Malware Analysis Report

2025-08-06 03:55

Sample ID 230828-qr2nvseb5s
Target f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90
SHA256 f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90
Tags
purplefox persistence 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

f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90

Threat Level: Known bad

The file f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90 was found to be: Known bad.

Malicious Activity Summary

purplefox persistence rootkit trojan

Detect PurpleFox Rootkit

PurpleFox

Sets service image path in registry

Drops file in Drivers directory

Executes dropped EXE

Deletes itself

Enumerates connected drives

Drops file in Windows directory

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Runs ping.exe

Suspicious behavior: LoadsDriver

Modifies data under HKEY_USERS

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-08-28 13:30

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-28 13:30

Reported

2023-08-28 13:33

Platform

win7-20230712-en

Max time kernel

119s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe"

Signatures

Detect PurpleFox Rootkit

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

PurpleFox

rootkit trojan purplefox

Drops file in Drivers directory

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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\J: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\N: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\S: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\V: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\W: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\B: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\I: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\T: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\X: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\E: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\K: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\O: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\P: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\Q: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\R: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\Z: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\H: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\M: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\U: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\Y: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\G: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\L: C:\Windows\Aqiyq.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Aqiyq.exe C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe N/A
File opened for modification C:\Windows\Aqiyq.exe C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie C:\Windows\Aqiyq.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie\devenum\Version = "7" C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings C:\Windows\Aqiyq.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie\devenum C:\Windows\Aqiyq.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 C:\Windows\Aqiyq.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0" C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software C:\Windows\Aqiyq.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\Aqiyq.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\Aqiyq.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe

"C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe"

C:\Windows\Aqiyq.exe

C:\Windows\Aqiyq.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\F25114~1.EXE > nul

C:\Windows\Aqiyq.exe

C:\Windows\Aqiyq.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 aaaa1688.e1.luyouxia.net udp
CN 123.99.198.201:22154 aaaa1688.e1.luyouxia.net tcp

Files

memory/2672-0-0x0000000010000000-0x00000000101B0000-memory.dmp

C:\Windows\Aqiyq.exe

MD5 c90ab34fbac37c0b09dc5dea5818d803
SHA1 028394346e783de10ea614d9d07cad27b75188f3
SHA256 f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90
SHA512 8e83bd188a4f1e5eb783b99545d1c26fda557ac167c5b2c0fecb2d01c198e44ffd3938215c692a71ee3a3f6d0a327f929eed0b93a2ce578d8a3a946c56c0ee49

C:\Windows\Aqiyq.exe

MD5 c90ab34fbac37c0b09dc5dea5818d803
SHA1 028394346e783de10ea614d9d07cad27b75188f3
SHA256 f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90
SHA512 8e83bd188a4f1e5eb783b99545d1c26fda557ac167c5b2c0fecb2d01c198e44ffd3938215c692a71ee3a3f6d0a327f929eed0b93a2ce578d8a3a946c56c0ee49

C:\Windows\Aqiyq.exe

MD5 c90ab34fbac37c0b09dc5dea5818d803
SHA1 028394346e783de10ea614d9d07cad27b75188f3
SHA256 f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90
SHA512 8e83bd188a4f1e5eb783b99545d1c26fda557ac167c5b2c0fecb2d01c198e44ffd3938215c692a71ee3a3f6d0a327f929eed0b93a2ce578d8a3a946c56c0ee49

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-28 13:30

Reported

2023-08-28 13:33

Platform

win10v2004-20230703-en

Max time kernel

143s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.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

PurpleFox

rootkit trojan purplefox

Drops file in Drivers directory

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

Executes dropped EXE

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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\V: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\Z: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\E: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\H: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\J: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\K: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\O: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\S: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\L: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\N: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\Y: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\G: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\P: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\R: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\X: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\W: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\B: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\I: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\M: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\Q: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\T: C:\Windows\Aqiyq.exe N/A
File opened (read-only) \??\U: C:\Windows\Aqiyq.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Aqiyq.exe C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe N/A
File opened for modification C:\Windows\Aqiyq.exe C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft C:\Windows\Aqiyq.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie C:\Windows\Aqiyq.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7" C:\Windows\Aqiyq.exe N/A

Runs ping.exe

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

Suspicious behavior: EnumeratesProcesses

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

Suspicious behavior: LoadsDriver

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\Aqiyq.exe N/A
Token: 33 N/A C:\Windows\Aqiyq.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\Aqiyq.exe N/A
Token: 33 N/A C:\Windows\Aqiyq.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\Aqiyq.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe

"C:\Users\Admin\AppData\Local\Temp\f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90.exe"

C:\Windows\Aqiyq.exe

C:\Windows\Aqiyq.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\F25114~1.EXE > nul

C:\Windows\Aqiyq.exe

C:\Windows\Aqiyq.exe -acsi

C:\Windows\SysWOW64\PING.EXE

ping -n 2 127.0.0.1

Network

Country Destination Domain Proto
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 254.1.248.8.in-addr.arpa udp
US 8.8.8.8:53 aaaa1688.e1.luyouxia.net udp
CN 123.99.198.201:22154 aaaa1688.e1.luyouxia.net tcp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 201.198.99.123.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 7.173.189.20.in-addr.arpa udp

Files

memory/1920-0-0x0000000010000000-0x00000000101B0000-memory.dmp

C:\Windows\Aqiyq.exe

MD5 c90ab34fbac37c0b09dc5dea5818d803
SHA1 028394346e783de10ea614d9d07cad27b75188f3
SHA256 f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90
SHA512 8e83bd188a4f1e5eb783b99545d1c26fda557ac167c5b2c0fecb2d01c198e44ffd3938215c692a71ee3a3f6d0a327f929eed0b93a2ce578d8a3a946c56c0ee49

C:\Windows\Aqiyq.exe

MD5 c90ab34fbac37c0b09dc5dea5818d803
SHA1 028394346e783de10ea614d9d07cad27b75188f3
SHA256 f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90
SHA512 8e83bd188a4f1e5eb783b99545d1c26fda557ac167c5b2c0fecb2d01c198e44ffd3938215c692a71ee3a3f6d0a327f929eed0b93a2ce578d8a3a946c56c0ee49

memory/2944-11-0x0000000010000000-0x00000000101B0000-memory.dmp

C:\Windows\Aqiyq.exe

MD5 c90ab34fbac37c0b09dc5dea5818d803
SHA1 028394346e783de10ea614d9d07cad27b75188f3
SHA256 f25114b40c3e55e9bd38866e50aba6622ee140fff1e616010c5e48527d140f90
SHA512 8e83bd188a4f1e5eb783b99545d1c26fda557ac167c5b2c0fecb2d01c198e44ffd3938215c692a71ee3a3f6d0a327f929eed0b93a2ce578d8a3a946c56c0ee49

memory/3868-19-0x0000000010000000-0x00000000101B0000-memory.dmp