Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
REMITTANCE COPY.exe

Overview

General Information

Sample Name:REMITTANCE COPY.exe
Analysis ID:756282
MD5:e54ca4f235a6878e6c4913b4ddcba055
SHA1:b91ce873b8a93b46ebac12b5d1e62f3a1a9dd27f
SHA256:6acfd9ea1b88077926a542fd286da3119b626792f71b09927ca252236245d43a
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
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 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)
Detected potential crypto function
Found potential string decryption / allocating functions
Sample execution stops while process was sleeping (likely an evasion)
Yara detected Credential Stealer
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)
Found inlined nop instructions (likely shell or obfuscated code)
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
  • REMITTANCE COPY.exe (PID: 2820 cmdline: C:\Users\user\Desktop\REMITTANCE COPY.exe MD5: E54CA4F235A6878E6C4913B4DDCBA055)
    • schtasks.exe (PID: 5524 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\FSmZIJwnxoJulr" /XML "C:\Users\user\AppData\Local\Temp\tmp72FE.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 5624 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • RegSvcs.exe (PID: 5924 cmdline: {path} MD5: 2867A3817C9245F7CF518524DFD18F28)
  • FSmZIJwnxoJulr.exe (PID: 3804 cmdline: C:\Users\user\AppData\Roaming\FSmZIJwnxoJulr.exe MD5: E54CA4F235A6878E6C4913B4DDCBA055)
    • schtasks.exe (PID: 5020 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\FSmZIJwnxoJulr" /XML "C:\Users\user\AppData\Local\Temp\tmp77E.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 64 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • RegSvcs.exe (PID: 2316 cmdline: {path} MD5: 2867A3817C9245F7CF518524DFD18F28)
    • RegSvcs.exe (PID: 5856 cmdline: {path} MD5: 2867A3817C9245F7CF518524DFD18F28)