Malware Analysis Report

2024-10-19 07:37

Sample ID 211006-j4r7mabadl
Target 1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215
SHA256 1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215
Tags
xpertrat test 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 Overview

score
10/10

SHA256

1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215

Threat Level: Known bad

The file 1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215 was found to be: Known bad.

Malicious Activity Summary

xpertrat test evasion persistence rat trojan

UAC bypass

XpertRAT Core Payload

Windows security bypass

XpertRAT

Adds policy Run key to start application

Deletes itself

Windows security modification

Checks whether UAC is enabled

Adds Run key to start application

Suspicious use of SetThreadContext

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

System policy modification

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-10-06 08:13

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-10-06 08:13

Reported

2021-10-06 08:16

Platform

win10-en-20210920

Max time kernel

148s

Max time network

133s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.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\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0.exe" C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\notepad.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\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0.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\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0.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\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2352 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe
PID 2352 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe
PID 2352 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe
PID 2352 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe
PID 2352 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe
PID 2352 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe
PID 2352 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe
PID 3020 wrote to memory of 4084 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3020 wrote to memory of 4084 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3020 wrote to memory of 4084 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3020 wrote to memory of 4084 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3020 wrote to memory of 4084 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3020 wrote to memory of 4084 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3020 wrote to memory of 4084 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3020 wrote to memory of 4084 N/A C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 4084 wrote to memory of 968 N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe C:\Windows\SysWOW64\notepad.exe
PID 4084 wrote to memory of 968 N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe C:\Windows\SysWOW64\notepad.exe
PID 4084 wrote to memory of 968 N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe C:\Windows\SysWOW64\notepad.exe
PID 4084 wrote to memory of 968 N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe C:\Windows\SysWOW64\notepad.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\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe

"C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe"

C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe

C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe

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

C:\Users\Admin\AppData\Local\Temp\1a55b87ef779fe996b8aef3e98ea9252a5ce3a02d3a0a87000554bd41033a215.exe

C:\Windows\SysWOW64\notepad.exe

notepad.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 store2.gofile.io udp
FR 31.14.69.10:443 store2.gofile.io tcp
US 8.8.8.8:53 kapasky-antivirus.firewall-gateway.net udp
FR 91.121.250.249:4000 kapasky-antivirus.firewall-gateway.net tcp
FR 91.121.250.249:4000 kapasky-antivirus.firewall-gateway.net tcp
FR 91.121.250.249:4000 kapasky-antivirus.firewall-gateway.net tcp
US 52.182.143.208:443 tcp
US 8.8.8.8:53 kapasky-antivirus.firewall-gateway.net udp
FR 91.121.250.249:4000 kapasky-antivirus.firewall-gateway.net tcp
FR 91.121.250.249:4000 kapasky-antivirus.firewall-gateway.net tcp
FR 91.121.250.249:4000 kapasky-antivirus.firewall-gateway.net tcp

Files

memory/2352-115-0x0000000000080000-0x0000000000081000-memory.dmp

memory/2352-117-0x0000000004A50000-0x0000000004A51000-memory.dmp

memory/2352-118-0x00000000058D0000-0x00000000059AF000-memory.dmp

memory/2352-119-0x0000000005B30000-0x0000000005B60000-memory.dmp

memory/3020-120-0x0000000000400000-0x000000000042C000-memory.dmp

memory/3020-121-0x00000000004010B8-mapping.dmp

memory/4084-124-0x0000000000400000-0x0000000000443000-memory.dmp

memory/4084-125-0x0000000000401364-mapping.dmp

memory/4084-128-0x0000000003670000-0x00000000037C3000-memory.dmp

memory/4084-129-0x0000000003671000-0x000000000376D000-memory.dmp

memory/3020-132-0x0000000000400000-0x000000000042C000-memory.dmp

memory/968-133-0x0000000000000000-mapping.dmp