Malware Analysis Report

2024-10-23 20:10

Sample ID 210712-e5z67ryvhn
Target 810436f7d29ced22beac8734da3acacf.exe
SHA256 86214e9a4b21afd0a46c93ee39eb99b188e43cc773a15f632fe8bea3169ee0a5
Tags
xpertrat bxk evasion persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

86214e9a4b21afd0a46c93ee39eb99b188e43cc773a15f632fe8bea3169ee0a5

Threat Level: Known bad

The file 810436f7d29ced22beac8734da3acacf.exe was found to be: Known bad.

Malicious Activity Summary

xpertrat bxk evasion persistence rat trojan

Windows security bypass

XpertRAT Core Payload

XpertRAT

UAC bypass

Adds policy Run key to start application

Windows security modification

Checks whether UAC is enabled

Adds Run key to start application

Suspicious use of SetThreadContext

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

System policy modification

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-07-22 15:37

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-07-12 08:58

Reported

2021-07-12 09:00

Platform

win7v20210410

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe"

Signatures

UAC bypass

evasion trojan

Windows security bypass

evasion trojan

XpertRAT

rat xpertrat

XpertRAT Core Payload

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

Adds policy Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6 = "C:\\Users\\Admin\\AppData\\Roaming\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6.exe" C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Windows security modification

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0" C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6 = "C:\\Users\\Admin\\AppData\\Roaming\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6.exe" C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6 = "C:\\Users\\Admin\\AppData\\Roaming\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6.exe" C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe N/A
N/A N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1420 wrote to memory of 304 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 304 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 304 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 304 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 1688 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 1688 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 1688 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 1688 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 1688 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 1688 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 1688 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1420 wrote to memory of 1688 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 1688 wrote to memory of 1008 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1688 wrote to memory of 1008 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1688 wrote to memory of 1008 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1688 wrote to memory of 1008 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1688 wrote to memory of 1008 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1688 wrote to memory of 1008 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1688 wrote to memory of 1008 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1688 wrote to memory of 1008 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1688 wrote to memory of 1008 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe

"C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe"

C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe

"{path}"

C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe

"{path}"

C:\Program Files (x86)\Internet Explorer\iexplore.exe

C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 ioxg.ix.tc udp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp

Files

memory/1420-60-0x0000000010080000-0x0000000010081000-memory.dmp

memory/1420-62-0x0000000074FB1000-0x0000000074FB3000-memory.dmp

memory/1420-63-0x0000000000250000-0x0000000000252000-memory.dmp

memory/1420-64-0x0000000005060000-0x0000000005061000-memory.dmp

memory/1420-65-0x0000000005880000-0x0000000005926000-memory.dmp

memory/1420-66-0x0000000001F40000-0x0000000001F97000-memory.dmp

memory/1688-67-0x0000000000400000-0x000000000042C000-memory.dmp

memory/1688-68-0x00000000004010B8-mapping.dmp

memory/1008-71-0x0000000000400000-0x0000000000444000-memory.dmp

memory/1008-72-0x0000000000401364-mapping.dmp

memory/1008-73-0x0000000000580000-0x00000000006D3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-07-12 08:58

Reported

2021-07-12 09:00

Platform

win10v20210410

Max time kernel

145s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe"

Signatures

UAC bypass

evasion trojan

Windows security bypass

evasion trojan

XpertRAT

rat xpertrat

XpertRAT Core Payload

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

Adds policy Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6 = "C:\\Users\\Admin\\AppData\\Roaming\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6.exe" C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Windows security modification

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0" C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6 = "C:\\Users\\Admin\\AppData\\Roaming\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6.exe" C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6 = "C:\\Users\\Admin\\AppData\\Roaming\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6.exe" C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe N/A
N/A N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 772 wrote to memory of 4004 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 772 wrote to memory of 4004 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 772 wrote to memory of 4004 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 772 wrote to memory of 4004 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 772 wrote to memory of 4004 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 772 wrote to memory of 4004 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 772 wrote to memory of 4004 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe
PID 4004 wrote to memory of 3148 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 4004 wrote to memory of 3148 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 4004 wrote to memory of 3148 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 4004 wrote to memory of 3148 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 4004 wrote to memory of 3148 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 4004 wrote to memory of 3148 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 4004 wrote to memory of 3148 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 4004 wrote to memory of 3148 N/A C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe

"C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe"

C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe

"{path}"

C:\Program Files (x86)\Internet Explorer\iexplore.exe

C:\Users\Admin\AppData\Local\Temp\810436f7d29ced22beac8734da3acacf.exe

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 ioxg.ix.tc udp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp
N/A 37.0.11.114:4000 ioxg.ix.tc tcp

Files

memory/772-114-0x00000000004C0000-0x00000000004C1000-memory.dmp

memory/772-116-0x0000000005360000-0x0000000005361000-memory.dmp

memory/772-117-0x0000000004E60000-0x0000000004E61000-memory.dmp

memory/772-118-0x00000000052F0000-0x00000000052F1000-memory.dmp

memory/772-119-0x0000000004E20000-0x0000000004E21000-memory.dmp

memory/772-120-0x00000000069C0000-0x00000000069C1000-memory.dmp

memory/772-121-0x0000000006930000-0x0000000006932000-memory.dmp

memory/772-122-0x00000000087F0000-0x0000000008896000-memory.dmp

memory/772-123-0x000000000AFE0000-0x000000000B037000-memory.dmp

memory/4004-124-0x0000000000400000-0x000000000042C000-memory.dmp

memory/4004-125-0x00000000004010B8-mapping.dmp

memory/3148-128-0x0000000000400000-0x0000000000444000-memory.dmp

memory/3148-129-0x0000000000401364-mapping.dmp

memory/3148-132-0x0000000003560000-0x00000000036B3000-memory.dmp

memory/3148-133-0x0000000003561000-0x000000000365D000-memory.dmp

memory/4004-136-0x0000000000400000-0x000000000042C000-memory.dmp