Analysis Overview
SHA256
932cb9cc50f478211994f9fff6e753e1ea56877326db099350b8f59b6c236d04
Threat Level: Known bad
The file AsyncClient.exe was found to be: Known bad.
Malicious Activity Summary
Asyncrat family
AsyncRat
Async RAT payload
Async RAT payload
Checks computer location settings
Enumerates physical storage devices
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Delays execution with timeout.exe
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Uses Task Scheduler COM API
Uses Volume Shadow Copy WMI provider
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
Enumerates system info in registry
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-22 16:46
Signatures
Async RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Asyncrat family
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-22 16:46
Reported
2023-03-22 16:47
Platform
win10v2004-20230220-en
Max time kernel
22s
Max time network
38s
Command Line
Signatures
AsyncRat
Async RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | 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:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\timeout.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\BIOS | C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily | C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU | C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000_Classes\Local Settings | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000_Classes\Local Settings | C:\Windows\system32\OpenWith.exe | N/A |
Suspicious behavior: AddClipboardFormatListener
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE | N/A |
| N/A | N/A | C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Uses Volume Shadow Copy WMI provider
Processes
C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "exe" /tr '"C:\Users\Admin\AppData\Roaming\exe"' & exit
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8225.tmp.bat""
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "exe" /tr '"C:\Users\Admin\AppData\Roaming\exe"'
C:\Windows\SysWOW64\timeout.exe
timeout 3
C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Desktop\InstallMerge.odt"
C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\Desktop\ConvertToGet.vbs"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.154.139.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 24.32.109.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 76.38.195.152.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.116.69.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 33.18.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 52.152.110.14:443 | tcp |
Files
memory/1332-133-0x00000000002F0000-0x0000000000302000-memory.dmp
memory/1332-134-0x0000000004D70000-0x0000000004D80000-memory.dmp
memory/1332-135-0x0000000004F80000-0x0000000004FE6000-memory.dmp
memory/1332-136-0x00000000053D0000-0x000000000546C000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp8225.tmp.bat
| MD5 | be84c818afec1a028f95ccbfde17363f |
| SHA1 | 03d39afe8f53d6eb4953d5c7c2bbbcadf8094617 |
| SHA256 | aec087cc4b1c3528756bf078d4be5905ae1cb45c90119be872fb6914500d53e2 |
| SHA512 | 04bcfc1bd8a88da5e37352235769ce37c48b7eac442bd90550e044d87b81892b8661eec3a85a9a3bd880ddc4d191e8b13fde0f15247414bbdc8d4192a912e170 |
memory/3964-142-0x00007FFD24B50000-0x00007FFD24B60000-memory.dmp
memory/3964-143-0x00007FFD24B50000-0x00007FFD24B60000-memory.dmp
memory/3964-144-0x00007FFD24B50000-0x00007FFD24B60000-memory.dmp
memory/3964-145-0x00007FFD24B50000-0x00007FFD24B60000-memory.dmp
memory/3964-146-0x00007FFD24B50000-0x00007FFD24B60000-memory.dmp
C:\Users\Admin\AppData\Roaming\exe
| MD5 | cd56336140a135c2262054ee149c1550 |
| SHA1 | 8cae4cf270f01d89829c124f8a8883c0844d5443 |
| SHA256 | 932cb9cc50f478211994f9fff6e753e1ea56877326db099350b8f59b6c236d04 |
| SHA512 | 785280be15d4bd25245f74c2b5b770e6936655911626d4ed7895ac4ab943c2149e204d5b190c5a6308d2c0fb6075151120f16ecf46e0fa89cd7616b16ac5ba85 |
memory/3964-148-0x00007FFD22680000-0x00007FFD22690000-memory.dmp
memory/3964-149-0x00007FFD22680000-0x00007FFD22690000-memory.dmp
memory/3964-172-0x00007FFD24B50000-0x00007FFD24B60000-memory.dmp
memory/3964-173-0x00007FFD24B50000-0x00007FFD24B60000-memory.dmp
memory/3964-174-0x00007FFD24B50000-0x00007FFD24B60000-memory.dmp
memory/3964-175-0x00007FFD24B50000-0x00007FFD24B60000-memory.dmp