Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
PURCHASE ORDER.exe

Overview

General Information

Sample Name:PURCHASE ORDER.exe
Analysis ID:755961
MD5:a55b4bb09398659d69f1b8b37541e621
SHA1:975f7c38780d00ae497fcb6addf31f5ad8cdb090
SHA256:ea45a2032eebe69d32b15d3ea505330eb00b5026107e8e123fb9fb9e2bf87496
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)
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
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Machine Learning detection for sample
Injects a PE file into a foreign processes
.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)
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.exe (PID: 5196 cmdline: C:\Users\user\Desktop\PURCHASE ORDER.exe MD5: A55B4BB09398659D69F1B8B37541E621)
    • schtasks.exe (PID: 1948 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PAyWOGoRT" /XML "C:\Users\user\AppData\Local\Temp\tmpF89B.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 2040 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • RegSvcs.exe (PID: 4212 cmdline: {path} MD5: 2867A3817C9245F7CF518524DFD18F28)
  • PAyWOGoRT.exe (PID: 1520 cmdline: C:\Users\user\AppData\Roaming\PAyWOGoRT.exe MD5: A55B4BB09398659D69F1B8B37541E621)
    • schtasks.exe (PID: 1240 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PAyWOGoRT" /XML "C:\Users\user\AppData\Local\Temp\tmp6AED.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 6096 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • RegSvcs.exe (PID: 5292 cmdline: {path} MD5: 2867A3817C9245F7CF518524DFD18F28)
    • RegSvcs.exe (PID: 3836 cmdline: {path} MD5: 2867A3817C9245F7CF518524DFD18F28)
  • yGbzOMp.exe (PID: 1604 cmdline: "C:\Users\user\AppData\Roaming\yGbzOMp\yGbzOMp.exe" MD5: 2867A3817C9245F7CF518524DFD18F28)
    • conhost.exe (PID: 5188 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • yGbzOMp.exe (PID: 4184 cmdline: "C:\Users\user\AppData\Roaming\yGbzOMp\yGbzOMp.exe" MD5: 2867A3817C9245F7CF518524DFD18F28)
    • conhost.exe (PID: 3720 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • cleanup

Malware Configuration

Threatname: Agenttesla

{"Exfil Mode": "SMTP", "Host": "mail.orogenicgroup-bd.com", "Username": "amir.hossain@orogenicgroup-bd.com", "Password": "Hossain$3400"}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000003.00000000.337559814.0000000000402000.00000040.00000400.00020000.00000000.sdmpJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
    00000003.00000000.337559814.0000000000402000.00000040.00000400.00020000.00000000.sdmpJoeSecurity_AgentTesla_2Yara detected AgentTeslaJoe Security
      00000003.00000000.337559814.0000000000402000.00000040.00000400.00020000.00000000.sdmpWindows_Trojan_AgentTesla_d3ac2b2funknownunknown
      • 0x31d44:$a13: get_DnsResolver
      • 0x3043b:$a20: get_LastAccessed
      • 0x32772:$a27: set_InternalServerPort
      • 0x32aa7:$a30: set_GuidMasterKey
      • 0x3054d:$a33: get_Clipboard
      • 0x3055b:$a34: get_Keyboard
      • 0x31928:$a35: get_ShiftKeyDown
      • 0x31939:$a36: get_AltKeyDown
      • 0x30568:$a37: get_Password
      • 0x31083:$a38: get_PasswordHash
      • 0x321a6:$a39: get_DefaultCredentials
      00000000.00000002.341336847.0000000003297000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AntiVM_3Yara detected AntiVM_3Joe Security
        00000003.00000002.412448960.00000000028F1000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security