Malware Analysis Report

2024-09-22 15:12

Sample ID 240604-blws4agg72
Target 364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe
SHA256 364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7
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

364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7

Threat Level: Known bad

The file 364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

PurpleFox

Gh0strat

Detect PurpleFox Rootkit

Gh0st RAT payload

Detects executables calling ClearMyTracksByProcess

Drops file in Drivers directory

Sets service image path in registry

Deletes itself

Loads dropped DLL

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Runs ping.exe

Suspicious use of WriteProcessMemory

Suspicious behavior: LoadsDriver

Modifies data under HKEY_USERS

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-04 01:14

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-04 01:14

Reported

2024-06-04 01:17

Platform

win7-20240508-en

Max time kernel

145s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.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
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Gh0strat

rat gh0strat

PurpleFox

rootkit trojan purplefox

Detects executables calling ClearMyTracksByProcess

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

Drops file in Drivers directory

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

Loads dropped DLL

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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Meume.exe C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe N/A
File created C:\Windows\SysWOW64\Meume.exe C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.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\Meume.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix C:\Windows\SysWOW64\Meume.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" C:\Windows\SysWOW64\Meume.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" C:\Windows\SysWOW64\Meume.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\Meume.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Meume.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Meume.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Meume.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Meume.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Meume.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2716 wrote to memory of 2128 N/A C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe C:\Windows\SysWOW64\cmd.exe
PID 2716 wrote to memory of 2128 N/A C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe C:\Windows\SysWOW64\cmd.exe
PID 2716 wrote to memory of 2128 N/A C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe C:\Windows\SysWOW64\cmd.exe
PID 2716 wrote to memory of 2128 N/A C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe C:\Windows\SysWOW64\cmd.exe
PID 1700 wrote to memory of 2648 N/A C:\Windows\SysWOW64\Meume.exe C:\Windows\SysWOW64\Meume.exe
PID 1700 wrote to memory of 2648 N/A C:\Windows\SysWOW64\Meume.exe C:\Windows\SysWOW64\Meume.exe
PID 1700 wrote to memory of 2648 N/A C:\Windows\SysWOW64\Meume.exe C:\Windows\SysWOW64\Meume.exe
PID 1700 wrote to memory of 2648 N/A C:\Windows\SysWOW64\Meume.exe C:\Windows\SysWOW64\Meume.exe
PID 2128 wrote to memory of 2788 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2128 wrote to memory of 2788 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2128 wrote to memory of 2788 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2128 wrote to memory of 2788 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe

"C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe"

C:\Windows\SysWOW64\Meume.exe

C:\Windows\SysWOW64\Meume.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\364B08~1.EXE > nul

C:\Windows\SysWOW64\Meume.exe

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

C:\Windows\SysWOW64\PING.EXE

ping -n 2 127.0.0.1

Network

Country Destination Domain Proto
CN 82.157.201.41:8080 tcp
CN 82.157.201.41:8080 tcp
CN 82.157.201.41:8080 tcp
CN 82.157.201.41:8080 tcp
CN 82.157.201.41:8080 tcp
CN 82.157.201.41:8080 tcp
CN 82.157.201.41:8080 tcp

Files

memory/2716-0-0x0000000000400000-0x00000000005B8000-memory.dmp

memory/2716-1-0x0000000000020000-0x0000000000021000-memory.dmp

memory/2716-2-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\Meume.exe

MD5 3311b8c3707f75831aa443db406c71e0
SHA1 ad5ebc62c45287e67febc164b7b7b876b82b6a5d
SHA256 364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7
SHA512 86cc39e7c4b82f03d0f4b3f2d7021626b7294c0ec909152a457f73ce829923934daae696ffd5306edde43f807f1ed35261e25093e47c8645a5d37317ec87c19f

memory/1700-11-0x0000000000400000-0x00000000005B8000-memory.dmp

memory/2716-19-0x0000000000400000-0x00000000005B8000-memory.dmp

memory/2648-23-0x0000000000020000-0x0000000000021000-memory.dmp

memory/2648-22-0x0000000000400000-0x00000000005B8000-memory.dmp

memory/1700-30-0x0000000000400000-0x00000000005B8000-memory.dmp

memory/2648-41-0x0000000000020000-0x0000000000021000-memory.dmp

memory/2648-40-0x0000000000400000-0x00000000005B8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-04 01:14

Reported

2024-06-04 01:17

Platform

win10v2004-20240426-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.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
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Gh0st RAT payload

Description Indicator Process Target
N/A N/A N/A N/A
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Gh0strat

rat gh0strat

PurpleFox

rootkit trojan purplefox

Detects executables calling ClearMyTracksByProcess

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

Drops file in Drivers directory

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

Executes dropped EXE

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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Meume.exe C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe N/A
File created C:\Windows\SysWOW64\Meume.exe C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.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\Meume.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" C:\Windows\SysWOW64\Meume.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" C:\Windows\SysWOW64\Meume.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\Meume.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Meume.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Meume.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Meume.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Meume.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Meume.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe

"C:\Users\Admin\AppData\Local\Temp\364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7.exe"

C:\Windows\SysWOW64\Meume.exe

C:\Windows\SysWOW64\Meume.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\364B08~1.EXE > nul

C:\Windows\SysWOW64\Meume.exe

C:\Windows\SysWOW64\Meume.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
CN 82.157.201.41:8080 tcp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 34.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
CN 82.157.201.41:8080 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
CN 82.157.201.41:8080 tcp
US 8.8.8.8:53 99.58.20.217.in-addr.arpa udp
CN 82.157.201.41:8080 tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
CN 82.157.201.41:8080 tcp
CN 82.157.201.41:8080 tcp
CN 82.157.201.41:8080 tcp
US 8.8.8.8:53 udp

Files

memory/1476-0-0x0000000000400000-0x00000000005B8000-memory.dmp

memory/1476-1-0x00000000001C0000-0x00000000001DB000-memory.dmp

memory/1476-3-0x0000000010000000-0x000000001019F000-memory.dmp

memory/1920-13-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/1920-12-0x0000000000400000-0x00000000005B8000-memory.dmp

C:\Windows\SysWOW64\Meume.exe

MD5 3311b8c3707f75831aa443db406c71e0
SHA1 ad5ebc62c45287e67febc164b7b7b876b82b6a5d
SHA256 364b087a1916c5f13675449a4470763adebd4977fc21ea2169d8d67b11e83ba7
SHA512 86cc39e7c4b82f03d0f4b3f2d7021626b7294c0ec909152a457f73ce829923934daae696ffd5306edde43f807f1ed35261e25093e47c8645a5d37317ec87c19f

memory/1920-14-0x0000000010000000-0x000000001019F000-memory.dmp

memory/2248-22-0x0000000000400000-0x00000000005B8000-memory.dmp

memory/1920-23-0x0000000000400000-0x00000000005B8000-memory.dmp

memory/1476-21-0x0000000000400000-0x00000000005B8000-memory.dmp

memory/2248-24-0x0000000010000000-0x000000001019F000-memory.dmp

memory/2248-40-0x0000000000020000-0x0000000000021000-memory.dmp

memory/2248-39-0x0000000000400000-0x00000000005B8000-memory.dmp