xtremerat | 26d1ef36f48df366d3616fbecc3fa5e702a97ff2aa73aebbeb703880be63b8f5

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	JaffaCakes118_453d36819232cb50090b2848bd24e31d.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

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{4WH4735F-E4LW-0X8H-8SVN-K3EE2070T60S}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4WH4735F-E4LW-0X8H-8SVN-K3EE2070T60S}\StubPath = "C:\\Windows\\InstallDir\\Server.exe restart"	svchost.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{4WH4735F-E4LW-0X8H-8SVN-K3EE2070T60S}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4WH4735F-E4LW-0X8H-8SVN-K3EE2070T60S}\StubPath = "C:\\Windows\\InstallDir\\Server.exe"	svchost.exe

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Wine	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\InstallDir\\Server.exe"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\Server.exe"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\InstallDir\\Server.exe"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\Server.exe"	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2812 set thread context of 2640	2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	30

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2640-8-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/2640-7-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/2640-15-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/2640-14-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/2640-11-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/2504-22-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/3048-25-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/3048-28-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/3048-27-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/2504-30-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral1/memory/3048-31-0x0000000010000000-0x000000001004D000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\InstallDir\Server.exe	svchost.exe
File created	C:\Windows\InstallDir\Server.exe	svchost.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 4 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	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe
3048	svchost.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2812 wrote to memory of 2640	2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	30
PID 2812 wrote to memory of 2640	2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	30
PID 2812 wrote to memory of 2640	2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	30
PID 2812 wrote to memory of 2640	2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	30
PID 2812 wrote to memory of 2640	2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	30
PID 2812 wrote to memory of 2640	2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	30
PID 2812 wrote to memory of 2640	2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	30
PID 2812 wrote to memory of 2640	2812	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	30
PID 2640 wrote to memory of 2504	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	31
PID 2640 wrote to memory of 2504	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	31
PID 2640 wrote to memory of 2504	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	31
PID 2640 wrote to memory of 2504	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	31
PID 2640 wrote to memory of 2504	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	31
PID 2640 wrote to memory of 3048	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	32
PID 2640 wrote to memory of 3048	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	32
PID 2640 wrote to memory of 3048	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	32
PID 2640 wrote to memory of 3048	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	32
PID 2640 wrote to memory of 3048	2640	JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2812
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_453d36819232cb50090b2848bd24e31d.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2640
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - Boot or Logon Autostart Execution: Active Setup
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:2504
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - Boot or Logon Autostart Execution: Active Setup
    - Adds Run key to start application
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:3048

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

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

Credential Access

Discovery

Query Registry

3

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion