quasar | 12fce52d084a8c7efa638c88fa2307bca7c038a49fe566ebb05533cacf17efbd

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	4363463463464363463463463.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	._cache_4363463463464363463463463.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	._cache_Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	pghsefyjhsef.exe

Executes dropped EXE 11 IoCs

pid	Process
3496	._cache_4363463463464363463463463.exe
804	Synaptics.exe
4180	._cache_Synaptics.exe
2484	tretiy.exe
4372	InstallerPack_20.1.23770_win64.exe
4860	award.pdf.exe
2452	Client-built.exe
3940	kthiokadjg.exe
2060	pghsefyjhsef.exe
4144	Gxtuum.exe
3568	Client.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Synaptics Pointing Device Driver = "C:\\ProgramData\\Synaptics\\Synaptics.exe"	4363463463464363463463463.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
21	raw.githubusercontent.com
22	raw.githubusercontent.com
68	raw.githubusercontent.com

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
75	ip-api.com

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Gxtuum.job	pghsefyjhsef.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
3948	4372	WerFault.exe	95

System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4363463463464363463463463.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Synaptics.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tretiy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallerPack_20.1.23770_win64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pghsefyjhsef.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_4363463463464363463463463.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_Synaptics.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	award.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kthiokadjg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Gxtuum.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "162"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	4363463463464363463463463.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Synaptics.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

persistence execution

Scheduled Task

pid	Process
2424	schtasks.exe
1556	schtasks.exe
4104	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1784	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4372	InstallerPack_20.1.23770_win64.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3496	._cache_4363463463464363463463463.exe
Token: SeDebugPrivilege	4180	._cache_Synaptics.exe
Token: SeDebugPrivilege	2452	Client-built.exe
Token: SeDebugPrivilege	3940	kthiokadjg.exe
Token: SeDebugPrivilege	3568	Client.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1784	EXCEL.EXE
1784	EXCEL.EXE
1784	EXCEL.EXE
1784	EXCEL.EXE
1784	EXCEL.EXE
1784	EXCEL.EXE
1784	EXCEL.EXE
1784	EXCEL.EXE
3940	kthiokadjg.exe
3568	Client.exe
4152	LogonUI.exe
1784	EXCEL.EXE

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 4024 wrote to memory of 3496	4024	4363463463464363463463463.exe	84
PID 4024 wrote to memory of 3496	4024	4363463463464363463463463.exe	84
PID 4024 wrote to memory of 3496	4024	4363463463464363463463463.exe	84
PID 4024 wrote to memory of 804	4024	4363463463464363463463463.exe	86
PID 4024 wrote to memory of 804	4024	4363463463464363463463463.exe	86
PID 4024 wrote to memory of 804	4024	4363463463464363463463463.exe	86
PID 804 wrote to memory of 4180	804	Synaptics.exe	87
PID 804 wrote to memory of 4180	804	Synaptics.exe	87
PID 804 wrote to memory of 4180	804	Synaptics.exe	87
PID 3496 wrote to memory of 2484	3496	._cache_4363463463464363463463463.exe	92
PID 3496 wrote to memory of 2484	3496	._cache_4363463463464363463463463.exe	92
PID 3496 wrote to memory of 2484	3496	._cache_4363463463464363463463463.exe	92
PID 3496 wrote to memory of 4372	3496	._cache_4363463463464363463463463.exe	95
PID 3496 wrote to memory of 4372	3496	._cache_4363463463464363463463463.exe	95
PID 3496 wrote to memory of 4372	3496	._cache_4363463463464363463463463.exe	95
PID 4180 wrote to memory of 4860	4180	._cache_Synaptics.exe	117
PID 4180 wrote to memory of 4860	4180	._cache_Synaptics.exe	117
PID 4180 wrote to memory of 4860	4180	._cache_Synaptics.exe	117
PID 4180 wrote to memory of 2452	4180	._cache_Synaptics.exe	118
PID 4180 wrote to memory of 2452	4180	._cache_Synaptics.exe	118
PID 4180 wrote to memory of 3940	4180	._cache_Synaptics.exe	119
PID 4180 wrote to memory of 3940	4180	._cache_Synaptics.exe	119
PID 4180 wrote to memory of 3940	4180	._cache_Synaptics.exe	119
PID 3496 wrote to memory of 2060	3496	._cache_4363463463464363463463463.exe	120
PID 3496 wrote to memory of 2060	3496	._cache_4363463463464363463463463.exe	120
PID 3496 wrote to memory of 2060	3496	._cache_4363463463464363463463463.exe	120
PID 2452 wrote to memory of 2424	2452	Client-built.exe	121
PID 2452 wrote to memory of 2424	2452	Client-built.exe	121
PID 2452 wrote to memory of 3568	2452	Client-built.exe	123
PID 2452 wrote to memory of 3568	2452	Client-built.exe	123
PID 2060 wrote to memory of 4144	2060	pghsefyjhsef.exe	124
PID 2060 wrote to memory of 4144	2060	pghsefyjhsef.exe	124
PID 2060 wrote to memory of 4144	2060	pghsefyjhsef.exe	124
PID 3940 wrote to memory of 1556	3940	kthiokadjg.exe	126
PID 3940 wrote to memory of 1556	3940	kthiokadjg.exe	126
PID 3940 wrote to memory of 1556	3940	kthiokadjg.exe	126
PID 3568 wrote to memory of 4104	3568	Client.exe	128
PID 3568 wrote to memory of 4104	3568	Client.exe	128

