Malware Analysis Report

2024-09-22 14:51

Sample ID 240618-lhzqpaxeqd
Target 74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80
SHA256 74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80
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

74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80

Threat Level: Known bad

The file 74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80 was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

Gh0strat

Gh0st RAT payload

Detect PurpleFox Rootkit

PurpleFox

Drops file in Drivers directory

Sets service image path in registry

Loads dropped DLL

Executes dropped EXE

Deletes itself

Drops file in System32 directory

Unsigned PE

Runs ping.exe

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: LoadsDriver

Suspicious use of WriteProcessMemory

Modifies data under HKEY_USERS

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

win7-20240508-en

Max time kernel

145s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe"

Signatures

Detect PurpleFox Rootkit

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

Gh0st RAT payload

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

Loads dropped DLL

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\Jbcdt.exe C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe N/A
File opened for modification C:\Windows\SysWOW64\Jbcdt.exe C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings C:\Windows\SysWOW64\Jbcdt.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix C:\Windows\SysWOW64\Jbcdt.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" C:\Windows\SysWOW64\Jbcdt.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" C:\Windows\SysWOW64\Jbcdt.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\Jbcdt.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Jbcdt.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Jbcdt.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Jbcdt.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Jbcdt.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Jbcdt.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2756 wrote to memory of 2052 N/A C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe C:\Windows\SysWOW64\cmd.exe
PID 2756 wrote to memory of 2052 N/A C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe C:\Windows\SysWOW64\cmd.exe
PID 2756 wrote to memory of 2052 N/A C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe C:\Windows\SysWOW64\cmd.exe
PID 2756 wrote to memory of 2052 N/A C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe C:\Windows\SysWOW64\cmd.exe
PID 1244 wrote to memory of 2980 N/A C:\Windows\SysWOW64\Jbcdt.exe C:\Windows\SysWOW64\Jbcdt.exe
PID 1244 wrote to memory of 2980 N/A C:\Windows\SysWOW64\Jbcdt.exe C:\Windows\SysWOW64\Jbcdt.exe
PID 1244 wrote to memory of 2980 N/A C:\Windows\SysWOW64\Jbcdt.exe C:\Windows\SysWOW64\Jbcdt.exe
PID 1244 wrote to memory of 2980 N/A C:\Windows\SysWOW64\Jbcdt.exe C:\Windows\SysWOW64\Jbcdt.exe
PID 2052 wrote to memory of 2732 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2052 wrote to memory of 2732 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2052 wrote to memory of 2732 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2052 wrote to memory of 2732 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe

"C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe"

C:\Windows\SysWOW64\Jbcdt.exe

C:\Windows\SysWOW64\Jbcdt.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\74C832~1.EXE > nul

C:\Windows\SysWOW64\Jbcdt.exe

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

C:\Windows\SysWOW64\PING.EXE

ping -n 2 127.0.0.1

Network

Country Destination Domain Proto
US 8.8.8.8:53 456418.e3.luyouxia.net udp
CN 115.231.218.42:12822 456418.e3.luyouxia.net tcp
CN 115.231.218.42:12822 456418.e3.luyouxia.net tcp
CN 115.231.218.42:12822 456418.e3.luyouxia.net tcp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
CN 124.248.69.29:12822 456418.e3.luyouxia.net tcp
CN 124.248.69.29:12822 456418.e3.luyouxia.net tcp
CN 124.248.69.29:12822 456418.e3.luyouxia.net tcp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
CN 123.99.198.130:12822 456418.e3.luyouxia.net tcp

Files

memory/2756-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\Jbcdt.exe

MD5 5a4296be52773d17b2f7e5aa19c3bc84
SHA1 1bbbdec2d90896aa376a32f0fad6493c53376995
SHA256 74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80
SHA512 6e5666767ab91055ee2b583402562be9a16b9db10c5c4e1e3b7244621415217d66ac5f3a49ea6a471727cb2c32339b472f738f30958cff9c6a21018c66273806

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-18 09:32

Reported

2024-06-18 09:35

Platform

win10v2004-20240508-en

Max time kernel

142s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.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
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
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\Jbcdt.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\Jbcdt.exe N/A

Executes dropped EXE

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\Jbcdt.exe C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe N/A
File opened for modification C:\Windows\SysWOW64\Jbcdt.exe C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix C:\Windows\SysWOW64\Jbcdt.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" C:\Windows\SysWOW64\Jbcdt.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" C:\Windows\SysWOW64\Jbcdt.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\Jbcdt.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Jbcdt.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Jbcdt.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Jbcdt.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Jbcdt.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Jbcdt.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe

"C:\Users\Admin\AppData\Local\Temp\74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80.exe"

C:\Windows\SysWOW64\Jbcdt.exe

C:\Windows\SysWOW64\Jbcdt.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\74C832~1.EXE > nul

C:\Windows\SysWOW64\Jbcdt.exe

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

C:\Windows\SysWOW64\PING.EXE

ping -n 2 127.0.0.1

Network

Country Destination Domain Proto
US 8.8.8.8:53 456418.e3.luyouxia.net udp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
US 8.8.8.8:53 456418.e3.luyouxia.net udp

Files

memory/4704-1-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\Jbcdt.exe

MD5 5a4296be52773d17b2f7e5aa19c3bc84
SHA1 1bbbdec2d90896aa376a32f0fad6493c53376995
SHA256 74c8328aa88e1bd7f0e31b1f5b76f38c4361264ed95102c8416f42cdd41c0c80
SHA512 6e5666767ab91055ee2b583402562be9a16b9db10c5c4e1e3b7244621415217d66ac5f3a49ea6a471727cb2c32339b472f738f30958cff9c6a21018c66273806

memory/2788-10-0x0000000010000000-0x000000001019F000-memory.dmp

memory/632-17-0x0000000010000000-0x000000001019F000-memory.dmp