Analysis Overview
SHA256
e4754f6bf9dab9b5c124d1d1b1238ddbfa1383e593f686f55a9eb747d44a938f
Threat Level: Known bad
The file AsyncClient.exe was found to be: Known bad.
Malicious Activity Summary
Modifies Windows Defender Real-time Protection settings
AsyncRat
Async RAT payload
Asyncrat family
Async RAT payload
Windows security modification
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-04-27 03:34
Signatures
Async RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Asyncrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-04-27 03:34
Reported
2023-04-27 03:37
Platform
win10v2004-20230220-en
Max time kernel
135s
Max time network
154s
Command Line
Signatures
AsyncRat
Modifies Windows Defender Real-time Protection settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1" | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1" | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1" | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
Async RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Windows security modification
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0" | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1760 wrote to memory of 5080 | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe |
| PID 1760 wrote to memory of 5080 | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe |
| PID 1760 wrote to memory of 5080 | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 108.211.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 32.18.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| N/A | 127.0.0.1:61288 | tcp | |
| US | 146.70.165.10:61288 | tcp | |
| US | 8.8.8.8:53 | 10.165.70.146.in-addr.arpa | udp |
| US | 13.89.179.9:443 | tcp | |
| US | 146.70.165.10:61288 | tcp | |
| US | 52.152.110.14:443 | tcp | |
| NL | 8.238.20.126:80 | tcp | |
| US | 146.70.165.10:61288 | tcp | |
| NL | 173.223.113.164:443 | tcp | |
| NL | 173.223.113.131:80 | tcp | |
| US | 204.79.197.203:80 | api.msn.com | tcp |
| US | 52.152.110.14:443 | tcp | |
| US | 8.8.8.8:53 | 64.13.109.52.in-addr.arpa | udp |
| NL | 8.238.177.126:80 | tcp | |
| US | 146.70.165.10:61288 | tcp | |
| US | 52.152.110.14:443 | tcp | |
| US | 146.70.165.10:61288 | tcp | |
| US | 52.152.110.14:443 | tcp | |
| US | 52.152.110.14:443 | tcp | |
| US | 52.152.110.14:443 | tcp |
Files
memory/1760-133-0x0000000000A40000-0x0000000000A52000-memory.dmp
memory/1760-134-0x0000000005430000-0x0000000005440000-memory.dmp
memory/1760-135-0x0000000005430000-0x0000000005440000-memory.dmp
memory/1760-136-0x0000000005960000-0x00000000059FC000-memory.dmp
memory/1760-137-0x0000000005FB0000-0x0000000006554000-memory.dmp
memory/1760-138-0x0000000005A70000-0x0000000005AD6000-memory.dmp
memory/1760-139-0x0000000006BE0000-0x0000000006C56000-memory.dmp
memory/1760-140-0x0000000006BB0000-0x0000000006BCE000-memory.dmp
memory/1760-141-0x0000000006D30000-0x0000000006DC2000-memory.dmp
memory/5080-142-0x0000000002AF0000-0x0000000002B26000-memory.dmp
memory/5080-143-0x0000000005520000-0x0000000005B48000-memory.dmp
memory/5080-144-0x0000000005CA0000-0x0000000005CC2000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mdsr1ged.dpc.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/5080-150-0x0000000005D40000-0x0000000005DA6000-memory.dmp
memory/5080-155-0x0000000002B90000-0x0000000002BA0000-memory.dmp
memory/5080-156-0x0000000002B90000-0x0000000002BA0000-memory.dmp
memory/5080-157-0x0000000006420000-0x000000000643E000-memory.dmp
memory/5080-158-0x0000000002B90000-0x0000000002BA0000-memory.dmp
memory/5080-159-0x000000007F590000-0x000000007F5A0000-memory.dmp
memory/5080-160-0x00000000069E0000-0x0000000006A12000-memory.dmp
memory/5080-161-0x0000000070150000-0x000000007019C000-memory.dmp
memory/5080-171-0x00000000069C0000-0x00000000069DE000-memory.dmp
memory/5080-172-0x0000000007D70000-0x00000000083EA000-memory.dmp
memory/5080-173-0x0000000007720000-0x000000000773A000-memory.dmp
memory/5080-174-0x0000000007790000-0x000000000779A000-memory.dmp
memory/5080-175-0x00000000079A0000-0x0000000007A36000-memory.dmp
memory/5080-176-0x0000000007960000-0x000000000796E000-memory.dmp
memory/5080-177-0x0000000007A60000-0x0000000007A7A000-memory.dmp
memory/5080-178-0x0000000007A50000-0x0000000007A58000-memory.dmp