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\4363463463464363463463463.exe
"C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4024
- C:\Users\Admin\AppData\Local\Temp\._cache_4363463463464363463463463.exe
  "C:\Users\Admin\AppData\Local\Temp\._cache_4363463463464363463463463.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3496
- - C:\Users\Admin\AppData\Local\Temp\Files\tretiy.exe
    "C:\Users\Admin\AppData\Local\Temp\Files\tretiy.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2484
- - C:\Users\Admin\AppData\Local\Temp\Files\InstallerPack_20.1.23770_win64.exe
    "C:\Users\Admin\AppData\Local\Temp\Files\InstallerPack_20.1.23770_win64.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4372
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4372 -s 1268
      4⤵
      Program crash
      PID:3948
- - C:\Users\Admin\AppData\Local\Temp\Files\pghsefyjhsef.exe
    "C:\Users\Admin\AppData\Local\Temp\Files\pghsefyjhsef.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2060
  - - C:\Users\Admin\AppData\Local\Temp\bfe2cd46d6\Gxtuum.exe
      "C:\Users\Admin\AppData\Local\Temp\bfe2cd46d6\Gxtuum.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:4144
- C:\ProgramData\Synaptics\Synaptics.exe
  "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:804
- - C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe
    "C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe" InjUpdate
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4180
  - - C:\Users\Admin\AppData\Local\Temp\Files\award.pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\Files\award.pdf.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:4860
  - - C:\Users\Admin\AppData\Local\Temp\Files\Client-built.exe
      "C:\Users\Admin\AppData\Local\Temp\Files\Client-built.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2452
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "MS Build Tools" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft-Build-Tools\Client.exe" /rl HIGHEST /f
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:2424
    - - C:\Users\Admin\AppData\Roaming\Microsoft-Build-Tools\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\Microsoft-Build-Tools\Client.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:3568
      - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "MS Build Tools" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft-Build-Tools\Client.exe" /rl HIGHEST /f
        6⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:4104
  - - C:\Users\Admin\AppData\Local\Temp\Files\kthiokadjg.exe
      "C:\Users\Admin\AppData\Local\Temp\Files\kthiokadjg.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3940
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "NET framework" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Files\kthiokadjg.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1556

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" /automation -Embedding
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4372 -ip 4372
1⤵
PID:4024

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa38f7055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:4152

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

System Information Discovery