Overview

overview

10

Static

static

nass.exe

windows7_x64

10

nass.exe

windows10_x64

10

Analysis

  • max time kernel
    149s
  • max time network
    139s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    09/11/2020, 19:34

Sharing

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General

  • Target
    nass.exe
  • Size 878KB
  • Sample201109-stpvtws6sn
  • SHA256 addd4ba4b4aa754501d638cbbf3c78bec538ca15a72acb5eadc7babfaecfa350
  • MD5 SHA1 SHA512
Score
10/10
formbookpersistenceratspywarestealertrojan

Malware Config

Extracted

Family

  • formbook

C2

  • http://www.mansiobok2.info/mnf3/

Decoy

  • tech-d.info

  • ultra-dance.net

  • csssecurity.net

  • alanmoralesloyola.com

  • aqualityfilters.com

  • rustylimbs.com

  • ziyi119.com

  • appliedpsu.com

  • chocolatespeakeasy.com

  • workoutfashionwear.com

  • integrityrockstars.com

  • patryanotsegodistrict5.com

  • desertshieldpainting.com

  • cnqr-global-master.com

  • gestoriainigo.com

  • bigdatacd.com

  • eterna-med.com

  • mysundaymornings.com

  • xn--289aw8k.com

  • handykrafty.com

Signatures

  • Formbook

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

    trojanspywarestealerformbook
  • Formbook Payload 1 IoCs
    rat
  • Reads user/profile data of web browsers 2 TTPs

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

    spyware
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Suspicious behavior: EnumeratesProcesses 58 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:3020
    • C:\Users\Admin\AppData\Local\Temp\nass.exe
      "C:\Users\Admin\AppData\Local\Temp\nass.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      PID:3980
    • C:\Windows\SysWOW64\raserver.exe
      "C:\Windows\SysWOW64\raserver.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2188
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Admin\AppData\Local\Temp\nass.exe"
        3⤵
          PID:3140

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/2188-2-0x0000000000860000-0x000000000087F000-memory.dmp
          Download

          memory/2188-3-0x0000000000860000-0x000000000087F000-memory.dmp
          Download

          memory/2188-5-0x00000000055E0000-0x00000000056CD000-memory.dmp
          Download