asyncrat | ee3711e660260539f1fcd84f2546e0bffad1c16e08046e9218aa202f0bf4a233

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	x.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	x.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\SystemBiosVersion	x.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	x.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	svchost.exe

Executes dropped EXE 3 IoCs

pid	Process
4204	Server.exe
3704	x.exe
3272	svchost.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Drops desktop.ini file(s) 8 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\12bb4e264b251b6b53c8cd1194a6ae58\Admin@IDFVLAON_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\12bb4e264b251b6b53c8cd1194a6ae58\Admin@IDFVLAON_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\12bb4e264b251b6b53c8cd1194a6ae58\Admin@IDFVLAON_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Server.exe
File opened for modification	C:\Users\Admin\AppData\Local\12bb4e264b251b6b53c8cd1194a6ae58\Admin@IDFVLAON_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Server.exe
File opened for modification	C:\Users\Admin\AppData\Local\12bb4e264b251b6b53c8cd1194a6ae58\Admin@IDFVLAON_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\12bb4e264b251b6b53c8cd1194a6ae58\Admin@IDFVLAON_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\12bb4e264b251b6b53c8cd1194a6ae58\Admin@IDFVLAON_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\12bb4e264b251b6b53c8cd1194a6ae58\Admin@IDFVLAON_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	Server.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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	x.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	x.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	svchost.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	svchost.exe

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
1148	4204	WerFault.exe	78

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/Job

pid	Process
4844	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4560	timeout.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3704	x.exe
Token: SeDebugPrivilege	4204	Server.exe
Token: SeDebugPrivilege	3704	x.exe
Token: SeDebugPrivilege	3272	svchost.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1536 wrote to memory of 4204	1536	llllllllllll.exe	78
PID 1536 wrote to memory of 4204	1536	llllllllllll.exe	78
PID 1536 wrote to memory of 4204	1536	llllllllllll.exe	78
PID 1536 wrote to memory of 3704	1536	llllllllllll.exe	79
PID 1536 wrote to memory of 3704	1536	llllllllllll.exe	79
PID 3704 wrote to memory of 4844	3704	x.exe	81
PID 3704 wrote to memory of 4844	3704	x.exe	81
PID 3704 wrote to memory of 4876	3704	x.exe	87
PID 3704 wrote to memory of 4876	3704	x.exe	87
PID 3704 wrote to memory of 2696	3704	x.exe	89
PID 3704 wrote to memory of 2696	3704	x.exe	89
PID 2696 wrote to memory of 4560	2696	cmd.exe	91
PID 2696 wrote to memory of 4560	2696	cmd.exe	91

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\llllllllllll.exe
"C:\Users\Admin\AppData\Local\Temp\llllllllllll.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1536
- C:\Users\Admin\AppData\Local\Temp\Server.exe
  "C:\Users\Admin\AppData\Local\Temp\Server.exe"
  2⤵
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Suspicious use of AdjustPrivilegeToken
  PID:4204
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4204 -s 1436
    3⤵
    - Program crash
    PID:1148
- C:\Users\Admin\AppData\Local\Temp\x.exe
  "C:\Users\Admin\AppData\Local\Temp\x.exe"
  2⤵
  - 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 AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3704
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\svchost.exe"
    3⤵
    - Creates scheduled task(s)
    PID:4844
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "svchost"
    3⤵
    PID:4876
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCB01.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2696
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:4560

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4204 -ip 4204
1⤵
PID:4012

C:\Users\Admin\AppData\Local\svchost.exe
C:\Users\Admin\AppData\Local\svchost.exe
1⤵
- 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 AdjustPrivilegeToken
PID:3272

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

T1082

Virtualization/Sandbox Evasion