Analysis

  • max time kernel
    130s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    10-07-2020 07:02

General

  • Target

    2020quotation.exe

  • Size

    571KB

  • MD5

    d7e71fd11bcd87a59da8b00143883adb

  • SHA1

    6b7f4c2f64c01e2bd10a0c0a9cee0f54d4bb7755

  • SHA256

    3ce9849a8dac1e1dbc85706d28667072289247e2ecd262134b9e014a939d6310

  • SHA512

    57738549c3fb4485381d04c973ccc630a645c6806a8a79a9021b6f5392aa77654bef04af5466a75bdbdef87db549f049f18caf5894315afe11767be1dd40bd18

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.privateemail.com
  • Port:
    587
  • Username:
    maka@fuzetec-tw.com
  • Password:
    mmm777

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 IoCs
  • Drops file in Drivers directory 1 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.

  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2020quotation.exe
    "C:\Users\Admin\AppData\Local\Temp\2020quotation.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1152
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\rzKmbZ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp87F3.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1296
    • C:\Users\Admin\AppData\Local\Temp\2020quotation.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1784

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp87F3.tmp
    MD5

    935e2988cc3558d71df9625b1d98b14f

    SHA1

    49db4a89dc3fbf06c6c0c93672ced0e663f26d9b

    SHA256

    8efe50ca50fdd6660ee7dac9ab38eaed7098001929c21acc65509c8a692d1ce2

    SHA512

    6bbca5de2f1ab017bb19c5c5d97ef642e71997cec3f182304f2168095d95c9331d76e09c13f46f88aac68c7245b16e644d12c9174f3a4f0f868f0b45664b74f1

  • memory/1152-1-0x0000000000000000-0x0000000000000000-disk.dmp
  • memory/1296-2-0x0000000000000000-mapping.dmp
  • memory/1784-4-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1784-5-0x00000000004482AE-mapping.dmp
  • memory/1784-6-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1784-7-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB