Analysis

  • max time kernel
    145s
  • max time network
    91s
  • platform
    windows10_x64
  • resource
    win10v200430
  • submitted
    09-07-2020 22:17

General

  • Target

    tt.exe

  • Size

    705KB

  • MD5

    a7a9aeda71108fa719cfd5085113eab3

  • SHA1

    49ed7d59f5f148622c8359c5d6934e54af1f23ee

  • SHA256

    4ff6913b35226527d4bb0bd458d326ad3d1bdd50b90aaac6d4eae1f7f43922c1

  • SHA512

    2a23544e966d0175043c23b28858f9fcdfeb49a2c92069905e12cb0081f95a0323d9f7272644fc059d2ede8e532577cbabcf1e82eae88ee69c12c3df0ec10b50

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    amazing-cool.com
  • Port:
    25
  • Username:
    [email protected]
  • Password:
    cobol888

Signatures

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

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

  • Suspicious use of WriteProcessMemory 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Adds Run entry to start application 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • AgentTesla

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

  • Drops file in Drivers directory 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tt.exe
    "C:\Users\Admin\AppData\Local\Temp\tt.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    • Suspicious use of SetThreadContext
    PID:1008
    • C:\Users\Admin\AppData\Local\Temp\tt.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Adds Run entry to start application
      • Drops file in Drivers directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious behavior: RenamesItself
      PID:2148

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\tt.exe.log

  • memory/2148-0-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/2148-1-0x000000000044963E-mapping.dmp