Malware Analysis Report

2025-08-10 17:53

Sample ID 230822-3t9tgagc96
Target a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e
SHA256 a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e
Tags
gh0strat purplefox persistence rat rootkit trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e

Threat Level: Known bad

The file a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

PurpleFox

Detect PurpleFox Rootkit

Gh0st RAT payload

Gh0strat

Sets service image path in registry

Drops file in Drivers directory

Executes dropped EXE

Deletes itself

Drops file in System32 directory

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: LoadsDriver

Suspicious use of AdjustPrivilegeToken

Runs ping.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-08-22 23:49

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-22 23:49

Reported

2023-08-22 23:52

Platform

win7-20230712-en

Max time kernel

149s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.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\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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.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\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.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 2636 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.exe C:\Windows\SysWOW64\cmd.exe
PID 2636 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.exe C:\Windows\SysWOW64\cmd.exe
PID 2636 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.exe C:\Windows\SysWOW64\cmd.exe
PID 2636 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.exe C:\Windows\SysWOW64\cmd.exe
PID 1716 wrote to memory of 2584 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 1716 wrote to memory of 2584 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 1716 wrote to memory of 2584 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 1716 wrote to memory of 2584 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2568 wrote to memory of 2792 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2568 wrote to memory of 2792 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2568 wrote to memory of 2792 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2568 wrote to memory of 2792 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.exe

"C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.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\A4BAD7~1.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 6x514937w5.goho.co udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 6x514937w5.goho.co udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 6x514937w5.goho.co udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp

Files

memory/2636-53-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 77067942cb7b5515dada10fcba8a34ac
SHA1 580b6cc3a37bd19081ffe8885dbc5613fb74a24f
SHA256 a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e
SHA512 08829b2f5d94cfb9335df65fe38aa45fc5e8b39e26dc31f35f635956906f678960ba87a7b5f17fd6df0a3ece3efe809247638c20c2fbfd495c8b180d7d42e5f6

C:\Windows\SysWOW64\sainbox.exe

MD5 77067942cb7b5515dada10fcba8a34ac
SHA1 580b6cc3a37bd19081ffe8885dbc5613fb74a24f
SHA256 a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e
SHA512 08829b2f5d94cfb9335df65fe38aa45fc5e8b39e26dc31f35f635956906f678960ba87a7b5f17fd6df0a3ece3efe809247638c20c2fbfd495c8b180d7d42e5f6

memory/2584-70-0x0000000010000000-0x000000001019F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-22 23:49

Reported

2023-08-22 23:52

Platform

win10v2004-20230703-en

Max time kernel

149s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.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\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 opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.exe N/A
File created C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.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\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.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\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.exe

"C:\Users\Admin\AppData\Local\Temp\a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e.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\A4BAD7~1.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 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 6x514937w5.goho.co udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 126.154.241.8.in-addr.arpa udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 6x514937w5.goho.co udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 73.254.224.20.in-addr.arpa udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 6x514937w5.goho.co udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp
US 8.8.8.8:53 252.15.104.51.in-addr.arpa udp
US 8.8.8.8:53 6x514937w5.goho.co udp
CN 115.236.153.172:43879 6x514937w5.goho.co tcp

Files

memory/2812-133-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 77067942cb7b5515dada10fcba8a34ac
SHA1 580b6cc3a37bd19081ffe8885dbc5613fb74a24f
SHA256 a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e
SHA512 08829b2f5d94cfb9335df65fe38aa45fc5e8b39e26dc31f35f635956906f678960ba87a7b5f17fd6df0a3ece3efe809247638c20c2fbfd495c8b180d7d42e5f6

C:\Windows\SysWOW64\sainbox.exe

MD5 77067942cb7b5515dada10fcba8a34ac
SHA1 580b6cc3a37bd19081ffe8885dbc5613fb74a24f
SHA256 a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e
SHA512 08829b2f5d94cfb9335df65fe38aa45fc5e8b39e26dc31f35f635956906f678960ba87a7b5f17fd6df0a3ece3efe809247638c20c2fbfd495c8b180d7d42e5f6

memory/2212-143-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 77067942cb7b5515dada10fcba8a34ac
SHA1 580b6cc3a37bd19081ffe8885dbc5613fb74a24f
SHA256 a4bad7812fbae76f1d1827fe6c544f4843ae7711d9053c6e49f2d8a1e03e4c0e
SHA512 08829b2f5d94cfb9335df65fe38aa45fc5e8b39e26dc31f35f635956906f678960ba87a7b5f17fd6df0a3ece3efe809247638c20c2fbfd495c8b180d7d42e5f6