asyncrat | 15b5aace17bef2063e42f5956f066ee601b2dc15a657e9b3aaefb9588a7b83d7

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	file.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	svchost.exe

Looks for VMWare Tools registry key 2 TTPs 2 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	file.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	svchost.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	file.exe

Executes dropped EXE 1 IoCs

pid	Process
3824	svchost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	file.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	file.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	file.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3824 set thread context of 460	3824	svchost.exe	114

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

pid	Process
4212	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
740	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3984	file.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe
3824	svchost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3984	file.exe
Token: SeDebugPrivilege	3824	svchost.exe
Token: SeDebugPrivilege	460	jsc.exe
Token: SeDebugPrivilege	460	jsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
460	jsc.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3984 wrote to memory of 4936	3984	file.exe	80
PID 3984 wrote to memory of 4936	3984	file.exe	80
PID 3984 wrote to memory of 4712	3984	file.exe	82
PID 3984 wrote to memory of 4712	3984	file.exe	82
PID 4936 wrote to memory of 4212	4936	cmd.exe	84
PID 4936 wrote to memory of 4212	4936	cmd.exe	84
PID 4712 wrote to memory of 740	4712	cmd.exe	85
PID 4712 wrote to memory of 740	4712	cmd.exe	85
PID 4712 wrote to memory of 3824	4712	cmd.exe	86
PID 4712 wrote to memory of 3824	4712	cmd.exe	86
PID 3824 wrote to memory of 2500	3824	svchost.exe	87
PID 3824 wrote to memory of 2500	3824	svchost.exe	87
PID 3824 wrote to memory of 4508	3824	svchost.exe	88
PID 3824 wrote to memory of 4508	3824	svchost.exe	88
PID 3824 wrote to memory of 2844	3824	svchost.exe	89
PID 3824 wrote to memory of 2844	3824	svchost.exe	89
PID 3824 wrote to memory of 4416	3824	svchost.exe	90
PID 3824 wrote to memory of 4416	3824	svchost.exe	90
PID 3824 wrote to memory of 4424	3824	svchost.exe	91
PID 3824 wrote to memory of 4424	3824	svchost.exe	91
PID 3824 wrote to memory of 4536	3824	svchost.exe	92
PID 3824 wrote to memory of 4536	3824	svchost.exe	92
PID 3824 wrote to memory of 1880	3824	svchost.exe	93
PID 3824 wrote to memory of 1880	3824	svchost.exe	93
PID 3824 wrote to memory of 5088	3824	svchost.exe	94
PID 3824 wrote to memory of 5088	3824	svchost.exe	94
PID 3824 wrote to memory of 4412	3824	svchost.exe	95
PID 3824 wrote to memory of 4412	3824	svchost.exe	95
PID 3824 wrote to memory of 4132	3824	svchost.exe	96
PID 3824 wrote to memory of 4132	3824	svchost.exe	96
PID 3824 wrote to memory of 4808	3824	svchost.exe	97
PID 3824 wrote to memory of 4808	3824	svchost.exe	97
PID 3824 wrote to memory of 4568	3824	svchost.exe	98
PID 3824 wrote to memory of 4568	3824	svchost.exe	98
PID 3824 wrote to memory of 3084	3824	svchost.exe	99
PID 3824 wrote to memory of 3084	3824	svchost.exe	99
PID 3824 wrote to memory of 4688	3824	svchost.exe	100
PID 3824 wrote to memory of 4688	3824	svchost.exe	100
PID 3824 wrote to memory of 4372	3824	svchost.exe	101
PID 3824 wrote to memory of 4372	3824	svchost.exe	101
PID 3824 wrote to memory of 4572	3824	svchost.exe	102
PID 3824 wrote to memory of 4572	3824	svchost.exe	102
PID 3824 wrote to memory of 4572	3824	svchost.exe	102
PID 3824 wrote to memory of 388	3824	svchost.exe	103
PID 3824 wrote to memory of 388	3824	svchost.exe	103
PID 3824 wrote to memory of 4620	3824	svchost.exe	104
PID 3824 wrote to memory of 4620	3824	svchost.exe	104
PID 3824 wrote to memory of 4604	3824	svchost.exe	105
PID 3824 wrote to memory of 4604	3824	svchost.exe	105
PID 3824 wrote to memory of 5084	3824	svchost.exe	106
PID 3824 wrote to memory of 5084	3824	svchost.exe	106
PID 3824 wrote to memory of 3436	3824	svchost.exe	107
PID 3824 wrote to memory of 3436	3824	svchost.exe	107
PID 3824 wrote to memory of 1620	3824	svchost.exe	108
PID 3824 wrote to memory of 1620	3824	svchost.exe	108
PID 3824 wrote to memory of 1312	3824	svchost.exe	109
PID 3824 wrote to memory of 1312	3824	svchost.exe	109
PID 3824 wrote to memory of 1240	3824	svchost.exe	110
PID 3824 wrote to memory of 1240	3824	svchost.exe	110
PID 3824 wrote to memory of 624	3824	svchost.exe	111
PID 3824 wrote to memory of 624	3824	svchost.exe	111
PID 3824 wrote to memory of 4228	3824	svchost.exe	112
PID 3824 wrote to memory of 4228	3824	svchost.exe	112
PID 3824 wrote to memory of 4908	3824	svchost.exe	113

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks computer location settings
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3984
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4936
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:4212
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp93F8.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4712
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:740
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Looks for VirtualBox Guest Additions in registry
    - Looks for VMWare Tools registry key
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Maps connected drives based on registry
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3824
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe"
      4⤵
      PID:2500
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ServiceModelReg.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ServiceModelReg.exe"
      4⤵
      PID:4508
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regsql.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regsql.exe"
      4⤵
      PID:2844
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SMSvcHost.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SMSvcHost.exe"
      4⤵
      PID:4416
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe"
      4⤵
      PID:4424
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\DataSvcUtil.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\DataSvcUtil.exe"
      4⤵
      PID:4536
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngentask.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngentask.exe"
      4⤵
      PID:1880
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe"
      4⤵
      PID:5088
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ilasm.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ilasm.exe"
      4⤵
      PID:4412
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"
      4⤵
      PID:4132
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regbrowsers.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regbrowsers.exe"
      4⤵
      PID:4808
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_state.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_state.exe"
      4⤵
      PID:4568
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe"
      4⤵
      PID:3084
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe"
      4⤵
      PID:4688
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe"
      4⤵
      PID:4372
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe"
      4⤵
      PID:4572
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\dfsvc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\dfsvc.exe"
      4⤵
      PID:388
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe"
      4⤵
      PID:4620
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\CasPol.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\CasPol.exe"
      4⤵
      PID:4604
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WsatConfig.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WsatConfig.exe"
      4⤵
      PID:5084
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Workflow.Compiler.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Workflow.Compiler.exe"
      4⤵
      PID:3436
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe"
      4⤵
      PID:1620
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe"
      4⤵
      PID:1312
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe"
      4⤵
      PID:1240
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AppLaunch.exe"
      4⤵
      PID:624
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\EdmGen.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\EdmGen.exe"
      4⤵
      PID:4228
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe"
      4⤵
      PID:4908
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\jsc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\jsc.exe"
      4⤵
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:460

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

Virtualization/Sandbox Evasion