Malware Analysis Report

2025-01-02 15:24

Sample ID 240524-t9t9aacg88
Target ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506
SHA256 ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506
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

ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506

Threat Level: Known bad

The file ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506 was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

PurpleFox

Gh0strat

Detect PurpleFox Rootkit

Gh0st RAT payload

Drops file in Drivers directory

Sets service image path in registry

Loads dropped DLL

Executes dropped EXE

Deletes itself

Drops file in System32 directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: LoadsDriver

Suspicious use of WriteProcessMemory

Modifies data under HKEY_USERS

Runs ping.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-24 16:45

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-24 16:45

Reported

2024-05-24 16:48

Platform

win7-20240221-en

Max time kernel

146s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.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\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.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
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings 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\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.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 2008 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.exe C:\Windows\SysWOW64\cmd.exe
PID 2008 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.exe C:\Windows\SysWOW64\cmd.exe
PID 2008 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.exe C:\Windows\SysWOW64\cmd.exe
PID 2008 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.exe C:\Windows\SysWOW64\cmd.exe
PID 2832 wrote to memory of 2536 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2832 wrote to memory of 2536 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2832 wrote to memory of 2536 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2832 wrote to memory of 2536 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2556 wrote to memory of 2592 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2556 wrote to memory of 2592 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2556 wrote to memory of 2592 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2556 wrote to memory of 2592 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.exe

"C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.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\BA699E~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 lsy1275.u1.luyouxia.net udp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp

Files

memory/2008-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 18cfb21212f6a3356d5685fdf2c43da8
SHA1 ee69992996a79696f845370b0293fc11f9990c81
SHA256 ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506
SHA512 1042b8a3a42126f991d66de20175500d651e3b16922cdbcd7fc27af48225730ddec48d103f9097206690ae5fdc94342253ff30199eb7161699f84b41352dc9be

memory/2536-18-0x0000000010000000-0x000000001019F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-24 16:45

Reported

2024-05-24 16:48

Platform

win10v2004-20240226-en

Max time kernel

152s

Max time network

158s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.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\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.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\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
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix 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\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.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\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.exe

"C:\Users\Admin\AppData\Local\Temp\ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506.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\BA699E~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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4340 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 lsy1275.u1.luyouxia.net udp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
US 8.8.8.8:53 107.211.222.173.in-addr.arpa udp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp
US 8.8.8.8:53 72.239.69.13.in-addr.arpa udp
CN 123.99.198.201:50257 lsy1275.u1.luyouxia.net tcp

Files

memory/636-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 18cfb21212f6a3356d5685fdf2c43da8
SHA1 ee69992996a79696f845370b0293fc11f9990c81
SHA256 ba699e77a856fe703bfdbccf0e354bc83620d70b230b9faf4476dad13615d506
SHA512 1042b8a3a42126f991d66de20175500d651e3b16922cdbcd7fc27af48225730ddec48d103f9097206690ae5fdc94342253ff30199eb7161699f84b41352dc9be

memory/2756-10-0x0000000010000000-0x000000001019F000-memory.dmp

memory/4572-17-0x0000000010000000-0x000000001019F000-memory.dmp