Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    05/05/2022, 01:28

General

  • Target
    Payment Slip.exe
  • Size 517KB
  • Sample220505-bvntvaeha9
  • SHA256 1a7627dcff8f8d294411d085df8775e37c8277e86e55bbb5a45afe863a95d208
  • MD5 SHA1 SHA512

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    mail.avizatechnologies.com

  • Port

    587

  • Password

    s?I%3su#oFtB

Extracted

Family
  • agenttesla

Credentials

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • suricata: ET MALWARE AgentTesla Exfil Via SMTP

    suricata: ET MALWARE AgentTesla Exfil Via SMTP

  • Drops file in Drivers directory 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Payment Slip.exe
    "C:\Users\Admin\AppData\Local\Temp\Payment Slip.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3520
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\VftiwBA" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC45E.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3836
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1532

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        tmpC45E.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmpC45E.tmp
        • Size 1KB
        • SHA256 eb2885d12d2e5699b01596350d588d7228f4c996e990c28e3e0b046362311b60
        • MD5 SHA1 SHA512

        memory/1532-138-0x0000000000400000-0x000000000043A000-memory.dmp

        memory/1532-139-0x0000000005570000-0x00000000055D6000-memory.dmp

        memory/1532-140-0x00000000065C0000-0x0000000006610000-memory.dmp

        memory/3520-130-0x0000000000F60000-0x0000000000FE8000-memory.dmp

        memory/3520-131-0x0000000005E80000-0x0000000006424000-memory.dmp

        memory/3520-132-0x00000000059B0000-0x0000000005A42000-memory.dmp

        memory/3520-133-0x0000000005A50000-0x0000000005AEC000-memory.dmp

        memory/3520-134-0x0000000005980000-0x000000000598A000-memory.dmp