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Analysis

  • max time kernel
    142s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    16/07/2020, 07:18

General

  • Target

    Dekont.exe

  • Size

    694KB

  • MD5

    9e8bd6819de523a6012332c81f2b84e0

  • SHA1

    af4b5ba18445366f1afa7e4c67ea7a1c9382b48e

  • SHA256

    01da17c9c2c55ea880f5f2d1d1b845d2f534b8fe411bc2ad18e4dba6e24a292f

  • SHA512

    1688ff174fd080a820c58ab9d7a0e667f457d80c2a74c76ae0f37f92dfcff2e1a9b7c313e165ea441160d5a1ca01ec4ad031bdc552afef5e590fcb93240493b8

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.decoplanet.net
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ayla1939

Signatures

  • AgentTesla

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

  • AgentTesla Payload 7 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 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.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Dekont.exe
    "C:\Users\Admin\AppData\Local\Temp\Dekont.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:888
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v application /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\application.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1796
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v application /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\application.exe"
        3⤵
        • Adds Run key to start application
        PID:1724
    • C:\Users\Admin\AppData\Roaming\application.exe
      "C:\Users\Admin\AppData\Roaming\application.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:656
      • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
        "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1624

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1624-14-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1624-17-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1624-18-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB