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Windows Analysis Report


General Information

Sample Name:PO.exe
Analysis ID:756266


AgentTesla, GuLoader
Range:0 - 100


Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Yara detected Telegram RAT
Yara detected AgentTesla
Yara detected GuLoader
Snort IDS alert for network traffic
Installs a global keyboard hook
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to detect Any.run
Tries to harvest and steal ftp login credentials
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses the Telegram API (likely for C&C communication)
Contains functionality to register a low level keyboard hook
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Tries to harvest and steal browser information (history, passwords, etc)
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
May sleep (evasive loops) to hinder dynamic analysis
Contains functionality to shutdown / reboot the system
Uses code obfuscation techniques (call, push, ret)
Creates files inside the system directory
Detected potential crypto function
Contains functionality to query CPU information (cpuid)
Sample execution stops while process was sleeping (likely an evasion)
Yara detected Credential Stealer
JA3 SSL client fingerprint seen in connection with other malware
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Contains functionality for execution timing, often used to detect debuggers
Contains long sleeps (>= 3 min)
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Drops PE files
Tries to load missing DLLs
Contains functionality to read the PEB
Uses a known web browser user agent for HTTP communication
Checks if the current process is being debugged
Creates a window with clipboard capturing capabilities
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Uses Microsoft's Enhanced Cryptographic Provider
Creates a process in suspended mode (likely to inject code)
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality for read data from the clipboard


  • System is w10x64native
  • PO.exe (PID: 5272 cmdline: C:\Users\user\Desktop\PO.exe MD5: 9297126FD9624F7DC2D4F64F072668A2)
    • CasPol.exe (PID: 7240 cmdline: C:\Users\user\Desktop\PO.exe MD5: 914F728C04D3EDDD5FBA59420E74E56B)
      • conhost.exe (PID: 1336 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 81CA40085FC75BABD2C91D18AA9FFA68)
  • cleanup
{"Exfil Mode": "Telegram", "Chat id": "561616954", "Chat URL": "https://api.telegram.org/bot5088709131:AAFHCIxHU907RAI3XEaH2G6LgE9wrdrAgI0/sendDocument"}
{"C2 url": "https://api.telegram.org/bot5088709131:AAFHCIxHU907RAI3XEaH2G6LgE9wrdrAgI0/sendMessage"}
00000004.00000002.89339190222.000000001D990000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
    00000001.00000002.85191335084.00000000032A0000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_GuLoader_2Yara detected GuLoaderJoe Security
      00000004.00000000.84958072563.0000000001110000.00000040.00000400.00020000.00000000.sdmpJoeSecurity_GuLoader_2Yara detected GuLoaderJoe Security
        00000004.00000002.89336734210.000000001D8B1000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
          00000004.00000002.89336734210.000000001D8B1000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_CredentialStealerYara detected Credential StealerJoe Security
            Click to see the 6 entries
            No Sigma rule has matched
            Timestamp: 11/29/22-22:50:36.593124
            Source Port:49854
            Destination Port:443
            Classtype:A Network Trojan was detected

            Click to jump to signature section

            Show All Signature Results

            AV Detection

            Source: PO.exeVirustotal: Detection: 29%Perma Link
            Source: PO.exeReversingLabs: Detection: 26%
            Source: CasPol.exe.7240.4.memstrminMalware Configuration Extractor: Agenttesla {"Exfil Mode": "Telegram", "Chat id": "561616954", "Chat URL": "https://api.telegram.org/bot5088709131:AAFHCIxHU907RAI3XEaH2G6LgE9wrdrAgI0/sendDocument"}
            Source: CasPol.exe.7240.4.memstrminMalware Configuration Extractor: Telegram RAT {"C2 url": "https://api.telegram.org/bot5088709131:AAFHCIxHU907RAI3XEaH2G6LgE9wrdrAgI0/sendMessage"}
            Source: C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exeCode function: 4_2_010DD808 CryptUnprotectData,4_2_010DD808
            Source: C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exeCode function: 4_2_010DDEF0 CryptUnprotectData,4_2_010DDEF0