Malware Analysis Report

2024-10-23 20:10

Sample ID 210713-2exd3xz5sn
Target 80099d016219e9682b1e217586f5cad1.exe
SHA256 d7f2fddb43eb63f9246f0a4535dfcca6da2817592455d7eceaacde666cf1aaae
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

d7f2fddb43eb63f9246f0a4535dfcca6da2817592455d7eceaacde666cf1aaae

Threat Level: Known bad

The file 80099d016219e9682b1e217586f5cad1.exe was found to be: Known bad.

Malicious Activity Summary

xpertrat bxk evasion persistence rat trojan

Windows security bypass

XpertRAT

UAC bypass

XpertRAT Core Payload

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 behavior: EnumeratesProcesses

System policy modification

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-07-22 15:37

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2021-07-13 13:37

Reported

2021-07-13 13:39

Platform

win10v20210408

Max time kernel

143s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.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\80099d016219e9682b1e217586f5cad1.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\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\80099d016219e9682b1e217586f5cad1.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.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\80099d016219e9682b1e217586f5cad1.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 532 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 532 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 532 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 532 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 532 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 532 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 532 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 2784 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2784 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2784 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2784 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2784 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2784 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2784 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2784 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.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\80099d016219e9682b1e217586f5cad1.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe

"C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe"

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe

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

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.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/532-114-0x00000000008F0000-0x00000000008F1000-memory.dmp

memory/532-116-0x0000000005870000-0x0000000005871000-memory.dmp

memory/532-117-0x0000000005250000-0x0000000005251000-memory.dmp

memory/532-118-0x0000000005370000-0x000000000586E000-memory.dmp

memory/532-119-0x00000000051D0000-0x00000000051D1000-memory.dmp

memory/532-120-0x0000000005430000-0x000000000548B000-memory.dmp

memory/532-121-0x0000000006DF0000-0x0000000006DF1000-memory.dmp

memory/532-122-0x0000000006EC0000-0x0000000006EC1000-memory.dmp

memory/532-127-0x00000000077C0000-0x000000000781E000-memory.dmp

memory/2784-128-0x0000000000400000-0x000000000042C000-memory.dmp

memory/2784-129-0x00000000004010B8-mapping.dmp

memory/2784-131-0x0000000000400000-0x000000000042C000-memory.dmp

memory/1380-133-0x0000000000400000-0x0000000000444000-memory.dmp

memory/1380-134-0x0000000000401364-mapping.dmp

memory/1380-137-0x00000000033B0000-0x0000000003503000-memory.dmp

memory/1380-138-0x00000000033B1000-0x00000000034AD000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2021-07-13 13:37

Reported

2021-07-13 13:40

Platform

win7v20210410

Max time kernel

139s

Max time network

185s

Command Line

"C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.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\80099d016219e9682b1e217586f5cad1.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\80099d016219e9682b1e217586f5cad1.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.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\80099d016219e9682b1e217586f5cad1.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 1104 wrote to memory of 672 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 672 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 672 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 672 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 1104 wrote to memory of 332 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe
PID 332 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 332 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 332 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 332 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 332 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 332 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 332 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 332 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 332 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.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\80099d016219e9682b1e217586f5cad1.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe

"C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe"

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.exe

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

C:\Users\Admin\AppData\Local\Temp\80099d016219e9682b1e217586f5cad1.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/1104-59-0x00000000002C0000-0x00000000002C1000-memory.dmp

memory/1104-61-0x00000000043B0000-0x00000000043B1000-memory.dmp

memory/1104-62-0x0000000004460000-0x00000000044BB000-memory.dmp

memory/1104-67-0x0000000005BE0000-0x0000000005C3E000-memory.dmp

memory/1104-68-0x00000000043B5000-0x00000000043C6000-memory.dmp

memory/332-70-0x00000000004010B8-mapping.dmp

memory/332-69-0x0000000000400000-0x000000000042C000-memory.dmp

memory/1508-73-0x0000000000400000-0x0000000000444000-memory.dmp

memory/1508-74-0x0000000000401364-mapping.dmp

memory/1508-75-0x0000000000620000-0x0000000000773000-memory.dmp

memory/1508-78-0x0000000075EF1000-0x0000000075EF3000-memory.dmp