Malware Analysis Report

2024-09-22 15:12

Sample ID 240601-mmtkxaaa9y
Target 9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2
SHA256 9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2
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

9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2

Threat Level: Known bad

The file 9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2 was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

Gh0strat

PurpleFox

Detect PurpleFox Rootkit

Gh0st RAT payload

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

Suspicious use of AdjustPrivilegeToken

Runs ping.exe

Suspicious behavior: LoadsDriver

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-01 10:35

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-01 10:35

Reported

2024-06-01 10:37

Platform

win7-20240220-en

Max time kernel

145s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.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\Vnfvn.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\Vnfvn.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\Vnfvn.exe N/A
N/A N/A C:\Windows\SysWOW64\Vnfvn.exe N/A

Loads dropped DLL

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\Vnfvn.exe C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe N/A
File opened for modification C:\Windows\SysWOW64\Vnfvn.exe C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.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\Vnfvn.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Vnfvn.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Vnfvn.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Vnfvn.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Vnfvn.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Vnfvn.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3036 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe C:\Windows\SysWOW64\cmd.exe
PID 3036 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe C:\Windows\SysWOW64\cmd.exe
PID 3036 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe C:\Windows\SysWOW64\cmd.exe
PID 3036 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe C:\Windows\SysWOW64\cmd.exe
PID 2944 wrote to memory of 2632 N/A C:\Windows\SysWOW64\Vnfvn.exe C:\Windows\SysWOW64\Vnfvn.exe
PID 2944 wrote to memory of 2632 N/A C:\Windows\SysWOW64\Vnfvn.exe C:\Windows\SysWOW64\Vnfvn.exe
PID 2944 wrote to memory of 2632 N/A C:\Windows\SysWOW64\Vnfvn.exe C:\Windows\SysWOW64\Vnfvn.exe
PID 2944 wrote to memory of 2632 N/A C:\Windows\SysWOW64\Vnfvn.exe C:\Windows\SysWOW64\Vnfvn.exe
PID 2576 wrote to memory of 2100 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2576 wrote to memory of 2100 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2576 wrote to memory of 2100 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2576 wrote to memory of 2100 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe

"C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe"

C:\Windows\SysWOW64\Vnfvn.exe

C:\Windows\SysWOW64\Vnfvn.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\9BE8EC~1.EXE > nul

C:\Windows\SysWOW64\Vnfvn.exe

C:\Windows\SysWOW64\Vnfvn.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 muqi1337.e3.luyouxia.net udp
CN 115.231.218.42:1334 muqi1337.e3.luyouxia.net tcp
CN 115.231.218.42:1334 muqi1337.e3.luyouxia.net tcp
CN 115.231.218.42:1334 muqi1337.e3.luyouxia.net tcp
US 8.8.8.8:53 muqi1337.e3.luyouxia.net udp
CN 124.248.69.29:1334 muqi1337.e3.luyouxia.net tcp
CN 124.248.69.29:1334 muqi1337.e3.luyouxia.net tcp
CN 124.248.69.29:1334 muqi1337.e3.luyouxia.net tcp
US 8.8.8.8:53 muqi1337.e3.luyouxia.net udp
CN 124.248.69.29:1334 muqi1337.e3.luyouxia.net tcp

Files

memory/3036-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\Vnfvn.exe

MD5 50de1c24d99f3ac23650ea1a8d08db8f
SHA1 2841f67d154bc61b009e007f30c642d85a085cd6
SHA256 c48cc81a450e46b2486b3cf19bb11af3620ffa77eea0783d54ac91a1e25866e7
SHA512 58a2e61e96feadaa9009d3db3bb9dac343383321501a50b8d94e5c44c3951a4def19604c5171942bba52d7f222bd14f8c74d6e74a6dd004008cf5b3e0e502755

memory/2632-19-0x0000000010000000-0x000000001019F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-01 10:35

Reported

2024-06-01 10:37

Platform

win10v2004-20240508-en

Max time kernel

146s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.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\Vnfvn.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\Vnfvn.exe N/A

Executes dropped EXE

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\Vnfvn.exe C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe N/A
File opened for modification C:\Windows\SysWOW64\Vnfvn.exe C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.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\Vnfvn.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Vnfvn.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Vnfvn.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Vnfvn.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Vnfvn.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Vnfvn.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe

"C:\Users\Admin\AppData\Local\Temp\9be8ec4fc45bf194762abfc2d0393fe9fc14f26ef4cdcdc4ee594a0efdb354f2.exe"

C:\Windows\SysWOW64\Vnfvn.exe

C:\Windows\SysWOW64\Vnfvn.exe -auto

C:\Windows\SysWOW64\Vnfvn.exe

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

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\9BE8EC~1.EXE > nul

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=1280,i,1697479186275492802,18058102846092193784,262144 --variations-seed-version --mojo-platform-channel-handle=4404 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 muqi1337.e3.luyouxia.net udp
CN 123.99.198.130:1334 muqi1337.e3.luyouxia.net tcp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
CN 123.99.198.130:1334 muqi1337.e3.luyouxia.net tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
CN 123.99.198.130:1334 muqi1337.e3.luyouxia.net tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 muqi1337.e3.luyouxia.net udp
CN 115.231.218.42:1334 muqi1337.e3.luyouxia.net tcp
CN 115.231.218.42:1334 muqi1337.e3.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 27.73.42.20.in-addr.arpa udp
CN 115.231.218.42:1334 muqi1337.e3.luyouxia.net tcp
US 8.8.8.8:53 muqi1337.e3.luyouxia.net udp
CN 115.231.218.42:1334 muqi1337.e3.luyouxia.net tcp

Files

memory/1620-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\Vnfvn.exe

MD5 50de1c24d99f3ac23650ea1a8d08db8f
SHA1 2841f67d154bc61b009e007f30c642d85a085cd6
SHA256 c48cc81a450e46b2486b3cf19bb11af3620ffa77eea0783d54ac91a1e25866e7
SHA512 58a2e61e96feadaa9009d3db3bb9dac343383321501a50b8d94e5c44c3951a4def19604c5171942bba52d7f222bd14f8c74d6e74a6dd004008cf5b3e0e502755

memory/4804-11-0x0000000010000000-0x000000001019F000-memory.dmp

memory/4364-18-0x0000000010000000-0x000000001019F000-memory.dmp