Malware Analysis Report

2024-09-22 14:47

Sample ID 240618-lmkgkasbjk
Target 1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc
SHA256 1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc
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

1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc

Threat Level: Known bad

The file 1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

Detect PurpleFox Rootkit

Gh0st RAT payload

PurpleFox

Gh0strat

Sets service image path in registry

Drops file in Drivers directory

Executes dropped EXE

Loads dropped DLL

Deletes itself

Drops file in System32 directory

Unsigned PE

Suspicious use of WriteProcessMemory

Modifies data under HKEY_USERS

Suspicious behavior: LoadsDriver

Runs ping.exe

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-18 09:38

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-18 09:38

Reported

2024-06-18 09:41

Platform

win7-20240419-en

Max time kernel

145s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.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\sainbox.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\sainbox.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\sainbox.exe N/A
N/A N/A C:\Windows\SysWOW64\sainbox.exe N/A

Loads dropped DLL

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.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\Cookies\CachePrefix = "Cookie:" C:\Windows\SysWOW64\sainbox.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" C:\Windows\SysWOW64\sainbox.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings C:\Windows\SysWOW64\sainbox.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix C:\Windows\SysWOW64\sainbox.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\sainbox.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\sainbox.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\sainbox.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\sainbox.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\sainbox.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\sainbox.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2396 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe C:\Windows\SysWOW64\cmd.exe
PID 2396 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe C:\Windows\SysWOW64\cmd.exe
PID 2396 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe C:\Windows\SysWOW64\cmd.exe
PID 2396 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe C:\Windows\SysWOW64\cmd.exe
PID 2572 wrote to memory of 3040 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2572 wrote to memory of 3040 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2572 wrote to memory of 3040 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2572 wrote to memory of 3040 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2628 wrote to memory of 2604 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2628 wrote to memory of 2604 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2628 wrote to memory of 2604 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2628 wrote to memory of 2604 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe

"C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe"

C:\Windows\SysWOW64\sainbox.exe

C:\Windows\SysWOW64\sainbox.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\1FB878~1.EXE > nul

C:\Windows\SysWOW64\sainbox.exe

C:\Windows\SysWOW64\sainbox.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 123.99.198.130:12822 456418.e3.luyouxia.net tcp
CN 123.99.198.130:12822 456418.e3.luyouxia.net tcp
CN 123.99.198.130:12822 456418.e3.luyouxia.net tcp
US 8.8.8.8:53 456418.e3.luyouxia.net udp
CN 115.231.218.42:12822 456418.e3.luyouxia.net tcp

Files

memory/2396-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 e2ec5d5e75650aad1237c7e164ff0d69
SHA1 f2c190494f8599de726abf38e42caa5a7d9da6db
SHA256 1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc
SHA512 8223a225a8f82474c876abeae34ee0bab4a213c6e361a6409fcb75095f87fdc776123be9d0605cff1f626e97f2c322a476488526f4816e05c5da0096a34a6bcd

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-18 09:38

Reported

2024-06-18 09:41

Platform

win10v2004-20240508-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.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\sainbox.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\sainbox.exe N/A

Executes dropped EXE

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.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\sainbox.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" C:\Windows\SysWOW64\sainbox.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" C:\Windows\SysWOW64\sainbox.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\sainbox.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\sainbox.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\sainbox.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\sainbox.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\sainbox.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\sainbox.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe

"C:\Users\Admin\AppData\Local\Temp\1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc.exe"

C:\Windows\SysWOW64\sainbox.exe

C:\Windows\SysWOW64\sainbox.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\1FB878~1.EXE > nul

C:\Windows\SysWOW64\sainbox.exe

C:\Windows\SysWOW64\sainbox.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 23.53.113.159:80 tcp
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/1664-1-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 e2ec5d5e75650aad1237c7e164ff0d69
SHA1 f2c190494f8599de726abf38e42caa5a7d9da6db
SHA256 1fb878f8723c96377de6fb0d239794470d436023cbaf3472ea8ed16637d0f9bc
SHA512 8223a225a8f82474c876abeae34ee0bab4a213c6e361a6409fcb75095f87fdc776123be9d0605cff1f626e97f2c322a476488526f4816e05c5da0096a34a6bcd

memory/4444-10-0x0000000010000000-0x000000001019F000-memory.dmp

memory/4936-17-0x0000000010000000-0x000000001019F000-memory.dmp