5b8292819e0b12da3b741b2931240222e30d4feec7664c2a20fb01b5396357e8

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	msiexec.exe

Executes dropped EXE 2 IoCs

pid	Process
1696	msiexec.exe
3544	Keygen.PerformanceTest.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0007000000023211-20.dat	upx
behavioral2/memory/3544-24-0x0000000000400000-0x00000000005DE000-memory.dmp	upx
behavioral2/memory/3544-32-0x0000000000400000-0x00000000005DE000-memory.dmp	upx

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\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\msiexec.exe = "C:\\Users\\Admin\\AppData\\Roaming\\msiexec.exe"	msiexec.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	718c3b8cc5e50b1b3714d1bc1dd17ecf.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	718c3b8cc5e50b1b3714d1bc1dd17ecf.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	718c3b8cc5e50b1b3714d1bc1dd17ecf.exe
File created	C:\Windows\assembly\Desktop.ini	718c3b8cc5e50b1b3714d1bc1dd17ecf.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	718c3b8cc5e50b1b3714d1bc1dd17ecf.exe
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	dw20.exe

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

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 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
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	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

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	392	718c3b8cc5e50b1b3714d1bc1dd17ecf.exe
Token: SeRestorePrivilege	1216	dw20.exe
Token: SeBackupPrivilege	1216	dw20.exe
Token: SeBackupPrivilege	1216	dw20.exe
Token: SeBackupPrivilege	1216	dw20.exe
Token: SeBackupPrivilege	1216	dw20.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 392 wrote to memory of 1696	392	718c3b8cc5e50b1b3714d1bc1dd17ecf.exe	97
PID 392 wrote to memory of 1696	392	718c3b8cc5e50b1b3714d1bc1dd17ecf.exe	97
PID 392 wrote to memory of 1696	392	718c3b8cc5e50b1b3714d1bc1dd17ecf.exe	97
PID 1696 wrote to memory of 3544	1696	msiexec.exe	99
PID 1696 wrote to memory of 3544	1696	msiexec.exe	99
PID 1696 wrote to memory of 3544	1696	msiexec.exe	99
PID 1696 wrote to memory of 1216	1696	msiexec.exe	100
PID 1696 wrote to memory of 1216	1696	msiexec.exe	100
PID 1696 wrote to memory of 1216	1696	msiexec.exe	100

C:\Users\Admin\AppData\Local\Temp\718c3b8cc5e50b1b3714d1bc1dd17ecf.exe
"C:\Users\Admin\AppData\Local\Temp\718c3b8cc5e50b1b3714d1bc1dd17ecf.exe"
1⤵
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:392
- C:\Users\Admin\AppData\Roaming\msiexec.exe
  C:\Users\Admin\AppData\Roaming\msiexec.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1696
- - C:\Users\Admin\AppData\Local\Temp\Keygen.PerformanceTest.exe
    "C:\Users\Admin\AppData\Local\Temp\Keygen.PerformanceTest.exe"
    3⤵
    - Executes dropped EXE
    PID:3544
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
    dw20.exe -x -s 1880
    3⤵
    - Drops file in Windows directory
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:1216

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

4