Malware Analysis Report

2024-12-07 13:41

Sample ID 241107-hypc4sxhkb
Target 07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f
SHA256 07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f
Tags
upx gh0strat purplefox discovery 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

07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f

Threat Level: Known bad

The file 07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f was found to be: Known bad.

Malicious Activity Summary

upx gh0strat purplefox discovery persistence rat rootkit trojan

Gh0st RAT payload

Detect PurpleFox Rootkit

Gh0strat family

PurpleFox

Purplefox family

Gh0strat

Sets service image path in registry

Drops file in Drivers directory

Executes dropped EXE

Loads dropped DLL

Deletes itself

UPX packed file

Drops file in System32 directory

Unsigned PE

System Network Configuration Discovery: Internet Connection Discovery

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: LoadsDriver

Runs ping.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-07 07:08

Signatures

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-07 07:08

Reported

2024-11-07 07:11

Platform

win7-20240903-en

Max time kernel

146s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.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
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
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Gh0strat

rat gh0strat

Gh0strat family

gh0strat

PurpleFox

rootkit trojan purplefox

Purplefox family

purplefox

Drops file in Drivers directory

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

Loads dropped DLL

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\Dtldt.exe C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe N/A
File opened for modification C:\Windows\SysWOW64\Dtldt.exe C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe N/A

UPX packed file

upx
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
N/A N/A N/A N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\Dtldt.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\Dtldt.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\PING.EXE N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe N/A

System Network Configuration Discovery: Internet Connection Discovery

discovery
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A
N/A N/A C:\Windows\SysWOW64\PING.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\Dtldt.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Dtldt.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Dtldt.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Dtldt.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Dtldt.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Dtldt.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1860 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe C:\Windows\SysWOW64\cmd.exe
PID 1860 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe C:\Windows\SysWOW64\cmd.exe
PID 1860 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe C:\Windows\SysWOW64\cmd.exe
PID 1860 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe C:\Windows\SysWOW64\cmd.exe
PID 2388 wrote to memory of 2372 N/A C:\Windows\SysWOW64\Dtldt.exe C:\Windows\SysWOW64\Dtldt.exe
PID 2388 wrote to memory of 2372 N/A C:\Windows\SysWOW64\Dtldt.exe C:\Windows\SysWOW64\Dtldt.exe
PID 2388 wrote to memory of 2372 N/A C:\Windows\SysWOW64\Dtldt.exe C:\Windows\SysWOW64\Dtldt.exe
PID 2388 wrote to memory of 2372 N/A C:\Windows\SysWOW64\Dtldt.exe C:\Windows\SysWOW64\Dtldt.exe
PID 2604 wrote to memory of 2856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2604 wrote to memory of 2856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2604 wrote to memory of 2856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2604 wrote to memory of 2856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe

"C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe"

C:\Windows\SysWOW64\Dtldt.exe

C:\Windows\SysWOW64\Dtldt.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\07426F~1.EXE > nul

C:\Windows\SysWOW64\Dtldt.exe

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

C:\Windows\SysWOW64\PING.EXE

ping -n 2 127.0.0.1

Network

Country Destination Domain Proto
US 8.8.8.8:53 361.ydns.eu udp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
US 8.8.8.8:53 361.ydns.eu udp
HK 38.6.164.18:18089 361.ydns.eu tcp

Files

memory/1860-0-0x0000000000400000-0x0000000000585000-memory.dmp

memory/1860-1-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\Dtldt.exe

MD5 125f71ce4ebd01c3cf45b8cd48df93de
SHA1 1887c2291d49fe802691a47ed94efc4de121f03f
SHA256 07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f
SHA512 4c53909577fc2413a14736e97cfb472c9c24f7530fa1d4b9c5f212bff570e82dde8d6761a296d8fe7fab85c94c721308bd71e0bb2c842b8b44b463e4aeeb11d9

memory/2388-10-0x0000000000400000-0x0000000000585000-memory.dmp

memory/2388-21-0x00000000010F0000-0x0000000001275000-memory.dmp

memory/1860-19-0x0000000000400000-0x0000000000585000-memory.dmp

memory/2388-22-0x0000000000400000-0x0000000000585000-memory.dmp

memory/2372-24-0x0000000010000000-0x000000001019F000-memory.dmp

memory/2372-30-0x0000000000400000-0x0000000000585000-memory.dmp

memory/1860-40-0x0000000000400000-0x0000000000585000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-07 07:08

Reported

2024-11-07 07:11

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.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
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

Gh0strat

rat gh0strat

Gh0strat family

gh0strat

PurpleFox

rootkit trojan purplefox

Purplefox family

purplefox

Drops file in Drivers directory

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

Executes dropped EXE

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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Dtldt.exe C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe N/A
File created C:\Windows\SysWOW64\Dtldt.exe C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe N/A

UPX packed file

upx
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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\Dtldt.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\Dtldt.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\PING.EXE N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe N/A

System Network Configuration Discovery: Internet Connection Discovery

discovery
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A
N/A N/A C:\Windows\SysWOW64\PING.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\Dtldt.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Dtldt.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Dtldt.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Dtldt.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Dtldt.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Dtldt.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe

"C:\Users\Admin\AppData\Local\Temp\07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f.exe"

C:\Windows\SysWOW64\Dtldt.exe

C:\Windows\SysWOW64\Dtldt.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\07426F~1.EXE > nul

C:\Windows\SysWOW64\Dtldt.exe

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

C:\Windows\SysWOW64\PING.EXE

ping -n 2 127.0.0.1

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 361.ydns.eu udp
HK 38.6.164.18:18089 361.ydns.eu tcp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
HK 38.6.164.18:18089 361.ydns.eu tcp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
HK 38.6.164.18:18089 361.ydns.eu tcp
US 8.8.8.8:53 361.ydns.eu udp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 361.ydns.eu tcp
HK 38.6.164.18:18089 tcp

Files

memory/1208-0-0x0000000000400000-0x0000000000585000-memory.dmp

memory/1208-1-0x0000000010000000-0x000000001019F000-memory.dmp

C:\Windows\SysWOW64\Dtldt.exe

MD5 125f71ce4ebd01c3cf45b8cd48df93de
SHA1 1887c2291d49fe802691a47ed94efc4de121f03f
SHA256 07426fd6f4c55e5e7ed9d835fe90810ba6df3156c9c8f24c0260b0062c64636f
SHA512 4c53909577fc2413a14736e97cfb472c9c24f7530fa1d4b9c5f212bff570e82dde8d6761a296d8fe7fab85c94c721308bd71e0bb2c842b8b44b463e4aeeb11d9

memory/1208-18-0x0000000000400000-0x0000000000585000-memory.dmp

memory/1096-20-0x0000000000400000-0x0000000000585000-memory.dmp

memory/3596-22-0x0000000000400000-0x0000000000585000-memory.dmp

memory/3596-11-0x0000000010000000-0x000000001019F000-memory.dmp

memory/1096-38-0x0000000000400000-0x0000000000585000-memory.dmp