phorphiex | a2d3d6430f6775951cf988d960cfae4093d7a1e4d0f684ddfffaf4599ace9a71

Phorphiex Worm
Malware family which infects systems to distribute other malicious payloads such as ransomware, stealers and cryptominers.
worm trojan loader phorphiex
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Executes dropped EXE 1 IoCs

Processes:

wcfgmgr32.exe

pid process

3628 wcfgmgr32.exe

pid	process
3628	wcfgmgr32.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
C:\Windows\3049586940303040\wcfgmgr32.exe	upx
C:\Windows\3049586940303040\wcfgmgr32.exe	upx

Windows security modification 2 TTPs 7 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

wcfgmgr32.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AutoUpdateDisableNotify = "1"	wcfgmgr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	wcfgmgr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	wcfgmgr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1"	wcfgmgr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	wcfgmgr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	wcfgmgr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	wcfgmgr32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

good.bin.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WCfgMgr32 = "C:\\Windows\\3049586940303040\\wcfgmgr32.exe"	good.bin.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\WCfgMgr32 = "C:\\Windows\\3049586940303040\\wcfgmgr32.exe"	good.bin.exe

Drops file in Windows directory 3 IoCs

Processes:

good.bin.exe

description	ioc	process
File created	C:\Windows\3049586940303040\wcfgmgr32.exe	good.bin.exe
File opened for modification	C:\Windows\3049586940303040\wcfgmgr32.exe	good.bin.exe
File opened for modification	C:\Windows\3049586940303040	good.bin.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

good.bin.exe

description	pid	process	target process
PID 504 wrote to memory of 3628	504	good.bin.exe	wcfgmgr32.exe
PID 504 wrote to memory of 3628	504	good.bin.exe	wcfgmgr32.exe
PID 504 wrote to memory of 3628	504	good.bin.exe	wcfgmgr32.exe

C:\Users\Admin\AppData\Local\Temp\good.bin.exe
"C:\Users\Admin\AppData\Local\Temp\good.bin.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:504

C:\Windows\3049586940303040\wcfgmgr32.exe
C:\Windows\3049586940303040\wcfgmgr32.exe
2⤵
- Executes dropped EXE
- Windows security modification
PID:3628

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\3049586940303040\wcfgmgr32.exe

MD5
b034e2a7cd76b757b7c62ce514b378b4

SHA1
27d15f36cb5e3338a19a7f6441ece58439f830f2

SHA256
90d3580e187b631a9150bbb4a640b84c6fa990437febdc42f687cc7b3ce1deac

SHA512
1cea6503cf244e1efb6ef68994a723f549126fc89ef8a38c76cdcc050d2a4524e96402591d1d150d927a12dcac81084a8275a929cf6e5933fdf62502c9c84385

Download Submit
C:\Windows\3049586940303040\wcfgmgr32.exe

MD5
b034e2a7cd76b757b7c62ce514b378b4

SHA1
27d15f36cb5e3338a19a7f6441ece58439f830f2

SHA256
90d3580e187b631a9150bbb4a640b84c6fa990437febdc42f687cc7b3ce1deac

SHA512
1cea6503cf244e1efb6ef68994a723f549126fc89ef8a38c76cdcc050d2a4524e96402591d1d150d927a12dcac81084a8275a929cf6e5933fdf62502c9c84385

Download Submit
memory/504-0-0x0000000002F12000-0x0000000002F16000-memory.dmp

Filesize
16KB

Download
memory/3628-1-0x0000000000000000-mapping.dmp

Download
memory/3628-4-0x0000000002E21000-0x0000000002E25000-memory.dmp

Filesize
16KB

Download