Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
Purchase order 450080088 proj. Allt Charnan.exe

Overview

General Information

Sample Name:Purchase order 450080088 proj. Allt Charnan.exe
Analysis ID:626538
MD5:152ef22896bf39197d210d40171e898a
SHA1:bdd88e03d9131d7f35e0bfadbed02010d231a1bd
SHA256:5a3834895f08aff701a029275074d4ab47aff4951d6f75e8393b0a97cb8f6031
Tags:agentteslaexe
Infos:

Detection

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

Signatures

Found malware configuration
Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Yara detected AgentTesla
Yara detected AntiVM3
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
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
Modifies the hosts file
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Machine Learning detection for sample
.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
Adds a directory exclusion to Windows Defender
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
Creates processes with suspicious names
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)
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
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 450080088 proj. Allt Charnan.exe (PID: 6588 cmdline: "C:\Users\user\Desktop\Purchase order 450080088 proj. Allt Charnan.exe" MD5: 152EF22896BF39197D210D40171E898A)
    • powershell.exe (PID: 6948 cmdline: C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\user\AppData\Roaming\NpPgfycY.exe MD5: DBA3E6449E97D4E3DF64527EF7012A10)
      • conhost.exe (PID: 6956 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • schtasks.exe (PID: 6964 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NpPgfycY" /XML "C:\Users\user\AppData\Local\Temp\tmp86F3.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 7064 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • jVULYR.exe (PID: 7076 cmdline: "C:\Users\user\AppData\Roaming\jVULYR\jVULYR.exe" MD5: 152EF22896BF39197D210D40171E898A)
    • schtasks.exe (PID: 7060 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NpPgfycY" /XML "C:\Users\user\AppData\Local\Temp\tmpFBF4.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 7132 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • jVULYR.exe (PID: 6676 cmdline: C:\Users\user\AppData\Roaming\jVULYR\jVULYR.exe MD5: 152EF22896BF39197D210D40171E898A)
  • jVULYR.exe (PID: 7100 cmdline: "C:\Users\user\AppData\Roaming\jVULYR\jVULYR.exe" MD5: 152EF22896BF39197D210D40171E898A)
    • schtasks.exe (PID: 6952 cmdline: C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NpPgfycY" /XML "C:\Users\user\AppData\Local\Temp\tmp2B32.tmp MD5: 15FF7D8324231381BAD48A052F85DF04)
      • conhost.exe (PID: 1260 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • jVULYR.exe (PID: 5908 cmdline: C:\Users\user\AppData\Roaming\jVULYR\jVULYR.exe MD5: 152EF22896BF39197D210D40171E898A)
  • cleanup

Malware Configuration

Threatname: Agenttesla

{"Exfil Mode": "SMTP", "Username": "aborderias@transmase.com", "Password": "pass@111", "Host": "smtp.transmase.com"}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000000.00000002.289167000.0000000003F6F000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
    00000000.00000002.289167000.0000000003F6F000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AgentTesla_2Yara detected AgentTeslaJoe Security
      00000019.00000000.352037043.0000000000402000.00000040.00000400.00020000.00000000.sdmpJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
        00000019.00000000.352037043.0000000000402000.00000040.00000400.00020000.00000000.sdmpJoeSecurity_AgentTesla_2Yara detected AgentTeslaJoe Security
          00000019.00000002.517627144.0000000002D51000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
            Click to see the 58 entries

            Unpacked PEs

            SourceRuleDescriptionAuthorStrings
            9.0.Purchase order 450080088 proj. Allt Charnan.exe.400000.4.unpackJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
              9.0.Purchase order 450080088 proj. Allt Charnan.exe.400000.4.unpackJoeSecurity_AgentTesla_2Yara detected AgentTeslaJoe Security
                9.0.Purchase order 450080088 proj. Allt Charnan.exe.400000.4.unpackMALWARE_Win_AgentTeslaV3AgentTeslaV3 infostealer payloadditekSHen
                • 0x32bef:$s10: logins
                • 0x32656:$s11: credential
                • 0x2ec24:$g1: get_Clipboard
                • 0x2ec32:$g2: get_Keyboard
                • 0x2ec3f:$g3: get_Password
                • 0x2ff1c:$g4: get_CtrlKeyDown
                • 0x2ff2c:$g5: get_ShiftKeyDown
                • 0x2ff3d:$g6: get_AltKeyDown
                25.2.jVULYR.exe.400000.0.unpackJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
                  25.2.jVULYR.exe.400000.0.unpackJoeSecurity_AgentTesla_2Yara detected AgentTeslaJoe Security