Malware Analysis Report

2025-01-02 15:24

Sample ID 240524-t5z9qscb6x
Target 127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13
SHA256 127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13

Threat Level: Known bad

The file 127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13 was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

Gh0strat

Detect PurpleFox Rootkit

Gh0st RAT payload

PurpleFox

Sets service image path in registry

Drops file in Drivers directory

Executes dropped EXE

Deletes itself

Loads dropped DLL

Drops file in System32 directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Modifies data under HKEY_USERS

Suspicious use of WriteProcessMemory

Runs ping.exe

Suspicious behavior: LoadsDriver

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-24 16:39

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-24 16:39

Reported

2024-05-24 16:41

Platform

win10v2004-20240508-en

Max time kernel

145s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.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\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.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\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.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\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe

"C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.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\127AF2~1.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 --field-trial-handle=4320,i,13879737908471496610,15335851594401413307,262144 --variations-seed-version --mojo-platform-channel-handle=1416 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 zc265352732.e2.luyouxia.net udp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 107.211.222.173.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
US 8.8.8.8:53 tse1.mm.bing.net 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 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp

Files

memory/3004-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 d477752188fc25daf98355c34defd830
SHA1 e3b95fb1fb84daddf36fda1efa5869380ec7fa1f
SHA256 127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13
SHA512 6b7ed6607d821d290b25461226f8394cef193470cdcb115805f6d5e571f763e754bf48388087fa0638043529b4a20e2dfdde46d77df92c170c2567dc1ef2cc9c

memory/3416-10-0x0000000010000000-0x000000001019F000-memory.dmp

memory/5004-17-0x0000000010000000-0x000000001019F000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-24 16:39

Reported

2024-05-24 16:41

Platform

win7-20240220-en

Max time kernel

146s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe"

Signatures

Detect PurpleFox Rootkit

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

Gh0st RAT payload

Description Indicator Process Target
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\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
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
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\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.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 2208 wrote to memory of 2220 N/A C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe C:\Windows\SysWOW64\cmd.exe
PID 2208 wrote to memory of 2220 N/A C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe C:\Windows\SysWOW64\cmd.exe
PID 2208 wrote to memory of 2220 N/A C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe C:\Windows\SysWOW64\cmd.exe
PID 2208 wrote to memory of 2220 N/A C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe C:\Windows\SysWOW64\cmd.exe
PID 2252 wrote to memory of 2532 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2252 wrote to memory of 2532 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2252 wrote to memory of 2532 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2252 wrote to memory of 2532 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2220 wrote to memory of 2624 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2220 wrote to memory of 2624 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2220 wrote to memory of 2624 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2220 wrote to memory of 2624 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.exe

"C:\Users\Admin\AppData\Local\Temp\127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13.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\127AF2~1.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 zc265352732.e2.luyouxia.net udp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp
CN 123.99.198.201:21199 zc265352732.e2.luyouxia.net tcp

Files

memory/2208-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 d477752188fc25daf98355c34defd830
SHA1 e3b95fb1fb84daddf36fda1efa5869380ec7fa1f
SHA256 127af22f8bd5e06e59c4cc025c5577cb649aed8747cda672c864fee01aad3d13
SHA512 6b7ed6607d821d290b25461226f8394cef193470cdcb115805f6d5e571f763e754bf48388087fa0638043529b4a20e2dfdde46d77df92c170c2567dc1ef2cc9c