phorphiex | 68657be04f5b550fec4671437e5dc5849408eada96f5ff44cb0972b0e28ca5be

Windows Service

T1543.003

Disable or Modify Tools

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	svchost.exe

Phorphiex
Malware family which infects systems to distribute other malicious payloads such as ransomware, stealers and cryptominers.
worm trojan loader phorphiex

Phorphiex payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/372-6-0x00000000006F0000-0x00000000007FB000-memory.dmp	family_phorphiex
behavioral2/memory/4708-9-0x00000000007F0000-0x00000000008FB000-memory.dmp	family_phorphiex

Windows security bypass 2 TTPs 6 IoCs

evasion trojan

Disable or Modify Tools

Modify Registry

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

4708 svchost.exe

pid	process
4708	svchost.exe

Windows security modification 2 TTPs 7 IoCs

evasion trojan

Disable or Modify Tools

Modify Registry

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AutoUpdateDisableNotify = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	svchost.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

Processes:

388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft Windows Driver = "C:\\Windows\\266991539317428\\svchost.exe"	388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Microsoft Windows Driver = "C:\\Windows\\266991539317428\\svchost.exe"	388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe

Drops file in Windows directory 3 IoCs

Processes:

388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe

description	ioc	process
File created	C:\Windows\266991539317428\svchost.exe	388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe
File opened for modification	C:\Windows\266991539317428\svchost.exe	388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe
File opened for modification	C:\Windows\266991539317428	388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe

description	pid	process	target process
PID 372 wrote to memory of 4708	372	388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe	svchost.exe
PID 372 wrote to memory of 4708	372	388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe	svchost.exe
PID 372 wrote to memory of 4708	372	388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\388b85eb5ecd9320a1064d7074248253_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:372

C:\Windows\266991539317428\svchost.exe
C:\Windows\266991539317428\svchost.exe
2⤵
- Modifies Windows Defender Real-time Protection settings
- Windows security bypass
- Executes dropped EXE
- Windows security modification
PID:4708

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

4

Impair Defenses

3

T1562

Disable or Modify Tools

3

Credential Access

Discovery

System Information Discovery