Malware Analysis Report

2024-09-22 14:46

Sample ID 240618-lhzexs1hmq
Target 4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526
SHA256 4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526
Tags
gh0strat purplefox persistence rat rootkit trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526

Threat Level: Known bad

The file 4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526 was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

Detect PurpleFox Rootkit

Gh0st RAT payload

PurpleFox

Gh0strat

Drops file in Drivers directory

Sets service image path in registry

Executes dropped EXE

Loads dropped DLL

Deletes itself

Drops file in System32 directory

Unsigned PE

Suspicious use of WriteProcessMemory

Runs ping.exe

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: LoadsDriver

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-18 09:32

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-18 09:32

Reported

2024-06-18 09:35

Platform

win7-20240221-en

Max time kernel

147s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe"

Signatures

Detect PurpleFox Rootkit

rootkit
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Gh0st RAT payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Gh0strat

rat gh0strat

PurpleFox

rootkit trojan purplefox

Drops file in Drivers directory

Description Indicator Process Target
File created C:\Windows\system32\drivers\QAssist.sys C:\Windows\SysWOW64\Skcsk.exe N/A

Sets service image path in registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\QAssist\ImagePath = "system32\\DRIVERS\\QAssist.sys" C:\Windows\SysWOW64\Skcsk.exe N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\Skcsk.exe N/A
N/A N/A C:\Windows\SysWOW64\Skcsk.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\Skcsk.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Skcsk.exe C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe N/A
File created C:\Windows\SysWOW64\Skcsk.exe C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe N/A

Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\PING.EXE N/A

Suspicious behavior: LoadsDriver

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\Skcsk.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Skcsk.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Skcsk.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Skcsk.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Skcsk.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Skcsk.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2020 wrote to memory of 2648 N/A C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe C:\Windows\SysWOW64\cmd.exe
PID 2020 wrote to memory of 2648 N/A C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe C:\Windows\SysWOW64\cmd.exe
PID 2020 wrote to memory of 2648 N/A C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe C:\Windows\SysWOW64\cmd.exe
PID 2020 wrote to memory of 2648 N/A C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe C:\Windows\SysWOW64\cmd.exe
PID 3056 wrote to memory of 2664 N/A C:\Windows\SysWOW64\Skcsk.exe C:\Windows\SysWOW64\Skcsk.exe
PID 3056 wrote to memory of 2664 N/A C:\Windows\SysWOW64\Skcsk.exe C:\Windows\SysWOW64\Skcsk.exe
PID 3056 wrote to memory of 2664 N/A C:\Windows\SysWOW64\Skcsk.exe C:\Windows\SysWOW64\Skcsk.exe
PID 3056 wrote to memory of 2664 N/A C:\Windows\SysWOW64\Skcsk.exe C:\Windows\SysWOW64\Skcsk.exe
PID 2648 wrote to memory of 2604 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2648 wrote to memory of 2604 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2648 wrote to memory of 2604 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2648 wrote to memory of 2604 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe

"C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe"

C:\Windows\SysWOW64\Skcsk.exe

C:\Windows\SysWOW64\Skcsk.exe -auto

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ping -n 2 127.0.0.1 > nul && del C:\Users\Admin\AppData\Local\Temp\4DA697~1.EXE > nul

C:\Windows\SysWOW64\Skcsk.exe

C:\Windows\SysWOW64\Skcsk.exe -acsi

C:\Windows\SysWOW64\PING.EXE

ping -n 2 127.0.0.1

Network

Country Destination Domain Proto
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp

Files

memory/2020-0-0x0000000010000000-0x000000001019F000-memory.dmp

memory/2664-19-0x0000000010000000-0x000000001019F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-18 09:32

Reported

2024-06-18 09:35

Platform

win10v2004-20240508-en

Max time kernel

148s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe"

Signatures

Detect PurpleFox Rootkit

rootkit
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Gh0st RAT payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Gh0strat

rat gh0strat

PurpleFox

rootkit trojan purplefox

Drops file in Drivers directory

Description Indicator Process Target
File created C:\Windows\system32\drivers\QAssist.sys C:\Windows\SysWOW64\Skcsk.exe N/A

Sets service image path in registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\QAssist\ImagePath = "system32\\DRIVERS\\QAssist.sys" C:\Windows\SysWOW64\Skcsk.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\Skcsk.exe N/A
N/A N/A C:\Windows\SysWOW64\Skcsk.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Skcsk.exe C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe N/A
File created C:\Windows\SysWOW64\Skcsk.exe C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe N/A

Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\PING.EXE N/A

Suspicious behavior: LoadsDriver

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\Skcsk.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Skcsk.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Skcsk.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Skcsk.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Skcsk.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Skcsk.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe

"C:\Users\Admin\AppData\Local\Temp\4da69759abf3dbd32f4fe04645a947cb1d87fe65482b4954d08c071d7d7e1526.exe"

C:\Windows\SysWOW64\Skcsk.exe

C:\Windows\SysWOW64\Skcsk.exe -auto

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ping -n 2 127.0.0.1 > nul && del C:\Users\Admin\AppData\Local\Temp\4DA697~1.EXE > nul

C:\Windows\SysWOW64\Skcsk.exe

C:\Windows\SysWOW64\Skcsk.exe -acsi

C:\Windows\SysWOW64\PING.EXE

ping -n 2 127.0.0.1

Network

Country Destination Domain Proto
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp
CN 103.45.174.206:8080 tcp

Files

memory/4008-0-0x0000000010000000-0x000000001019F000-memory.dmp

memory/2944-11-0x0000000010000000-0x000000001019F000-memory.dmp