Malware Analysis Report

2024-08-06 17:37

Sample ID 231012-sfvsaafb9z
Target cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
SHA256 be15093a407e5b70f5539df5eb1c18d0aedee626f6dc7e9db262c29bfe39ba3c
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

be15093a407e5b70f5539df5eb1c18d0aedee626f6dc7e9db262c29bfe39ba3c

Threat Level: Known bad

The file cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe was found to be: Known bad.

Malicious Activity Summary

xpertrat strigio evasion persistence rat trojan

XpertRAT Core payload

UAC bypass

Windows security bypass

XpertRAT

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

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

System policy modification

Suspicious use of WriteProcessMemory

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 15:04

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-10-12 15:04

Reported

2023-10-16 09:19

Platform

win7-20230831-en

Max time kernel

130s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.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\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.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\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.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
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
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run 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\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3849525425-30183055-657688904-1000\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\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2976 set thread context of 2356 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
PID 2356 set thread context of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.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\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.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\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.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 2976 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
PID 2976 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
PID 2976 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
PID 2976 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
PID 2976 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
PID 2976 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
PID 2976 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
PID 2976 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe
PID 2356 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2356 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2356 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2356 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2356 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2356 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2356 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2356 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2356 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.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\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe

"C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe"

C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe

"C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe"

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

C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 sandshoe.myfirewall.org udp
US 79.110.48.151:5344 sandshoe.myfirewall.org tcp
US 79.110.48.151:5344 sandshoe.myfirewall.org tcp
US 79.110.48.151:5344 sandshoe.myfirewall.org tcp
US 8.8.8.8:53 sandshoe.myfirewall.org udp
US 79.110.48.151:5344 sandshoe.myfirewall.org tcp
US 79.110.48.151:5344 sandshoe.myfirewall.org tcp

Files

memory/2976-1-0x00000000740F0000-0x00000000747DE000-memory.dmp

memory/2976-0-0x00000000109E0000-0x0000000010A7A000-memory.dmp

memory/2976-2-0x0000000000630000-0x0000000000670000-memory.dmp

memory/2976-3-0x00000000004B0000-0x00000000004C8000-memory.dmp

memory/2976-4-0x00000000740F0000-0x00000000747DE000-memory.dmp

memory/2976-5-0x0000000000630000-0x0000000000670000-memory.dmp

memory/2976-6-0x00000000004D0000-0x00000000004DA000-memory.dmp

memory/2976-7-0x0000000004DA0000-0x0000000004E0C000-memory.dmp

memory/2356-8-0x0000000000400000-0x000000000042C000-memory.dmp

memory/2356-10-0x0000000000400000-0x000000000042C000-memory.dmp

memory/2356-12-0x0000000000400000-0x000000000042C000-memory.dmp

memory/2356-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2356-16-0x0000000000400000-0x000000000042C000-memory.dmp

memory/2976-20-0x00000000740F0000-0x00000000747DE000-memory.dmp

memory/2652-22-0x0000000000400000-0x0000000000443000-memory.dmp

memory/2356-29-0x0000000000400000-0x000000000042C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-10-12 15:04

Reported

2023-10-16 09:28

Platform

win10v2004-20230915-en

Max time kernel

3s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe

"C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6_JC.exe"

Network

N/A

Files

N/A