Malware Analysis Report

2024-12-07 14:58

Sample ID 241004-pez4tstbqj
Target main.ps1
SHA256 8f4a12b3f2d2669fc50c29397093ba9c0eb73ddf5ac386257f860c6df03738d2
Tags
discovery execution exploit
score
8/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
8/10

SHA256

8f4a12b3f2d2669fc50c29397093ba9c0eb73ddf5ac386257f860c6df03738d2

Threat Level: Likely malicious

The file main.ps1 was found to be: Likely malicious.

Malicious Activity Summary

discovery execution exploit

Possible privilege escalation attempt

Modifies file permissions

Drops file in System32 directory

Drops file in Windows directory

Command and Scripting Interpreter: PowerShell

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-04 12:15

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-04 12:15

Reported

2024-10-04 12:16

Platform

win11-20240802-en

Max time kernel

42s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\main.ps1

Signatures

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\System32\taskmgr.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
File opened for modification C:\Windows\System32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
File opened for modification C:\Windows\System32\control.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
File opened for modification C:\Windows\System32\msconfig.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
File opened for modification C:\Windows\System32\regedt32.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\explorer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
File opened for modification C:\Windows\regedit.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
File opened for modification C:\Windows\notepad.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\takeown.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3604 wrote to memory of 4328 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 3604 wrote to memory of 4328 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 4328 wrote to memory of 4204 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\takeown.exe
PID 4328 wrote to memory of 4204 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4256 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 3604 wrote to memory of 4256 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 4256 wrote to memory of 2620 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\icacls.exe
PID 4256 wrote to memory of 2620 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4888 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4888 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 3804 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 3804 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 2508 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 2508 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4704 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4704 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4676 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4676 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4632 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4632 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4316 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4316 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 688 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 688 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 3492 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 3492 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4768 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4768 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4708 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4708 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 4420 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 4420 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 1372 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 1372 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\takeown.exe
PID 3604 wrote to memory of 3140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe
PID 3604 wrote to memory of 3140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\icacls.exe

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\main.ps1

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe" /c takeown /F C:\Windows\System32\fr-FR\fms.dll.mui

C:\Windows\system32\takeown.exe

takeown /F C:\Windows\System32\fr-FR\fms.dll.mui

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe" /c icacls C:\Windows\System32\fr-FR\fms.dll.mui /grant administrators:F

C:\Windows\system32\icacls.exe

icacls C:\Windows\System32\fr-FR\fms.dll.mui /grant administrators:F

C:\Windows\system32\takeown.exe

"C:\Windows\system32\takeown.exe" /f C:\Windows\explorer.exe /a /r /d y

C:\Windows\system32\icacls.exe

"C:\Windows\system32\icacls.exe" C:\Windows\explorer.exe /grant administrators:F /t

C:\Windows\system32\takeown.exe

"C:\Windows\system32\takeown.exe" /f C:\Windows\System32\taskmgr.exe /a /r /d y

C:\Windows\system32\icacls.exe

"C:\Windows\system32\icacls.exe" C:\Windows\System32\taskmgr.exe /grant administrators:F /t

C:\Windows\system32\takeown.exe

"C:\Windows\system32\takeown.exe" /f C:\Windows\System32\cmd.exe /a /r /d y

C:\Windows\system32\icacls.exe

"C:\Windows\system32\icacls.exe" C:\Windows\System32\cmd.exe /grant administrators:F /t

C:\Windows\system32\takeown.exe

"C:\Windows\system32\takeown.exe" /f C:\Windows\regedit.exe /a /r /d y

C:\Windows\system32\icacls.exe

"C:\Windows\system32\icacls.exe" C:\Windows\regedit.exe /grant administrators:F /t

C:\Windows\system32\takeown.exe

"C:\Windows\system32\takeown.exe" /f C:\Windows\notepad.exe /a /r /d y

C:\Windows\system32\icacls.exe

"C:\Windows\system32\icacls.exe" C:\Windows\notepad.exe /grant administrators:F /t

C:\Windows\system32\takeown.exe

"C:\Windows\system32\takeown.exe" /f C:\Windows\System32\control.exe /a /r /d y

C:\Windows\system32\icacls.exe

"C:\Windows\system32\icacls.exe" C:\Windows\System32\control.exe /grant administrators:F /t

C:\Windows\system32\takeown.exe

"C:\Windows\system32\takeown.exe" /f C:\Windows\System32\msconfig.exe /a /r /d y

C:\Windows\system32\icacls.exe

"C:\Windows\system32\icacls.exe" C:\Windows\System32\msconfig.exe /grant administrators:F /t

C:\Windows\system32\takeown.exe

"C:\Windows\system32\takeown.exe" /f C:\Windows\System32\regedt32.exe /a /r /d y

C:\Windows\system32\icacls.exe

"C:\Windows\system32\icacls.exe" C:\Windows\System32\regedt32.exe /grant administrators:F /t

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

Network

N/A

Files

memory/3604-0-0x00007FFAEF653000-0x00007FFAEF655000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_myalokge.1oo.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3604-9-0x000002357A3D0000-0x000002357A3F2000-memory.dmp

memory/3604-10-0x00007FFAEF650000-0x00007FFAF0112000-memory.dmp

memory/3604-11-0x00007FFAEF650000-0x00007FFAF0112000-memory.dmp

memory/3604-12-0x00007FFAEF650000-0x00007FFAF0112000-memory.dmp

memory/3604-15-0x00007FFAEF650000-0x00007FFAF0112000-memory.dmp