44caliber | 17a5e7c0ddc39e588648b9e84e2a4c6ee8243558a6bacc3eceedb8c57ae13e04

System Information Discovery

Processes:

bb0a44e79b092106f1f55f80f5a5554c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	bb0a44e79b092106f1f55f80f5a5554c.exe

Executes dropped EXE 1 IoCs

Processes:

aorbHRzPIL.exe

pid process

2216 aorbHRzPIL.exe

pid	process
2216	aorbHRzPIL.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

aorbHRzPIL.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\aorbHRzPIL = "C:\\Users\\Admin\\AppData\\Local\\Temp\\aorbHRzPIL.exe"	aorbHRzPIL.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\aorbHRzPIL = "C:\\Users\\Admin\\AppData\\Local\\Temp\\aorbHRzPIL.exe"	aorbHRzPIL.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

Processes:

dw20.exe

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

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

Processes:

dw20.exe

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

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

bb0a44e79b092106f1f55f80f5a5554c.exeaorbHRzPIL.exedw20.exe

description	pid	process
Token: SeDebugPrivilege	1232	bb0a44e79b092106f1f55f80f5a5554c.exe
Token: SeDebugPrivilege	2216	aorbHRzPIL.exe
Token: SeBackupPrivilege	1412	dw20.exe
Token: SeBackupPrivilege	1412	dw20.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

bb0a44e79b092106f1f55f80f5a5554c.exeaorbHRzPIL.exe

description	pid	process	target process
PID 1232 wrote to memory of 2216	1232	bb0a44e79b092106f1f55f80f5a5554c.exe	aorbHRzPIL.exe
PID 1232 wrote to memory of 2216	1232	bb0a44e79b092106f1f55f80f5a5554c.exe	aorbHRzPIL.exe
PID 2216 wrote to memory of 1412	2216	aorbHRzPIL.exe	dw20.exe
PID 2216 wrote to memory of 1412	2216	aorbHRzPIL.exe	dw20.exe

C:\Users\Admin\AppData\Local\Temp\bb0a44e79b092106f1f55f80f5a5554c.exe
"C:\Users\Admin\AppData\Local\Temp\bb0a44e79b092106f1f55f80f5a5554c.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1232

C:\Users\Admin\AppData\Local\Temp\aorbHRzPIL.exe
"C:\Users\Admin\AppData\Local\Temp\aorbHRzPIL.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2216

C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
dw20.exe -x -s 844
3⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:1412

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