e3ed090d05bdf1272861002996e2c4fa2800bcc041b9005bf79d79c3f7c4acab

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe"	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\useriniti\ImagePath = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe init"	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe

UPX packed file 17 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4912-0-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4976-4-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-6-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-9-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-10-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-11-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-12-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-13-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-14-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-15-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-16-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-17-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-18-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-19-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-20-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-21-0x0000000000400000-0x0000000000557000-memory.dmp	upx
behavioral2/memory/4912-22-0x0000000000400000-0x0000000000557000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\services = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe"	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\service\ARQUIVOS_EXCLUIDOS_8	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 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	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\Enabled = "0"	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4912 wrote to memory of 4976	4912	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe	89
PID 4912 wrote to memory of 4976	4912	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe	89
PID 4912 wrote to memory of 4976	4912	ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe	89

C:\Users\Admin\AppData\Local\Temp\ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe"
1⤵
- Modifies WinLogon for persistence
- Sets service image path in registry
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
PID:4912
- C:\Users\Admin\AppData\Local\Temp\ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\ed491627bfc64abf438a7291c910b843_JaffaCakes118.exe" INSTALL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4976

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=4436,i,11251706013556949551,5157034131170452377,262144 --variations-seed-version --mojo-platform-channel-handle=4232 /prefetch:8
1⤵
PID:1784

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

4

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

2

T1082

System Location Discovery

T1614

System Language Discovery