Analysis

  • max time kernel
    143s
  • max time network
    24s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    13-07-2020 06:34

General

  • Target

    Payment doc747322.exe

  • Size

    491KB

  • MD5

    88087279864b6d4db153f6dd9c68f065

  • SHA1

    7e8a69d8aecc43d9449af37efb5fcdaee1cf4166

  • SHA256

    112fe86589f5587620a62be8ebeab2ee9898f770762f7be2b92a229c46d52917

  • SHA512

    7c9003242e32bbca7890e0393c370686e3a4011e98e6b3c77859d73d6b97ab89752c1da3c2909bee3ee72333117721f63ecdb856317ebde71cb8ed854c786dfd

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.privateemail.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    killdemall007

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • 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.

  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Payment doc747322.exe
    "C:\Users\Admin\AppData\Local\Temp\Payment doc747322.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:240
    • C:\Users\Admin\AppData\Local\Temp\Payment doc747322.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: RenamesItself
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1748
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
        dw20.exe -x -s 1004
        3⤵
          PID:1168

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1168-4-0x0000000000000000-mapping.dmp

    • memory/1168-5-0x0000000001EE0000-0x0000000001EF1000-memory.dmp

      Filesize

      68KB

    • memory/1748-0-0x0000000000400000-0x000000000046E000-memory.dmp

      Filesize

      440KB

    • memory/1748-1-0x000000000046861E-mapping.dmp

    • memory/1748-2-0x0000000000400000-0x000000000046E000-memory.dmp

      Filesize

      440KB

    • memory/1748-3-0x0000000000400000-0x000000000046E000-memory.dmp

      Filesize

      440KB