Overview

overview

10

Static

static

Tax Invoic...40.exe

windows7_x64

10

Tax Invoic...40.exe

windows10_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    29-12-2020 07:07

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General

  • Target

    Tax Invoices IN102738 IN102739 IN102740.exe

  • Size

    934KB

  • MD5

    30db124ff404f295e6828615ceffd149

  • SHA1

    9a36a1df328103d28eba4bdb4eb7fce4241e41a3

  • SHA256

    13da94ec76f6fd3fba14bbaca306ee7fd26fe8ddd40858d63f639a97d3807226

  • SHA512

    50333e3a99fe70ad3ce42eaec9b678eac525bf38b7847755367e7eecab4a9f4deadbbf6a59bda2e022bd060e0e7b97de60cd6dd228a204f3567b90f907b6c917

Score
10/10
matiexkeyloggerstealer

Malware Config

Extracted

Family

matiex

Credentials

  • Protocol:     smtp
  • Host:
    mail.zavidovici.ba
  • Port:
    587
  • Username:
    opcina.zavidovici@zavidovici.ba
  • Password:
    12Opc21!

Signatures

  • Matiex

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

    stealerkeyloggermatiex
  • Matiex Main Payload 4 IoCs
  • Looks up external IP address via web service 3 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Tax Invoices IN102738 IN102739 IN102740.exe
    "C:\Users\Admin\AppData\Local\Temp\Tax Invoices IN102738 IN102739 IN102740.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1076
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KJWimAwEnS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp34C6.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:668
    • C:\Users\Admin\AppData\Local\Temp\Tax Invoices IN102738 IN102739 IN102740.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1324

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp34C6.tmp
    MD5

    e07d09513284386673a0ab054a46f011

    SHA1

    8a26cd8caaab1be4b7b8af0d9b960ab12a22385b

    SHA256

    5e164d85a2da55a6648491c4496074a6cb8b22eef353f72ecb9a51815d93c758

    SHA512

    f626e314ae749f3d97152d227d25a67fa5bde92367202fc3f9bd08cae2087a78ec340ee1b72753e442fd1e4916a6d4e1c219366a6a695d53ee0d06207f923149

    Download Submit
  • memory/668-7-0x0000000000000000-mapping.dmp
    Download
  • memory/1076-2-0x0000000074710000-0x0000000074DFE000-memory.dmp
    Filesize

    6.9MB

    Download
  • memory/1076-3-0x0000000000CC0000-0x0000000000CC1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/1076-5-0x0000000000610000-0x0000000000614000-memory.dmp
    Filesize

    16KB

    Download
  • memory/1076-6-0x0000000007B70000-0x0000000007C14000-memory.dmp
    Filesize

    656KB

    Download
  • memory/1324-9-0x0000000000400000-0x0000000000476000-memory.dmp
    Filesize

    472KB

    Download
  • memory/1324-10-0x000000000047036E-mapping.dmp
    Download
  • memory/1324-11-0x0000000000400000-0x0000000000476000-memory.dmp
    Filesize

    472KB

    Download
  • memory/1324-12-0x0000000000400000-0x0000000000476000-memory.dmp
    Filesize

    472KB

    Download
  • memory/1324-13-0x0000000074690000-0x0000000074D7E000-memory.dmp
    Filesize

    6.9MB

    Download