Analysis

  • max time kernel
    72s
  • max time network
    53s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    30-06-2020 06:46

General

  • Target

    200004396.exe

  • Size

    399KB

  • MD5

    7e90e5f5106e876f9f080b224cbc069d

  • SHA1

    8e52b1163bcc86538aa8beb66166cba9c1ee426c

  • SHA256

    7ac2dee76520e25a21918a6ee79eedaf1a9de51aaee643d21d9cf6346451555e

  • SHA512

    4f60c309c6abb4757b68261736a4ab0eb14252316ee673e872080c323a89be6761139b0e95fdafdc8eb05e14a99aa74d21c735a35182f808fcb76f3eb12f2d0f

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.ru
  • Port:
    587
  • Username:
    f.grac3@yandex.ru
  • Password:
    HYBRID@@@

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.

  • 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 WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\200004396.exe
    "C:\Users\Admin\AppData\Local\Temp\200004396.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1156
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OegXSQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA62D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1372
    • C:\Users\Admin\AppData\Local\Temp\200004396.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1580

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\tmpA62D.tmp
    MD5

    8628f0de23647c75dee123b4313567d0

    SHA1

    60223a776721573df11528022fdd51299f8167f5

    SHA256

    6dc1d8527e66d213b4631f98166b2c124184b09b94989d827be9caeaf427b0bf

    SHA512

    3629b7d81d81d93a51cc1940b32092538fb1117bce419063c46fdf4dacdb7ce7a7d3d471837ab3fd698bc89769482ff687b6326a3e80a08872116d311e042643

  • memory/1372-0-0x0000000000000000-mapping.dmp
  • memory/1580-2-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1580-3-0x0000000000446A4E-mapping.dmp
  • memory/1580-4-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1580-5-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB