Overview

overview

10

Static

static

Memorandum.exe

windows7_x64

10

Memorandum.exe

windows10_x64

10

Analysis

  • max time kernel
    146s
  • max time network
    144s
  • platform
    windows10_x64
  • resource
    win10v200430
  • submitted
    09-07-2020 14:27

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General

  • Target

    Memorandum.exe

  • Size

    654KB

  • MD5

    6ee086f9280e9b6dd55baeb5d247b8fc

  • SHA1

    5492172488c392f929acb9b7cd775f940841eff0

  • SHA256

    5749af95d51ba8e5d08b5724c8806a4e9fdd137ad4424ca2dd6f025a2662b421

  • SHA512

    922be9587b623bae08f20eda65cc0ef7ce2960c3ebfee6a22709bf3976b0a1a553bcfd72fa7304b59bb1ba680d219537fe1c8bdd47c6833c039f3c09cd20b6e5

Score
10/10
spywaretrojanstealerformbookpersistence

Malware Config

Signatures

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Reads user/profile data of web browsers 2 TTPs

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

    spyware
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Adds Run entry to start application 2 TTPs 2 IoCs
    persistence
  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

    trojanspywarestealerformbook
  • Suspicious behavior: EnumeratesProcesses 60 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • Suspicious behavior: MapViewOfSection 8 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious use of WriteProcessMemory
    • Suspicious use of AdjustPrivilegeToken
    PID:2996
    • C:\Users\Admin\AppData\Local\Temp\Memorandum.exe
      "C:\Users\Admin\AppData\Local\Temp\Memorandum.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetThreadContext
      PID:3848
      • C:\Users\Admin\AppData\Local\Temp\Memorandum.exe
        "C:\Users\Admin\AppData\Local\Temp\Memorandum.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        PID:2036
    • C:\Windows\SysWOW64\chkdsk.exe
      "C:\Windows\SysWOW64\chkdsk.exe"
      2⤵
      • Modifies Internet Explorer settings
      • Enumerates system info in registry
      • Drops file in Program Files directory
      • Adds Run entry to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      PID:756
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Admin\AppData\Local\Temp\Memorandum.exe"
        3⤵
          PID:1512
        • C:\Windows\SysWOW64\cmd.exe
          /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
          3⤵
            PID:3740
          • C:\Program Files\Mozilla Firefox\Firefox.exe
            "C:\Program Files\Mozilla Firefox\Firefox.exe"
            3⤵
              PID:3660

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Initial Access

        Execution

        Persistence

        Registry Run Keys / Startup Folder

        1
        T1060

        Privilege Escalation

        Defense Evasion

        Modify Registry

        2
        T1112

        Credential Access

        Credentials in Files

        1
        T1081

        Discovery

        Query Registry

        1
        T1012

        System Information Discovery

        1
        T1082

        Lateral Movement

        Collection

        Data from Local System

        1
        T1005

        Exfiltration

        Command and Control

        Impact

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\DB1
          Download Submit
        • C:\Users\Admin\AppData\Roaming\79OQ87VU\79Ologim.jpeg
          Download Submit
        • C:\Users\Admin\AppData\Roaming\79OQ87VU\79Ologrf.ini
          Download Submit
        • C:\Users\Admin\AppData\Roaming\79OQ87VU\79Ologrg.ini
          Download Submit
        • C:\Users\Admin\AppData\Roaming\79OQ87VU\79Ologri.ini
          Download Submit
        • C:\Users\Admin\AppData\Roaming\79OQ87VU\79Ologrv.ini
          Download Submit
        • memory/756-4-0x0000000000C00000-0x0000000000C0A000-memory.dmp
          Filesize

          40KB

          Download
        • memory/756-3-0x0000000000C00000-0x0000000000C0A000-memory.dmp
          Filesize

          40KB

          Download
        • memory/756-2-0x0000000000000000-mapping.dmp
          Download
        • memory/1512-5-0x0000000000000000-mapping.dmp
          Download
        • memory/2036-0-0x0000000000400000-0x000000000042D000-memory.dmp
          Filesize

          180KB

          Download
        • memory/2036-1-0x000000000041E350-mapping.dmp
          Download
        • memory/3660-11-0x0000000000000000-mapping.dmp
          Download
        • memory/3660-12-0x00007FF6A8DD0000-0x00007FF6A8E63000-memory.dmp
          Filesize

          588KB

          Download
        • memory/3660-13-0x00007FF6A8DD0000-0x00007FF6A8E63000-memory.dmp
          Filesize

          588KB

          Download
        • memory/3660-14-0x00007FF6A8DD0000-0x00007FF6A8E63000-memory.dmp
          Filesize

          588KB

          Download
        • memory/3740-8-0x0000000000000000-mapping.dmp
          Download