Malware Analysis Report

2025-01-02 15:25

Sample ID 240524-1ejmmaca67
Target e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee
SHA256 e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee
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

e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee

Threat Level: Known bad

The file e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee was found to be: Known bad.

Malicious Activity Summary

gh0strat purplefox persistence rat rootkit trojan

PurpleFox

Gh0st RAT payload

Gh0strat

Detect PurpleFox Rootkit

Drops file in Drivers directory

Sets service image path in registry

Loads dropped DLL

Deletes itself

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Runs ping.exe

Suspicious behavior: LoadsDriver

Modifies data under HKEY_USERS

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-24 21:33

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-24 21:33

Reported

2024-05-24 21:36

Platform

win7-20240419-en

Max time kernel

146s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.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\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.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\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.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 1028 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.exe C:\Windows\SysWOW64\cmd.exe
PID 1028 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.exe C:\Windows\SysWOW64\cmd.exe
PID 1028 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.exe C:\Windows\SysWOW64\cmd.exe
PID 1028 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.exe C:\Windows\SysWOW64\cmd.exe
PID 2432 wrote to memory of 2556 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2432 wrote to memory of 2556 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2432 wrote to memory of 2556 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2432 wrote to memory of 2556 N/A C:\Windows\SysWOW64\sainbox.exe C:\Windows\SysWOW64\sainbox.exe
PID 2660 wrote to memory of 1844 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2660 wrote to memory of 1844 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2660 wrote to memory of 1844 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2660 wrote to memory of 1844 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.exe

"C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.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\E7E96C~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 12asasa.e3.luyouxia.net udp
CN 123.99.198.130:12079 12asasa.e3.luyouxia.net tcp
CN 123.99.198.130:12079 12asasa.e3.luyouxia.net tcp
CN 123.99.198.130:12079 12asasa.e3.luyouxia.net tcp
US 8.8.8.8:53 12asasa.e3.luyouxia.net udp
CN 115.231.218.42:12079 12asasa.e3.luyouxia.net tcp
CN 115.231.218.42:12079 12asasa.e3.luyouxia.net tcp
CN 115.231.218.42:12079 12asasa.e3.luyouxia.net tcp
US 8.8.8.8:53 12asasa.e3.luyouxia.net udp
CN 124.248.69.29:12079 12asasa.e3.luyouxia.net tcp

Files

memory/1028-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 26ef3ab737b2c1ba492ccdb6860167c5
SHA1 c8c6bdd17ffebfceceeedb018e36f053a00ddeef
SHA256 e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee
SHA512 51f50842227e54eb7e5b3c6ba8581f15b4c1975186cb0a329f637abe5570a47b1158d8f3c8077f92801108179832a57e1dc3cb7a8d6114099d7540abb8da0452

memory/2556-19-0x0000000010000000-0x000000001019F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-24 21:33

Reported

2024-05-24 21:36

Platform

win10v2004-20240426-en

Max time kernel

145s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.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\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.exe N/A
File opened for modification C:\Windows\SysWOW64\sainbox.exe C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.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\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.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\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.exe

"C:\Users\Admin\AppData\Local\Temp\e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee.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\E7E96C~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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 12asasa.e3.luyouxia.net udp
CN 115.231.218.42:12079 12asasa.e3.luyouxia.net tcp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
BE 2.17.107.122:443 www.bing.com 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
BE 2.17.107.122:443 www.bing.com tcp
US 8.8.8.8:53 122.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
CN 115.231.218.42:12079 12asasa.e3.luyouxia.net tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
CN 115.231.218.42:12079 12asasa.e3.luyouxia.net tcp
US 8.8.8.8:53 91.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 12asasa.e3.luyouxia.net udp
CN 124.248.69.29:12079 12asasa.e3.luyouxia.net tcp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
CN 124.248.69.29:12079 12asasa.e3.luyouxia.net tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
CN 124.248.69.29:12079 12asasa.e3.luyouxia.net tcp
US 8.8.8.8:53 12asasa.e3.luyouxia.net udp
CN 115.231.218.42:12079 12asasa.e3.luyouxia.net tcp

Files

memory/3520-0-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\sainbox.exe

MD5 26ef3ab737b2c1ba492ccdb6860167c5
SHA1 c8c6bdd17ffebfceceeedb018e36f053a00ddeef
SHA256 e7e96cda8a476844be3a605f7b616cf98ca3f41b7f607a2a7b98da5d403014ee
SHA512 51f50842227e54eb7e5b3c6ba8581f15b4c1975186cb0a329f637abe5570a47b1158d8f3c8077f92801108179832a57e1dc3cb7a8d6114099d7540abb8da0452

memory/3656-11-0x0000000010000000-0x000000001019F000-memory.dmp

memory/512-18-0x0000000010000000-0x000000001019F000-memory.dmp