Analysis

  • max time kernel
    96s
  • max time network
    104s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    18/12/2020, 14:07

General

  • Target
    payment proof.scr.exe
  • Size 40KB
  • Sample201218-m3fk5r2d42
  • SHA256 5f8c7788c7ce23bead2ccae4724fe05e277007f2caed3eedfef6103a4bbfabae
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • agenttesla

C2
  • https://api.telegram.org/bot1481923647:AAGiBTAuCt4mxLt_RWPYNlSpw01yplTkoZI/sendDocument

Signatures

  • AgentTesla

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

  • AgentTesla Payload 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\payment proof.scr.exe
    "C:\Users\Admin\AppData\Local\Temp\payment proof.scr.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4764
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 4.96
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4240
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4.96
        3⤵
        • Delays execution with timeout.exe
        PID:692
    • C:\Users\Admin\AppData\Local\Temp\payment proof.scr.exe
      "C:\Users\Admin\AppData\Local\Temp\payment proof.scr.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:648

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/648-21-0x00000000051D0000-0x00000000051D1000-memory.dmp

        memory/648-20-0x00000000062B0000-0x00000000062B1000-memory.dmp

        memory/648-19-0x0000000005EE0000-0x0000000005EE1000-memory.dmp

        memory/648-18-0x0000000005270000-0x0000000005271000-memory.dmp

        memory/648-13-0x00000000732D0000-0x00000000739BE000-memory.dmp

        memory/648-10-0x0000000000400000-0x0000000000448000-memory.dmp

        memory/4764-9-0x0000000007650000-0x0000000007651000-memory.dmp

        memory/4764-8-0x0000000002900000-0x0000000002949000-memory.dmp

        memory/4764-2-0x00000000732D0000-0x00000000739BE000-memory.dmp

        memory/4764-5-0x0000000004FC0000-0x0000000004FC1000-memory.dmp

        memory/4764-3-0x00000000007A0000-0x00000000007A1000-memory.dmp