory/4468-21-0x0000000000FC0000-0x0000000000FF5000-memory.dmp
memory/2960-41-0x0000000000B50000-0x0000000000B85000-memory.dmp
memory/4472-46-0x0000000000E90000-0x0000000000EC5000-memory.dmp
memory/4656-48-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-47-0x0000000000880000-0x0000000000881000-memory.dmp
memory/4472-49-0x0000000000E90000-0x0000000000EC5000-memory.dmp
memory/4656-50-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-62-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-61-0x0000000000880000-0x0000000000881000-memory.dmp
memory/4656-63-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-64-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-65-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-66-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-67-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-68-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-69-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/4656-71-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/2960-72-0x0000000000B50000-0x0000000000B85000-memory.dmp
memory/1436-74-0x00000000013B0000-0x00000000013E5000-memory.dmp
memory/1436-73-0x0000000000DB0000-0x0000000000DB1000-memory.dmp
memory/1436-75-0x0000000001170000-0x0000000001171000-memory.dmp
memory/1436-76-0x00000000013B0000-0x00000000013E5000-memory.dmp
memory/1436-77-0x00000000013B0000-0x00000000013E5000-memory.dmp
memory/1436-78-0x00000000013B0000-0x00000000013E5000-memory.dmp
memory/4656-80-0x0000000000AC0000-0x0000000000AF5000-memory.dmp
memory/1436-81-0x00000000013B0000-0x00000000013E5000-memory.dmp