Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    21-10-2021 11:21

General

  • Target

    pedido urgente pdf.exe

  • Size

    973KB

  • MD5

    42c8d23c057b69d3059dfd7bb4af736e

  • SHA1

    a5f7fe4e31d69c1e452f513ba79b57ef57079b23

  • SHA256

    d90b2ee420fc51d84a0c3c3fe2ae4e13b6313cd030be264440538a396dfe7956

  • SHA512

    b524f68ed82306acbc3422f6475071bb05e3c9e72510a70784e08f9b2561b962beba6847e4679bd24247c7899e84b7799b2f1171decab195a456e181725f3ad6

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

n7ak

C2

http://www.kmresults.com/n7ak/

Decoy

modischoolcbse.com

theneverwinter.com

rszkjx-vps-hosting.website

fnihil.com

1pbet.com

nnowzscorrez.com

uaotgvjl.icu

starmapsqatar.com

ekisilani.com

extradeepsheets.com

jam-nins.com

buranly.com

orixentertainment.com

rawtech.energy

myol.guru

utex.club

jiapie.com

wowig.store

wweidlyyl.com

systaskautomation.com

Signatures

  • Formbook

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

  • suricata: ET MALWARE FormBook CnC Checkin (GET)

    suricata: ET MALWARE FormBook CnC Checkin (GET)

  • Formbook Payload 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 56 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:3056
    • C:\Users\Admin\AppData\Local\Temp\pedido urgente pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\pedido urgente pdf.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:2668
      • C:\Windows\SysWOW64\secinit.exe
        C:\Windows\System32\secinit.exe
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:1984
    • C:\Windows\SysWOW64\raserver.exe
      "C:\Windows\SysWOW64\raserver.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:588
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Windows\SysWOW64\secinit.exe"
        3⤵
          PID:1040

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/588-124-0x0000000000000000-mapping.dmp
    • memory/588-129-0x0000000004350000-0x00000000043E3000-memory.dmp
      Filesize

      588KB

    • memory/588-128-0x00000000044E0000-0x0000000004800000-memory.dmp
      Filesize

      3.1MB

    • memory/588-126-0x0000000000820000-0x000000000083F000-memory.dmp
      Filesize

      124KB

    • memory/588-127-0x0000000002C00000-0x0000000002C2E000-memory.dmp
      Filesize

      184KB

    • memory/1040-125-0x0000000000000000-mapping.dmp
    • memory/1984-119-0x0000000072480000-0x00000000724AE000-memory.dmp
      Filesize

      184KB

    • memory/1984-122-0x0000000001000000-0x0000000001014000-memory.dmp
      Filesize

      80KB

    • memory/1984-120-0x00000000046A0000-0x00000000049C0000-memory.dmp
      Filesize

      3.1MB

    • memory/1984-118-0x0000000000C30000-0x0000000000C31000-memory.dmp
      Filesize

      4KB

    • memory/1984-117-0x0000000000000000-mapping.dmp
    • memory/2668-115-0x0000000000670000-0x0000000000671000-memory.dmp
      Filesize

      4KB

    • memory/2668-116-0x0000000000691000-0x00000000006A5000-memory.dmp
      Filesize

      80KB

    • memory/3056-123-0x0000000006140000-0x00000000062C6000-memory.dmp
      Filesize

      1.5MB

    • memory/3056-130-0x00000000022B0000-0x0000000002348000-memory.dmp
      Filesize

      608KB