Analysis

  • max time kernel
    172s
  • max time network
    185s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 01:41

General

  • Target

    1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe

  • Size

    124KB

  • MD5

    6a31f01180e6ba81424c680fe3a3a662

  • SHA1

    f6785d37cb8779dd5222397719464fc65d222b5c

  • SHA256

    1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb

  • SHA512

    1f4ae8ffc9fbd4cd04c1c1c8187eed3eba3e96596ddb6c0a0733d735d38b619b1a020d59721ebcbca2c8c9f099208f83a2cfe18e5a9c2b4c324ec73c661cd17f

Malware Config

Extracted

Family

guloader

C2

http://jkkn.ac.in/winwin.exe_encrypted.bin

xor.base64

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.qilonqchem.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    NUfMG!E2

Signatures

  • AgentTesla

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

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • AgentTesla Payload 2 IoCs
  • Guloader Payload 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.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe
    "C:\Users\Admin\AppData\Local\Temp\1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1944
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Users\Admin\AppData\Local\Temp\1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe"
      2⤵
        PID:1680
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        "C:\Users\Admin\AppData\Local\Temp\1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe"
        2⤵
        • Accesses Microsoft Outlook profiles
        • Adds Run key to start application
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • outlook_office_path
        • outlook_win_path
        PID:1168

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1168-61-0x000000000133CE5E-mapping.dmp
    • memory/1168-65-0x0000000000090000-0x0000000000190000-memory.dmp
      Filesize

      1024KB

    • memory/1168-66-0x00000000779A0000-0x0000000077B49000-memory.dmp
      Filesize

      1.7MB

    • memory/1168-67-0x0000000000400000-0x0000000000504000-memory.dmp
      Filesize

      1.0MB

    • memory/1168-68-0x0000000000400000-0x000000000044C000-memory.dmp
      Filesize

      304KB

    • memory/1944-57-0x00000000765C1000-0x00000000765C3000-memory.dmp
      Filesize

      8KB

    • memory/1944-58-0x0000000000280000-0x000000000028A000-memory.dmp
      Filesize

      40KB

    • memory/1944-59-0x00000000779A0000-0x0000000077B49000-memory.dmp
      Filesize

      1.7MB

    • memory/1944-60-0x0000000077B80000-0x0000000077D00000-memory.dmp
      Filesize

      1.5MB