phorphiex | 6ff7acc55f48fa1726291f1ab56c939c66c600c9e98d92255055a38ab2093331

Analysis

max time kernel
149s
max time network
139s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
17-03-2024 17:08

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General

Target

d16a1879e3be4eec83b18124ec5094ad.exe
Size

104KB
MD5

d16a1879e3be4eec83b18124ec5094ad
SHA1

a79d93bf2350f2ce5c87741c7da0049f200d96b2
SHA256

6ff7acc55f48fa1726291f1ab56c939c66c600c9e98d92255055a38ab2093331
SHA512

33a34adbafbdc603ac7d9530337b44a46bad68046c68066c9c6970a5021f3e5a2e0e034bfb23232b9ca1d9dcafb4a33cc96c2906e229f8b7d69ce345db1d1c0c
SSDEEP

3072:Xl58BV2ZjooGTb5PjMdhS3KV3/jjKwcNHjo86r8X7FS8EFcv:158BIFveZjMrS3q3/jjKwcNHjo86r8r3

Score

10^/10

phorphiex evasion loader persistence trojan worm

Malware Config

Signatures

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

Phorphiex payload 1 IoCs

Processes:

resource	yara_rule
\13806394810512\smss.exe	family_phorphiex

Windows security bypass 2 TTPs 6 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

smss.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	smss.exe

Executes dropped EXE 1 IoCs

Processes:

smss.exe

pid process

1168 smss.exe
Loads dropped DLL 1 IoCs

Processes:

d16a1879e3be4eec83b18124ec5094ad.exe

pid process

384 d16a1879e3be4eec83b18124ec5094ad.exe

pid	process
1168	smss.exe

pid	process
384	d16a1879e3be4eec83b18124ec5094ad.exe

Windows security modification 2 TTPs 7 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

smss.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiSpywareOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	smss.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

d16a1879e3be4eec83b18124ec5094ad.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Host Process for Windows Services = "C:\\13806394810512\\smss.exe"	d16a1879e3be4eec83b18124ec5094ad.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\Host Process for Windows Services = "C:\\13806394810512\\smss.exe"	d16a1879e3be4eec83b18124ec5094ad.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

d16a1879e3be4eec83b18124ec5094ad.exe

description	pid	process	target process
PID 384 wrote to memory of 1168	384	d16a1879e3be4eec83b18124ec5094ad.exe	smss.exe
PID 384 wrote to memory of 1168	384	d16a1879e3be4eec83b18124ec5094ad.exe	smss.exe
PID 384 wrote to memory of 1168	384	d16a1879e3be4eec83b18124ec5094ad.exe	smss.exe
PID 384 wrote to memory of 1168	384	d16a1879e3be4eec83b18124ec5094ad.exe	smss.exe

C:\Users\Admin\AppData\Local\Temp\d16a1879e3be4eec83b18124ec5094ad.exe
"C:\Users\Admin\AppData\Local\Temp\d16a1879e3be4eec83b18124ec5094ad.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:384

C:\13806394810512\smss.exe
C:\13806394810512\smss.exe
2⤵
- Windows security bypass
- Executes dropped EXE
- Windows security modification
PID:1168

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

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\13806394810512\smss.exe
Filesize
104KB

MD5
d16a1879e3be4eec83b18124ec5094ad

SHA1
a79d93bf2350f2ce5c87741c7da0049f200d96b2

SHA256
6ff7acc55f48fa1726291f1ab56c939c66c600c9e98d92255055a38ab2093331

SHA512
33a34adbafbdc603ac7d9530337b44a46bad68046c68066c9c6970a5021f3e5a2e0e034bfb23232b9ca1d9dcafb4a33cc96c2906e229f8b7d69ce345db1d1c0c

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