Resubmissions

03-02-2022 14:53

220203-r9cm5aafd8 10

28-01-2022 20:48

220128-zlgaeadef8 10

Analysis

  • max time kernel
    153s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    03-02-2022 14:53

General

  • Target

    FACTURA-9vUVHazo9RuSJpH.exe

  • Size

    1.1MB

  • MD5

    92955191ebfb02ef2f3fe33dbd6094ca

  • SHA1

    2fecac06772d210574f44bfef91aeae8f0860a31

  • SHA256

    c744fe5aa2ab646ac1a0583348316b13bf7ad12435edeb658aa5e0f09e494b89

  • SHA512

    77d0354e0ba06d826810e50bd78898da79efe102ece81eac3fdd46cd60c57f8c9192ea805f945c1d76181d524eb859409bcc82ea7143a5d4f8a210e737540b01

Malware Config

Extracted

Family

matiex

Credentials

  • Protocol:
    smtp
  • Host:
    serv3.devmexico.com
  • Port:
    587
  • Username:
    reservaciones@hoteljuaninos.com.mx
  • Password:
    3}l^pI#_4K_!
  • Email To:
    saleseuropower2@yandex.com

Signatures

  • Matiex

    Matiex is a keylogger and infostealer first seen in July 2020.

  • Matiex Main Payload 1 IoCs
  • Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs
  • Sets service image path in registry 2 TTPs
  • 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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\FACTURA-9vUVHazo9RuSJpH.exe
    "C:\Users\Admin\AppData\Local\Temp\FACTURA-9vUVHazo9RuSJpH.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3676
    • C:\Users\Admin\AppData\Local\Temp\FACTURA-9vUVHazo9RuSJpH.exe
      "C:\Users\Admin\AppData\Local\Temp\FACTURA-9vUVHazo9RuSJpH.exe"
      2⤵
        PID:3860
      • C:\Users\Admin\AppData\Local\Temp\FACTURA-9vUVHazo9RuSJpH.exe
        "C:\Users\Admin\AppData\Local\Temp\FACTURA-9vUVHazo9RuSJpH.exe"
        2⤵
        • Accesses Microsoft Outlook profiles
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:3032
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3032 -s 1696
          3⤵
          • Program crash
          PID:1200
    • C:\Windows\system32\MusNotifyIcon.exe
      %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
      1⤵
      • Checks processor information in registry
      PID:3644
    • C:\Windows\System32\WaaSMedicAgent.exe
      C:\Windows\System32\WaaSMedicAgent.exe d1da5cb5d442236809729109bd6c2b85 VEKkGeTnokKB+WGexLHxbg.0.1.0.0.0
      1⤵
      • Modifies data under HKEY_USERS
      PID:3456
    • C:\Windows\System32\svchost.exe
      C:\Windows\System32\svchost.exe -k NetworkService -p
      1⤵
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      PID:3924
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3032 -ip 3032
      1⤵
      • Suspicious use of NtCreateProcessExOtherParentProcess
      • Suspicious use of WriteProcessMemory
      PID:4068

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    2
    T1081

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    2
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/3032-136-0x0000000000400000-0x0000000000472000-memory.dmp
      Filesize

      456KB

    • memory/3032-137-0x00000000059B0000-0x0000000005A16000-memory.dmp
      Filesize

      408KB

    • memory/3032-138-0x0000000005940000-0x0000000005EE4000-memory.dmp
      Filesize

      5.6MB

    • memory/3032-139-0x0000000006F60000-0x0000000007122000-memory.dmp
      Filesize

      1.8MB

    • memory/3676-130-0x0000000000670000-0x000000000078A000-memory.dmp
      Filesize

      1.1MB

    • memory/3676-131-0x0000000005630000-0x0000000005BD4000-memory.dmp
      Filesize

      5.6MB

    • memory/3676-132-0x0000000005120000-0x00000000051B2000-memory.dmp
      Filesize

      584KB

    • memory/3676-133-0x0000000005080000-0x0000000005624000-memory.dmp
      Filesize

      5.6MB

    • memory/3676-134-0x00000000051D0000-0x00000000051DA000-memory.dmp
      Filesize

      40KB

    • memory/3676-135-0x0000000007720000-0x00000000077BC000-memory.dmp
      Filesize

      624KB