Analysis

  • max time kernel
    112s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • 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 4 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 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 behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1684
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 4.96
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2032
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4.96
        3⤵
        • Delays execution with timeout.exe
        PID:1276
    • C:\Users\Admin\AppData\Local\Temp\payment proof.scr.exe
      "C:\Users\Admin\AppData\Local\Temp\payment proof.scr.exe"
      2⤵
        PID:328
      • 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:1344

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/1344-8-0x0000000000400000-0x0000000000448000-memory.dmp

          memory/1344-10-0x0000000000400000-0x0000000000448000-memory.dmp

          memory/1344-11-0x0000000000400000-0x0000000000448000-memory.dmp

          memory/1344-12-0x0000000074110000-0x00000000747FE000-memory.dmp

          memory/1684-2-0x0000000074110000-0x00000000747FE000-memory.dmp

          memory/1684-3-0x0000000001130000-0x0000000001131000-memory.dmp

          memory/1684-7-0x0000000000AB0000-0x0000000000AF9000-memory.dmp