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

T1082

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

Executes dropped EXE 1 IoCs

pid	Process
1368	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
888	cmd.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

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-1-5-21-1563773381-2037468142-1146002597-1000\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

T1082

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 1368 set thread context of 556	1368	svchost.exe	39

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1976	556	WerFault.exe	39

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
640	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1908	timeout.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2000	file.exe
1368	svchost.exe
1368	svchost.exe
1368	svchost.exe
1368	svchost.exe
1368	svchost.exe
1368	svchost.exe
1368	svchost.exe
1368	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2000	file.exe
Token: SeDebugPrivilege	1368	svchost.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 2000 wrote to memory of 320	2000	file.exe	28
PID 2000 wrote to memory of 320	2000	file.exe	28
PID 2000 wrote to memory of 320	2000	file.exe	28
PID 2000 wrote to memory of 888	2000	file.exe	30
PID 2000 wrote to memory of 888	2000	file.exe	30
PID 2000 wrote to memory of 888	2000	file.exe	30
PID 888 wrote to memory of 1908	888	cmd.exe	32
PID 888 wrote to memory of 1908	888	cmd.exe	32
PID 888 wrote to memory of 1908	888	cmd.exe	32
PID 320 wrote to memory of 640	320	cmd.exe	33
PID 320 wrote to memory of 640	320	cmd.exe	33
PID 320 wrote to memory of 640	320	cmd.exe	33
PID 888 wrote to memory of 1368	888	cmd.exe	34
PID 888 wrote to memory of 1368	888	cmd.exe	34
PID 888 wrote to memory of 1368	888	cmd.exe	34
PID 1368 wrote to memory of 576	1368	svchost.exe	35
PID 1368 wrote to memory of 576	1368	svchost.exe	35
PID 1368 wrote to memory of 576	1368	svchost.exe	35
PID 1368 wrote to memory of 1328	1368	svchost.exe	36
PID 1368 wrote to memory of 1328	1368	svchost.exe	36
PID 1368 wrote to memory of 1328	1368	svchost.exe	36
PID 1368 wrote to memory of 1544	1368	svchost.exe	37
PID 1368 wrote to memory of 1544	1368	svchost.exe	37
PID 1368 wrote to memory of 1544	1368	svchost.exe	37
PID 1368 wrote to memory of 2024	1368	svchost.exe	38
PID 1368 wrote to memory of 2024	1368	svchost.exe	38
PID 1368 wrote to memory of 2024	1368	svchost.exe	38
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 1368 wrote to memory of 556	1368	svchost.exe	39
PID 556 wrote to memory of 1976	556	SetupUtility.exe	40
PID 556 wrote to memory of 1976	556	SetupUtility.exe	40
PID 556 wrote to memory of 1976	556	SetupUtility.exe	40
PID 556 wrote to memory of 1976	556	SetupUtility.exe	40

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
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2000
- 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:320
- - 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:640
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp319C.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:888
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1908
- - 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:1368
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"
      4⤵
      PID:576
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\vbc.exe"
      4⤵
      PID:1328
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\regtlibv12.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\regtlibv12.exe"
      4⤵
      PID:1544
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_state.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_state.exe"
      4⤵
      PID:2024
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\v4.7.03062\SetupUtility.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\v4.7.03062\SetupUtility.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:556
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 556 -s 168
        5⤵
        Program crash
        
        PID:1976

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Scripting

T1064

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Virtualization/Sandbox Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

T1082

Virtualization/Sandbox Evasion