Malware Analysis Report

2024-12-07 13:57

Sample ID 241118-fqxneatqer
Target 37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3
SHA256 37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3
Tags
upx gh0strat purplefox discovery 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

37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3

Threat Level: Known bad

The file 37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3 was found to be: Known bad.

Malicious Activity Summary

upx gh0strat purplefox discovery persistence rat rootkit trojan

Gh0st RAT payload

Gh0strat family

PurpleFox

Detect PurpleFox Rootkit

Purplefox family

Gh0strat

Sets service image path in registry

Drops file in Drivers directory

Executes dropped EXE

Loads dropped DLL

Deletes itself

UPX packed file

Drops file in System32 directory

System Location Discovery: System Language Discovery

Unsigned PE

System Network Configuration Discovery: Internet Connection Discovery

Suspicious behavior: LoadsDriver

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Runs ping.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-18 05:05

Signatures

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-18 05:05

Reported

2024-11-18 05:07

Platform

win7-20241010-en

Max time kernel

146s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.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
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
N/A N/A N/A N/A
N/A N/A N/A N/A

Gh0strat

rat gh0strat

Gh0strat family

gh0strat

PurpleFox

rootkit trojan purplefox

Purplefox family

purplefox

Drops file in Drivers directory

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

Loads dropped DLL

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\svhsot.exe C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe N/A
File opened for modification C:\Windows\SysWOW64\svhsot.exe C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe N/A

UPX packed file

upx
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
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\PING.EXE N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\svhsot.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\svhsot.exe N/A

System Network Configuration Discovery: Internet Connection Discovery

discovery
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\PING.EXE N/A
N/A N/A C:\Windows\SysWOW64\cmd.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\svhsot.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\svhsot.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\svhsot.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\svhsot.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\svhsot.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\svhsot.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2568 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe C:\Windows\SysWOW64\cmd.exe
PID 2568 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe C:\Windows\SysWOW64\cmd.exe
PID 2568 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe C:\Windows\SysWOW64\cmd.exe
PID 2568 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe C:\Windows\SysWOW64\cmd.exe
PID 1796 wrote to memory of 2528 N/A C:\Windows\SysWOW64\svhsot.exe C:\Windows\SysWOW64\svhsot.exe
PID 1796 wrote to memory of 2528 N/A C:\Windows\SysWOW64\svhsot.exe C:\Windows\SysWOW64\svhsot.exe
PID 1796 wrote to memory of 2528 N/A C:\Windows\SysWOW64\svhsot.exe C:\Windows\SysWOW64\svhsot.exe
PID 1796 wrote to memory of 2528 N/A C:\Windows\SysWOW64\svhsot.exe C:\Windows\SysWOW64\svhsot.exe
PID 1980 wrote to memory of 2920 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 1980 wrote to memory of 2920 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 1980 wrote to memory of 2920 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 1980 wrote to memory of 2920 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe

"C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe"

C:\Windows\SysWOW64\svhsot.exe

C:\Windows\SysWOW64\svhsot.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\37B600~1.EXE > nul

C:\Windows\SysWOW64\svhsot.exe

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

C:\Windows\SysWOW64\PING.EXE

ping -n 2 127.0.0.1

Network

Country Destination Domain Proto
US 8.8.8.8:53 010.ydns.eu udp
HK 45.125.32.240:18089 010.ydns.eu tcp
HK 45.125.32.240:18089 010.ydns.eu tcp
HK 45.125.32.240:18089 010.ydns.eu tcp
HK 45.125.32.240:18089 010.ydns.eu tcp
HK 45.125.32.240:18089 010.ydns.eu tcp
HK 45.125.32.240:18089 010.ydns.eu tcp
HK 45.125.32.240:18089 010.ydns.eu tcp

Files

memory/2528-24-0x0000000010000000-0x000000001019F000-memory.dmp

memory/2568-20-0x0000000000400000-0x000000000057D000-memory.dmp

C:\Windows\SysWOW64\svhsot.exe

MD5 41850422e4c7395319095a38924a4feb
SHA1 6a04170a1dcebc26ab237c711511eadbe7e43e75
SHA256 37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3
SHA512 0d9d8d8dcb42110bafc7eec8bfec217e3f16501079cfb6532096f46615aa7e113229e868a393406686b0e98eba7bf332e561be432f8387a703b46c87c23bb791

memory/1796-22-0x0000000000400000-0x000000000057D000-memory.dmp

memory/1796-10-0x0000000000400000-0x000000000057D000-memory.dmp

memory/2568-2-0x0000000010000000-0x000000001019F000-memory.dmp

memory/2568-0-0x0000000000400000-0x000000000057D000-memory.dmp

memory/2528-40-0x0000000000400000-0x000000000057D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-18 05:05

Reported

2024-11-18 05:07

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.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
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
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

Gh0strat family

gh0strat

PurpleFox

rootkit trojan purplefox

Purplefox family

purplefox

Drops file in Drivers directory

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

Executes dropped EXE

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\svhsot.exe C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe N/A
File opened for modification C:\Windows\SysWOW64\svhsot.exe C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe N/A

UPX packed file

upx
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
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\svhsot.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\svhsot.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\PING.EXE N/A

System Network Configuration Discovery: Internet Connection Discovery

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\svhsot.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\svhsot.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\svhsot.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\svhsot.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\svhsot.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe

"C:\Users\Admin\AppData\Local\Temp\37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3.exe"

C:\Windows\SysWOW64\svhsot.exe

C:\Windows\SysWOW64\svhsot.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\37B600~1.EXE > nul

C:\Windows\SysWOW64\svhsot.exe

C:\Windows\SysWOW64\svhsot.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 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 010.ydns.eu udp
HK 38.6.164.159:18089 010.ydns.eu tcp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
HK 38.6.164.159:18089 010.ydns.eu tcp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
HK 38.6.164.159:18089 010.ydns.eu tcp
HK 38.6.164.159:18089 010.ydns.eu tcp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
HK 38.6.164.159:18089 010.ydns.eu tcp
HK 38.6.164.159:18089 010.ydns.eu tcp
HK 38.6.164.159:18089 010.ydns.eu tcp
US 8.8.8.8:53 10.179.89.13.in-addr.arpa udp

Files

memory/872-0-0x0000000000400000-0x000000000057D000-memory.dmp

memory/872-1-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\svhsot.exe

MD5 41850422e4c7395319095a38924a4feb
SHA1 6a04170a1dcebc26ab237c711511eadbe7e43e75
SHA256 37b6002732a56eaa5782a94aedd6fbd6f5b2f404d4110f614f1b2d9d85b6b2f3
SHA512 0d9d8d8dcb42110bafc7eec8bfec217e3f16501079cfb6532096f46615aa7e113229e868a393406686b0e98eba7bf332e561be432f8387a703b46c87c23bb791

memory/1408-11-0x0000000010000000-0x000000001019F000-memory.dmp

memory/4912-21-0x0000000000400000-0x000000000057D000-memory.dmp

memory/872-19-0x0000000000400000-0x000000000057D000-memory.dmp

memory/1408-22-0x0000000000400000-0x000000000057D000-memory.dmp

memory/4912-23-0x0000000010000000-0x000000001019F000-memory.dmp

memory/4912-38-0x0000000000400000-0x000000000057D000-memory.dmp