d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	file1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Policies = "C:\\Windows\\system32\\WinDir\\Svchost.exe"	file1.exe
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	file1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Policies = "C:\\Windows\\system32\\WinDir\\Svchost.exe"	file1.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 4 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{YR6E7B34-B730-QG2X-5Y3Q-SG1FH1213U5K}	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{YR6E7B34-B730-QG2X-5Y3Q-SG1FH1213U5K}\StubPath = "C:\\Windows\\system32\\WinDir\\Svchost.exe"	explorer.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{YR6E7B34-B730-QG2X-5Y3Q-SG1FH1213U5K}	file1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{YR6E7B34-B730-QG2X-5Y3Q-SG1FH1213U5K}\StubPath = "C:\\Windows\\system32\\WinDir\\Svchost.exe Restart"	file1.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	file1.exe

Executes dropped EXE 2 IoCs

pid	Process
2364	file1.exe
2880	Svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
3628	file1.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\system32\\WinDir\\Svchost.exe"	file1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\system32\\WinDir\\Svchost.exe"	file1.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\WinDir\	file1.exe
File created	C:\Windows\SysWOW64\WinDir\Svchost.exe	file1.exe
File opened for modification	C:\Windows\SysWOW64\WinDir\Svchost.exe	file1.exe
File opened for modification	C:\Windows\SysWOW64\WinDir\Svchost.exe	file1.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2364-20-0x0000000010410000-0x0000000010475000-memory.dmp	upx
behavioral2/memory/2364-24-0x0000000010480000-0x00000000104E5000-memory.dmp	upx
behavioral2/memory/2364-82-0x0000000010480000-0x00000000104E5000-memory.dmp	upx

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
3988	2880	WerFault.exe	91

System Location Discovery: System Language Discovery 1 TTPs 6 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	file1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	file1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dw20.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.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 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

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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	file1.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2364	file1.exe
2364	file1.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3628	file1.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeRestorePrivilege	4332	dw20.exe
Token: SeBackupPrivilege	4332	dw20.exe
Token: SeBackupPrivilege	4332	dw20.exe
Token: SeBackupPrivilege	4332	dw20.exe
Token: SeBackupPrivilege	876	explorer.exe
Token: SeRestorePrivilege	876	explorer.exe
Token: SeBackupPrivilege	3628	file1.exe
Token: SeRestorePrivilege	3628	file1.exe
Token: SeDebugPrivilege	3628	file1.exe
Token: SeDebugPrivilege	3628	file1.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2364	file1.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 5020 wrote to memory of 2364	5020	d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe	83
PID 5020 wrote to memory of 2364	5020	d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe	83
PID 5020 wrote to memory of 2364	5020	d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe	83
PID 5020 wrote to memory of 4332	5020	d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe	84
PID 5020 wrote to memory of 4332	5020	d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe	84
PID 5020 wrote to memory of 4332	5020	d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe	84
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56
PID 2364 wrote to memory of 3432	2364	file1.exe	56

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3432
- C:\Users\Admin\AppData\Local\Temp\d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe
  "C:\Users\Admin\AppData\Local\Temp\d8122f54d17b095f838c7451844ee749a68f7b2d44bc4bcb7df131ebc0f81e1a.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5020
- - C:\Users\Admin\AppData\Local\Temp\file1.exe
    "C:\Users\Admin\AppData\Local\Temp\file1.exe"
    3⤵
    - Adds policy Run key to start application
    - Boot or Logon Autostart Execution: Active Setup
    - Executes dropped EXE
    - Adds Run key to start application
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of WriteProcessMemory
    PID:2364
  - - C:\Windows\SysWOW64\explorer.exe
      explorer.exe
      4⤵
      Boot or Logon Autostart Execution: Active Setup
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:876
  - - C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe"
      4⤵
      PID:4592
  - - C:\Users\Admin\AppData\Local\Temp\file1.exe
      "C:\Users\Admin\AppData\Local\Temp\file1.exe"
      4⤵
      Checks computer location settings
      Loads dropped DLL
      Drops file in System32 directory
      System Location Discovery: System Language Discovery
      Modifies registry class
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:3628
    - - C:\Windows\SysWOW64\WinDir\Svchost.exe
        
        "C:\Windows\system32\WinDir\Svchost.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:2880
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2880 -s 588
        6⤵
        Program crash
        
        PID:3988
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
    dw20.exe -x -s 1172
    3⤵
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:4332

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 2880 -ip 2880
1⤵
PID:3232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery