phorphiex | 4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612

Analysis

max time kernel
150s
max time network
149s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
09-10-2024 13:37

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General

Target

4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe
Size

63KB
MD5

caa7ab8fe75eeebcbc0ea55bb39f9a71
SHA1

6e5f44af3aa46bd781a18ea24b9812050dea2080
SHA256

4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612
SHA512

403b110f0c1ee4c185a6d65a8c2c108ab303ef772921c1e5087dbb005efdf66b709eda53b517fe030fea664588b66510f4c56762b1ddee55ed48912372a41907
SSDEEP

192:H5bolKSc+4xIBaOcShEJxTqthpmmmmmmmmmmmmmmmmmmmmm7mmmmmmmmmmmmmmmW:H5oc+4ekuhEuA

Score

10^/10

phorphiex discovery evasion execution loader persistence trojan worm

Malware Config

Signatures

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wuauserv\Start = "4"	sysvplervcs.exe

Phorphiex payload 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000016dcb-4.dat	family_phorphiex

Phorphiex, Phorpiex
Phorphiex or Phorpiex 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 6 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2656	powershell.exe

Downloads MZ/PE file
Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Executes dropped EXE 4 IoCs

pid	Process
2436	25444.scr
2360	sysvplervcs.exe
1592	388510634.exe
2208	96811910.exe

Loads dropped DLL 4 IoCs

pid	Process
1720	4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe
1720	4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe
2360	sysvplervcs.exe
2360	sysvplervcs.exe

Windows security modification 2 TTPs 7 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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

Adds Run key to start application 2 TTPs 1 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\Windows Settings = "C:\\Windows\\sysvplervcs.exe"	25444.scr

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\sysvplervcs.exe	25444.scr
File opened for modification	C:\Windows\sysvplervcs.exe	25444.scr

Launches sc.exe 5 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2816	sc.exe
2772	sc.exe
2680	sc.exe
2484	sc.exe
2648	sc.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 11 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	sysvplervcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	25444.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2656	powershell.exe
1592	388510634.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2656	powershell.exe
Token: SeDebugPrivilege	1592	388510634.exe

Suspicious use of WriteProcessMemory 60 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 2436	1720	4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe	32
PID 1720 wrote to memory of 2436	1720	4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe	32
PID 1720 wrote to memory of 2436	1720	4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe	32
PID 1720 wrote to memory of 2436	1720	4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe	32
PID 2436 wrote to memory of 2360	2436	25444.scr	33
PID 2436 wrote to memory of 2360	2436	25444.scr	33
PID 2436 wrote to memory of 2360	2436	25444.scr	33
PID 2436 wrote to memory of 2360	2436	25444.scr	33
PID 2360 wrote to memory of 2640	2360	sysvplervcs.exe	34
PID 2360 wrote to memory of 2640	2360	sysvplervcs.exe	34
PID 2360 wrote to memory of 2640	2360	sysvplervcs.exe	34
PID 2360 wrote to memory of 2640	2360	sysvplervcs.exe	34
PID 2360 wrote to memory of 2280	2360	sysvplervcs.exe	35
PID 2360 wrote to memory of 2280	2360	sysvplervcs.exe	35
PID 2360 wrote to memory of 2280	2360	sysvplervcs.exe	35
PID 2360 wrote to memory of 2280	2360	sysvplervcs.exe	35
PID 2640 wrote to memory of 2656	2640	cmd.exe	39
PID 2640 wrote to memory of 2656	2640	cmd.exe	39
PID 2640 wrote to memory of 2656	2640	cmd.exe	39
PID 2640 wrote to memory of 2656	2640	cmd.exe	39
PID 2280 wrote to memory of 2816	2280	cmd.exe	38
PID 2280 wrote to memory of 2816	2280	cmd.exe	38
PID 2280 wrote to memory of 2816	2280	cmd.exe	38
PID 2280 wrote to memory of 2816	2280	cmd.exe	38
PID 2280 wrote to memory of 2772	2280	cmd.exe	40
PID 2280 wrote to memory of 2772	2280	cmd.exe	40
PID 2280 wrote to memory of 2772	2280	cmd.exe	40
PID 2280 wrote to memory of 2772	2280	cmd.exe	40
PID 2280 wrote to memory of 2680	2280	cmd.exe	41
PID 2280 wrote to memory of 2680	2280	cmd.exe	41
PID 2280 wrote to memory of 2680	2280	cmd.exe	41
PID 2280 wrote to memory of 2680	2280	cmd.exe	41
PID 2280 wrote to memory of 2484	2280	cmd.exe	42
PID 2280 wrote to memory of 2484	2280	cmd.exe	42
PID 2280 wrote to memory of 2484	2280	cmd.exe	42
PID 2280 wrote to memory of 2484	2280	cmd.exe	42
PID 2280 wrote to memory of 2648	2280	cmd.exe	43
PID 2280 wrote to memory of 2648	2280	cmd.exe	43
PID 2280 wrote to memory of 2648	2280	cmd.exe	43
PID 2280 wrote to memory of 2648	2280	cmd.exe	43
PID 2360 wrote to memory of 1592	2360	sysvplervcs.exe	45
PID 2360 wrote to memory of 1592	2360	sysvplervcs.exe	45
PID 2360 wrote to memory of 1592	2360	sysvplervcs.exe	45
PID 2360 wrote to memory of 1592	2360	sysvplervcs.exe	45
PID 1592 wrote to memory of 2140	1592	388510634.exe	46
PID 1592 wrote to memory of 2140	1592	388510634.exe	46
PID 1592 wrote to memory of 2140	1592	388510634.exe	46
PID 1592 wrote to memory of 1508	1592	388510634.exe	48
PID 1592 wrote to memory of 1508	1592	388510634.exe	48
PID 1592 wrote to memory of 1508	1592	388510634.exe	48
PID 1508 wrote to memory of 1528	1508	cmd.exe	50
PID 1508 wrote to memory of 1528	1508	cmd.exe	50
PID 1508 wrote to memory of 1528	1508	cmd.exe	50
PID 2140 wrote to memory of 1532	2140	cmd.exe	51
PID 2140 wrote to memory of 1532	2140	cmd.exe	51
PID 2140 wrote to memory of 1532	2140	cmd.exe	51
PID 2360 wrote to memory of 2208	2360	sysvplervcs.exe	52
PID 2360 wrote to memory of 2208	2360	sysvplervcs.exe	52
PID 2360 wrote to memory of 2208	2360	sysvplervcs.exe	52
PID 2360 wrote to memory of 2208	2360	sysvplervcs.exe	52

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe
"C:\Users\Admin\AppData\Local\Temp\4bf40544a1ffc64b6b26b5f24d8f624b7260cc40b34566b3463cae817bf7b612.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Users\Admin\AppData\Local\Temp\25444.scr
  "C:\Users\Admin\AppData\Local\Temp\25444.scr" /S
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2436
- - C:\Windows\sysvplervcs.exe
    C:\Windows\sysvplervcs.exe
    3⤵
    - Modifies security service
    - Windows security bypass
    - Executes dropped EXE
    - Loads dropped DLL
    - Windows security modification
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2360
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c powershell -Command "Add-MpPreference -ExclusionPath $env:windir; Add-MpPreference -ExclusionPath $env:TEMP; Add-MpPreference -ExclusionPath $env:USERPROFILE"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2640
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell -Command "Add-MpPreference -ExclusionPath $env:windir; Add-MpPreference -ExclusionPath $env:TEMP; Add-MpPreference -ExclusionPath $env:USERPROFILE"
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2656
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop DoSvc & sc stop BITS /wait
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2280
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop UsoSvc
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:2816
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop WaaSMedicSvc
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:2772
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop wuauserv
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:2680
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop DoSvc
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:2484
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop BITS /wait
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:2648
  - - C:\Users\Admin\AppData\Local\Temp\388510634.exe
      C:\Users\Admin\AppData\Local\Temp\388510634.exe
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1592
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c reg delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Windows Upgrade Manager" /f
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2140
      - C:\Windows\system32\reg.exe
        
        reg delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Windows Upgrade Manager" /f
        6⤵
        
        PID:1532
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "Windows Upgrade Manager"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1508
      - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "Windows Upgrade Manager"
        6⤵
        
        PID:1528
  - - C:\Users\Admin\AppData\Local\Temp\96811910.exe
      C:\Users\Admin\AppData\Local\Temp\96811910.exe
      4⤵
      Executes dropped EXE
      PID:2208

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\4RXRX1VH\1[1]

Filesize
108KB

MD5
1fcb78fb6cf9720e9d9494c42142d885

SHA1
fef9c2e728ab9d56ce9ed28934b3182b6f1d5379

SHA256
84652bb8c63ca4fd7eb7a2d6ef44029801f3057aa2961867245a3a765928dd02

SHA512
cdf58e463af1784aea86995b3e5d6b07701c5c4095e30ec80cc901ffd448c6f4f714c521bf8796ffa8c47538bf8bf5351e157596efaa7ab88155d63dc33f7dc3

Download Submit
C:\Users\Admin\AppData\Local\Temp\25444.scr

Filesize
96KB

MD5
930c41bc0c20865af61a95bcf0c3b289

SHA1
cecf37c3b6c76d9a79dd2a97cfc518621a6ac924

SHA256
1f2e9724dfb091059ae16c305601e21d64b5308df76ddef6b394573e576ef1ff

SHA512
fa1f33c71da608b3980038981220fcebee0b0cc44331e52f5198dd2761c97631ee8286756c2cc16245a1370c83bb53cc8ea8ef64e0fcdd30af51f023973986b2

Download Submit
\Users\Admin\AppData\Local\Temp\388510634.exe

Filesize
8KB

MD5
cb8420e681f68db1bad5ed24e7b22114

SHA1
416fc65d538d3622f5ca71c667a11df88a927c31

SHA256
5850892f67f85991b31fc90f62c8b7791afeb3c08ae1877d857aa2b59471a2ea

SHA512
baaabcc4ad5d409267a34ed7b20e4afb4d247974bfc581d39aae945e5bf8a673a1f8eacae2e6783480c8baaeb0a80d028274a202d456f13d0af956afa0110fdf

Download Submit
\Users\Admin\AppData\Local\Temp\96811910.exe

Filesize
15KB

MD5
0c37ee292fec32dba0420e6c94224e28

SHA1
012cbdddaddab319a4b3ae2968b42950e929c46b

SHA256
981d724feebc36777e99513dc061d1f009e589f965c920797285c46d863060d1

SHA512
2b60b571c55d0441ba0cfc695f9db5cd12660ebec7effc7e893c3b7a1c6cb6149df487c31b8d748697e260cbc4af29331592b705ea9638f64a711c7a6164628b

Download Submit
memory/1592-43-0x000000013FA90000-0x000000013FA96000-memory.dmp

Filesize
24KB

Download