Malware Analysis Report

2024-08-06 17:39

Sample ID 231012-lre3msbd7s
Target c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46
SHA256 c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46
Tags
xpertrat strigio evasion persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46

Threat Level: Known bad

The file c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46 was found to be: Known bad.

Malicious Activity Summary

xpertrat strigio evasion persistence rat trojan

XpertRAT Core payload

Windows security bypass

UAC bypass

XpertRAT

Adds policy Run key to start application

Windows security modification

Adds Run key to start application

Checks whether UAC is enabled

Suspicious use of SetThreadContext

Unsigned PE

System policy modification

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Privilege Escalation
TA0004
Abuse Elevation Control Mechanism
T1548
Bypass User Account Control
T1548.002
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Defense Evasion
TA0005
Abuse Elevation Control Mechanism
T1548
Bypass User Account Control
T1548.002
Impair Defenses
T1562
Disable or Modify Tools
T1562.001
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2023-10-12 09:45

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-10-12 09:45

Reported

2023-10-15 09:57

Platform

win7-20230831-en

Command Line

N/A

Signatures

N/A

Processes

N/A

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-10-12 09:45

Reported

2023-10-15 10:02

Platform

win10v2004-20230915-en

Max time kernel

140s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe"

Signatures

UAC bypass

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\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe N/A

Windows security bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0" C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe N/A

XpertRAT

rat xpertrat

XpertRAT Core payload

Description Indicator Process Target
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\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4 = "C:\\Users\\Admin\\AppData\\Roaming\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4.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\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4 = "C:\\Users\\Admin\\AppData\\Roaming\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4.exe" C:\Program Files (x86)\Internet Explorer\iexplore.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4 = "C:\\Users\\Admin\\AppData\\Roaming\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4.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\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4728 set thread context of 2440 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe
PID 2440 set thread context of 748 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.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\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.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 4728 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe
PID 4728 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe
PID 4728 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe
PID 4728 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe
PID 4728 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe
PID 4728 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe
PID 4728 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe
PID 2440 wrote to memory of 748 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2440 wrote to memory of 748 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2440 wrote to memory of 748 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2440 wrote to memory of 748 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2440 wrote to memory of 748 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2440 wrote to memory of 748 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2440 wrote to memory of 748 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2440 wrote to memory of 748 N/A C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.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\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe

"C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe"

C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe

"C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe"

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

C:\Users\Admin\AppData\Local\Temp\c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 126.20.238.8.in-addr.arpa udp
US 8.8.8.8:53 sandshoe.myfirewall.org udp
US 95.214.27.111:5344 sandshoe.myfirewall.org tcp
US 95.214.27.111:5344 sandshoe.myfirewall.org tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 95.214.27.111:5344 sandshoe.myfirewall.org tcp
US 8.8.8.8:53 sandshoe.myfirewall.org udp
US 95.214.27.111:5344 sandshoe.myfirewall.org tcp
US 95.214.27.111:5344 sandshoe.myfirewall.org tcp
US 8.8.8.8:53 195.201.50.20.in-addr.arpa udp

Files

memory/4728-0-0x0000000074700000-0x0000000074EB0000-memory.dmp

memory/4728-1-0x00000000003B0000-0x0000000000436000-memory.dmp

memory/4728-2-0x00000000053C0000-0x0000000005964000-memory.dmp

memory/4728-3-0x0000000004EB0000-0x0000000004F42000-memory.dmp

memory/4728-4-0x0000000005110000-0x0000000005120000-memory.dmp

memory/4728-5-0x0000000004E40000-0x0000000004E4A000-memory.dmp

memory/4728-6-0x0000000005030000-0x00000000050CC000-memory.dmp

memory/4728-7-0x0000000004E50000-0x0000000004E62000-memory.dmp

memory/4728-8-0x0000000074700000-0x0000000074EB0000-memory.dmp

memory/4728-9-0x0000000005110000-0x0000000005120000-memory.dmp

memory/4728-10-0x0000000005010000-0x0000000005018000-memory.dmp

memory/4728-11-0x00000000050E0000-0x00000000050EC000-memory.dmp

memory/4728-12-0x0000000005D00000-0x0000000005D6A000-memory.dmp

memory/2440-13-0x0000000000400000-0x000000000042C000-memory.dmp

memory/2440-16-0x0000000000400000-0x000000000042C000-memory.dmp

memory/4728-19-0x0000000074700000-0x0000000074EB0000-memory.dmp

memory/748-20-0x0000000000400000-0x0000000000443000-memory.dmp

memory/2440-27-0x0000000000400000-0x000000000042C000-memory.dmp