Malware Analysis Report

2024-09-22 15:15

Sample ID 240529-sql8wsba84
Target b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00
SHA256 b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00
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

b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00

Threat Level: Known bad

The file b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00 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

Deletes itself

Loads dropped DLL

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Runs ping.exe

Suspicious behavior: LoadsDriver

Modifies data under HKEY_USERS

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-05-29 15:19

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-29 15:19

Reported

2024-05-29 15:22

Platform

win7-20240508-en

Max time kernel

146s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.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\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.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\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
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

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\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.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 2232 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.exe C:\Windows\SysWOW64\cmd.exe
PID 2232 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.exe C:\Windows\SysWOW64\cmd.exe
PID 2232 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.exe C:\Windows\SysWOW64\cmd.exe
PID 2232 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.exe C:\Windows\SysWOW64\cmd.exe
PID 2284 wrote to memory of 2716 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2284 wrote to memory of 2716 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2284 wrote to memory of 2716 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2284 wrote to memory of 2716 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2344 wrote to memory of 2712 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2344 wrote to memory of 2712 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2344 wrote to memory of 2712 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2344 wrote to memory of 2712 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.exe

"C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.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\B9E92B~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 hedy1026.e1.luyouxia.net udp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp

Files

memory/2232-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 b9dd72244170c5672bb7ad4e6f4056b9
SHA1 779bceced7259c82068c56befc8778bd0fcf5caf
SHA256 b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00
SHA512 312e39c2114ee8e4d0c5d769cf439f3fd068da62fb7fc3f4c41510c41ba7e49b62a07a19013f5d323e41b2fe960ae6bf3c3e20683e89f10da3b2614f9db47b22

memory/2716-19-0x0000000010000000-0x000000001019F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-29 15:19

Reported

2024-05-29 15:22

Platform

win10v2004-20240508-en

Max time kernel

148s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.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\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.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\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.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\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.exe

"C:\Users\Admin\AppData\Local\Temp\b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00.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\B9E92B~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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 hedy1026.e1.luyouxia.net udp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
US 8.8.8.8:53 144.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
NL 23.62.61.72:443 www.bing.com tcp
US 8.8.8.8:53 72.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
US 8.8.8.8:53 58.99.105.20.in-addr.arpa udp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
US 8.8.8.8:53 202.131.50.23.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
CN 123.99.198.201:22293 hedy1026.e1.luyouxia.net tcp
US 8.8.8.8:53 15.173.189.20.in-addr.arpa udp

Files

memory/4384-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 b9dd72244170c5672bb7ad4e6f4056b9
SHA1 779bceced7259c82068c56befc8778bd0fcf5caf
SHA256 b9e92b710ca8ed56d9038c1f7a9ef534267cc4a089773c0129ba56b38e479b00
SHA512 312e39c2114ee8e4d0c5d769cf439f3fd068da62fb7fc3f4c41510c41ba7e49b62a07a19013f5d323e41b2fe960ae6bf3c3e20683e89f10da3b2614f9db47b22

memory/2344-11-0x0000000010000000-0x000000001019F000-memory.dmp

memory/2364-18-0x0000000010000000-0x000000001019F000-memory.dmp