fatalrat | a70fe514acbae5c180dbd53901ac1b9cfeab7d9c20b8c096eeb0fe124d3f28ca

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	._cache_sterverexe.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	._cache_Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	sterverexe.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	Synaptics.exe

Executes dropped EXE 5 IoCs

pid	Process
4380	._cache_sterverexe.exe
5108	Synaptics.exe
1632	._cache_Synaptics.exe
4024	._cache_sterverexe.exe
4900	._cache_Synaptics.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SVP7 = "C:\\Users\\Admin\\AppData\\Local\\._cache_Synaptics.exe"	._cache_Synaptics.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Synaptics Pointing Device Driver = "C:\\ProgramData\\Synaptics\\Synaptics.exe"	sterverexe.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SVP7 = "C:\\Users\\Admin\\AppData\\Local\\._cache_sterverexe.exe"	._cache_sterverexe.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	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 registry class 2 IoCs

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1388	EXCEL.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4380	._cache_sterverexe.exe
Token: SeDebugPrivilege	1632	._cache_Synaptics.exe
Token: SeDebugPrivilege	4024	._cache_sterverexe.exe
Token: SeDebugPrivilege	4900	._cache_Synaptics.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
1388	EXCEL.EXE
1388	EXCEL.EXE
1388	EXCEL.EXE
1388	EXCEL.EXE
1388	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 4380	4432	sterverexe.exe	90
PID 4432 wrote to memory of 4380	4432	sterverexe.exe	90
PID 4432 wrote to memory of 4380	4432	sterverexe.exe	90
PID 4432 wrote to memory of 5108	4432	sterverexe.exe	91
PID 4432 wrote to memory of 5108	4432	sterverexe.exe	91
PID 4432 wrote to memory of 5108	4432	sterverexe.exe	91
PID 5108 wrote to memory of 1632	5108	Synaptics.exe	94
PID 5108 wrote to memory of 1632	5108	Synaptics.exe	94
PID 5108 wrote to memory of 1632	5108	Synaptics.exe	94
PID 4380 wrote to memory of 4024	4380	._cache_sterverexe.exe	107
PID 4380 wrote to memory of 4024	4380	._cache_sterverexe.exe	107
PID 4380 wrote to memory of 4024	4380	._cache_sterverexe.exe	107
PID 1632 wrote to memory of 4900	1632	._cache_Synaptics.exe	108
PID 1632 wrote to memory of 4900	1632	._cache_Synaptics.exe	108
PID 1632 wrote to memory of 4900	1632	._cache_Synaptics.exe	108

C:\Users\Admin\AppData\Local\Temp\sterverexe.exe
"C:\Users\Admin\AppData\Local\Temp\sterverexe.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Users\Admin\AppData\Local\Temp\._cache_sterverexe.exe
  "C:\Users\Admin\AppData\Local\Temp\._cache_sterverexe.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4380
- - C:\Users\Admin\AppData\Local\._cache_sterverexe.exe
    "C:\Users\Admin\AppData\Local\._cache_sterverexe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4024
- C:\ProgramData\Synaptics\Synaptics.exe
  "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:5108
- - 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
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1632
  - - C:\Users\Admin\AppData\Local\._cache_Synaptics.exe
      "C:\Users\Admin\AppData\Local\._cache_Synaptics.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:4900

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:1388

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3584,i,6041070687820623968,3004230300437737550,262144 --variations-seed-version --mojo-platform-channel-handle=4344 /prefetch:8
1⤵
PID:408

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