Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
PURCHASE ORDER # 12076038 & 12076022.exe

Overview

General Information

Sample Name:PURCHASE ORDER # 12076038 & 12076022.exe
Analysis ID:756258
MD5:152c62372d3ea07d023e1e187766fd4b
SHA1:32b630bc22b63d7eee42851175ebe43a13a92c15
SHA256:b3e12ecdee9eacc7354a7d43ccd3ebe7e6db207e93f73b7a847ff4bee9f27f86
Tags:agentteslaexe
Infos:

Detection

AgentTesla
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Yara detected AgentTesla
Yara detected AntiVM3
Sigma detected: Scheduled temp file as task from temp location
Multi AV Scanner detection for dropped file
Snort IDS alert for network traffic
Tries to steal Mail credentials (via file / registry access)
Initial sample is a PE file and has a suspicious name
Writes to foreign memory regions
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to harvest and steal ftp login credentials
.NET source code references suspicious native API functions
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Machine Learning detection for sample
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains very large array initializations
Machine Learning detection for dropped file
Hides that the sample has been downloaded from the Internet (zone.identifier)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Uses schtasks.exe or at.exe to add and modify task schedules
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
Antivirus or Machine Learning detection for unpacked file
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Internet Provider seen in connection with other malware
Detected potential crypto function
Found potential string decryption / allocating functions
Sample execution stops while process was sleeping (likely an evasion)
Yara detected Credential Stealer
Creates processes with suspicious names
IP address seen in connection with other malware
Contains long sleeps (>= 3 min)
Enables debug privileges
Creates a DirectInput object (often for capturing keystrokes)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Sample file is different than original file name gathered from version info
Drops PE files
Detected TCP or UDP traffic on non-standard ports
Uses SMTP (mail sending)
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Dropped file seen in connection with other malware
Creates a process in suspended mode (likely to inject code)
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)

Classification

Process Tree

  • System is w10x64
  • PURCHASE ORDER # 12076038 & 12076022.exe (PID: 6092 cmdline: C:\Users\user\Desktop\PURCHASE ORDER # 12076038 & 12076022.exe MD5: 152C62372D3EA07D023E1E187766FD4B)
    • schtasks.exe (PID: 1836 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WytzFSULZWRc" /XML "C:\Users\user\AppData\Local\Temp\tmp778D.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 2240 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • RegSvcs.exe (PID: 4700 cmdline: {path} MD5: 2867A3817C9245F7CF518524DFD18F28)