Analysis

  • max time kernel
    115s
  • max time network
    8s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    12/05/2021, 09:54

General

  • Target
    Revised Invoice pdf.exe
  • Size 975KB
  • Sample210512-7vsdvccft6
  • SHA256 77ccf33c233dd2f10f699699ca25eff2c6da889962f898b244244a1df4ebc806
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • agenttesla

Credentials
  • Protocol

    smtp

  • Host

    mail.esquiresweaters.com

  • Port

    587

  • Password

    Esquire@#2078

Signatures

  • AgentTesla

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

  • AgentTesla Payload 2 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 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Revised Invoice pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Revised Invoice pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1996
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\utILOuxEOwQEy" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA6DA.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1008
    • C:\Users\Admin\AppData\Local\Temp\Revised Invoice pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\Revised Invoice pdf.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1060
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
        dw20.exe -x -s 516
        3⤵
          PID:696

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/696-71-0x0000000000390000-0x0000000000391000-memory.dmp

          memory/1060-65-0x0000000000400000-0x000000000043C000-memory.dmp

          memory/1060-68-0x00000000002F0000-0x00000000002F1000-memory.dmp

          memory/1996-60-0x0000000075D41000-0x0000000075D43000-memory.dmp

          memory/1996-62-0x00000000009E1000-0x00000000009E2000-memory.dmp

          memory/1996-61-0x00000000009E0000-0x00000000009E1000-memory.dmp