Malware Analysis Report

2024-09-22 14:59

Sample ID 240616-mcbx4stbrn
Target eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468
SHA256 eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468
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

eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468

Threat Level: Known bad

The file eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468 was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

Detect PurpleFox Rootkit

Gh0strat

Gh0st RAT payload

PurpleFox

Sets service image path in registry

Drops file in Drivers directory

Loads dropped DLL

Deletes itself

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Suspicious behavior: LoadsDriver

Suspicious use of WriteProcessMemory

Runs ping.exe

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-16 10:18

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-16 10:18

Reported

2024-06-16 10:21

Platform

win7-20240611-en

Max time kernel

146s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.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

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\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.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\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.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 2244 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.exe C:\Windows\SysWOW64\cmd.exe
PID 2244 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.exe C:\Windows\SysWOW64\cmd.exe
PID 2244 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.exe C:\Windows\SysWOW64\cmd.exe
PID 2244 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.exe C:\Windows\SysWOW64\cmd.exe
PID 3048 wrote to memory of 2792 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 3048 wrote to memory of 2792 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 3048 wrote to memory of 2792 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 3048 wrote to memory of 2792 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2404 wrote to memory of 1096 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2404 wrote to memory of 1096 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2404 wrote to memory of 1096 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2404 wrote to memory of 1096 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.exe

"C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.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\EB9900~1.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 qwe6368.e1.luyouxia.net udp
CN 123.99.198.201:2319 qwe6368.e1.luyouxia.net tcp
CN 123.99.198.201:2319 qwe6368.e1.luyouxia.net tcp
CN 123.99.198.201:2319 qwe6368.e1.luyouxia.net tcp
CN 123.99.198.201:2319 qwe6368.e1.luyouxia.net tcp
CN 123.99.198.201:2319 qwe6368.e1.luyouxia.net tcp
CN 123.99.198.201:2319 qwe6368.e1.luyouxia.net tcp
CN 123.99.198.201:2319 qwe6368.e1.luyouxia.net tcp

Files

memory/2244-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 34ad367bddc3ccef69c375f87d7ab200
SHA1 18a11a0b4c809ad309b05cf0c66b527ae46f4baa
SHA256 eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468
SHA512 6dfc7c72b2b4c2e4f35acede750c19ab761be86a7763edfd4d41a5929e5ef1ad411ff42647befd57ef43582367ebb3b162cee6cdd3d4b5218db351c8e5357a2a

memory/2792-19-0x0000000010000000-0x000000001019F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-16 10:18

Reported

2024-06-16 10:21

Platform

win10v2004-20240508-en

Max time kernel

142s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.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 opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.exe N/A
File created C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.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\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.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\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.exe

"C:\Users\Admin\AppData\Local\Temp\eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468.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\EB9900~1.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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp
US 8.8.8.8:53 qwe6368.e1.luyouxia.net udp

Files

memory/3112-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 34ad367bddc3ccef69c375f87d7ab200
SHA1 18a11a0b4c809ad309b05cf0c66b527ae46f4baa
SHA256 eb990076712782d8be8bfd52d94585f6e2e6d86d53c2ecff28036f48b629b468
SHA512 6dfc7c72b2b4c2e4f35acede750c19ab761be86a7763edfd4d41a5929e5ef1ad411ff42647befd57ef43582367ebb3b162cee6cdd3d4b5218db351c8e5357a2a

memory/5072-11-0x0000000010000000-0x000000001019F000-memory.dmp

memory/4496-18-0x0000000010000000-0x000000001019F000-memory.dmp