quasar | 6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	test1.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	test1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	test1.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
25	ip-api.com

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe
File opened for modification	C:\Windows\assembly	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

pid	Process
2424	schtasks.exe
816	schtasks.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4252	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1444	powershell.exe
1444	powershell.exe
1820	test1.exe
1820	test1.exe
1820	test1.exe
1820	test1.exe
1820	test1.exe
1820	test1.exe
1820	test1.exe
4376	test1.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeRestorePrivilege	4984	dw20.exe
Token: SeBackupPrivilege	4984	dw20.exe
Token: SeBackupPrivilege	4984	dw20.exe
Token: SeBackupPrivilege	4984	dw20.exe
Token: SeDebugPrivilege	1820	test1.exe
Token: SeDebugPrivilege	1444	powershell.exe
Token: SeDebugPrivilege	4632	Client.exe
Token: SeDebugPrivilege	4632	Client.exe
Token: SeDebugPrivilege	4376	test1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4632	Client.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 1820	2092	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe	82
PID 2092 wrote to memory of 1820	2092	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe	82
PID 2092 wrote to memory of 1820	2092	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe	82
PID 2092 wrote to memory of 4984	2092	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe	83
PID 2092 wrote to memory of 4984	2092	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe	83
PID 2092 wrote to memory of 4984	2092	6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe	83
PID 1820 wrote to memory of 2424	1820	test1.exe	88
PID 1820 wrote to memory of 2424	1820	test1.exe	88
PID 1820 wrote to memory of 2424	1820	test1.exe	88
PID 1820 wrote to memory of 4632	1820	test1.exe	89
PID 1820 wrote to memory of 4632	1820	test1.exe	89
PID 1820 wrote to memory of 4632	1820	test1.exe	89
PID 1820 wrote to memory of 1444	1820	test1.exe	90
PID 1820 wrote to memory of 1444	1820	test1.exe	90
PID 1820 wrote to memory of 1444	1820	test1.exe	90
PID 4632 wrote to memory of 816	4632	Client.exe	92
PID 4632 wrote to memory of 816	4632	Client.exe	92
PID 4632 wrote to memory of 816	4632	Client.exe	92
PID 1820 wrote to memory of 4788	1820	test1.exe	97
PID 1820 wrote to memory of 4788	1820	test1.exe	97
PID 1820 wrote to memory of 4788	1820	test1.exe	97
PID 4788 wrote to memory of 4340	4788	cmd.exe	99
PID 4788 wrote to memory of 4340	4788	cmd.exe	99
PID 4788 wrote to memory of 4340	4788	cmd.exe	99
PID 1820 wrote to memory of 1044	1820	test1.exe	103
PID 1820 wrote to memory of 1044	1820	test1.exe	103
PID 1820 wrote to memory of 1044	1820	test1.exe	103
PID 1044 wrote to memory of 1636	1044	cmd.exe	105
PID 1044 wrote to memory of 1636	1044	cmd.exe	105
PID 1044 wrote to memory of 1636	1044	cmd.exe	105
PID 1044 wrote to memory of 4252	1044	cmd.exe	106
PID 1044 wrote to memory of 4252	1044	cmd.exe	106
PID 1044 wrote to memory of 4252	1044	cmd.exe	106
PID 1044 wrote to memory of 4376	1044	cmd.exe	107
PID 1044 wrote to memory of 4376	1044	cmd.exe	107
PID 1044 wrote to memory of 4376	1044	cmd.exe	107

C:\Users\Admin\AppData\Local\Temp\6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe
"C:\Users\Admin\AppData\Local\Temp\6fb67950f8de0f87ee4cd34d50d068ee4b5e5418d363a189da0d9949db6be8ed.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Users\Admin\AppData\Roaming\test1.exe
  "C:\Users\Admin\AppData\Roaming\test1.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Windows security modification
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1820
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\test1.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2424
- - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4632
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:816
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Get-MpPreference -verbose
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1444
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4788
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
      4⤵
      PID:4340
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\eLi7bmQLrBEk.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1044
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:1636
  - - C:\Windows\SysWOW64\PING.EXE
      ping -n 10 localhost
      4⤵
      Runs ping.exe
      PID:4252
  - - C:\Users\Admin\AppData\Roaming\test1.exe
      "C:\Users\Admin\AppData\Roaming\test1.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4376
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
  dw20.exe -x -s 1560
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:4984

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Modify Existing Service

T1031

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

Query Registry

Remote System Discovery

T1018

System Information Discovery