Overview

overview

10

Static

static

10

Ekstre.exe

windows7_x64

10

Ekstre.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    122s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 05:09

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General

  • Target

    Ekstre.exe

  • Size

    1.2MB

  • MD5

    4fa8f3fb34c79b408d7c511c892358cf

  • SHA1

    eded4cc6941f2ebf7d9b08bc98d05190c4d9e054

  • SHA256

    9343011118ad09e9a63a24adb5cc08f406ffc927230b1be998cb263ebf23eedd

  • SHA512

    832d9aaa4806edfdafba5fbcd6b46be87a9432ba5f56328b8254a8a8c2d0d5176a0eb2570c3fa36c0e0a94c27f9d28165e824bcd7249defabac6454b963633a8

Score
10/10
massloggercollectionpersistenceransomwarespywarestealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\781F780B4E\Log.txt

Family

masslogger

Ransom Note
<|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 10 Pro 64bit Windows Serial Key: W269N-WFGWX-YVC9B-4J6C9-T83GX CPU: Intel Core Processor (Broadwell) GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/20/2022 5:46:36 AM MassLogger Started: 5/20/2022 5:46:33 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RegAsm.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Downloader ||> Disabled <|| USB Spread ||> Disabled <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> Disabled

Signatures

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

    stealerspywaremasslogger
  • MassLogger Main Payload 4 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Accesses Microsoft Outlook profiles 1 TTPs 42 IoCs
    collection
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 28 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Ekstre.exe
    "C:\Users\Admin\AppData\Local\Temp\Ekstre.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4144
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v admin /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2612
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v admin /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
        3⤵
        • Adds Run key to start application
        PID:4976
    • C:\Users\Admin\Desktop\.exe
      "C:\Users\Admin\Desktop\.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1988
      • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
        "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:4536

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

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Exfiltration

Command and Control

Impact

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    Filesize

    63KB

    MD5

    0d5df43af2916f47d00c1573797c1a13

    SHA1

    230ab5559e806574d26b4c20847c368ed55483b0

    SHA256

    c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

    SHA512

    f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

    Download Submit
  • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    Filesize

    63KB

    MD5

    0d5df43af2916f47d00c1573797c1a13

    SHA1

    230ab5559e806574d26b4c20847c368ed55483b0

    SHA256

    c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

    SHA512

    f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

    Download Submit
  • C:\Users\Admin\Desktop\.exe
    Filesize

    1.2MB

    MD5

    4fa8f3fb34c79b408d7c511c892358cf

    SHA1

    eded4cc6941f2ebf7d9b08bc98d05190c4d9e054

    SHA256

    9343011118ad09e9a63a24adb5cc08f406ffc927230b1be998cb263ebf23eedd

    SHA512

    832d9aaa4806edfdafba5fbcd6b46be87a9432ba5f56328b8254a8a8c2d0d5176a0eb2570c3fa36c0e0a94c27f9d28165e824bcd7249defabac6454b963633a8

    Download Submit
  • C:\Users\Admin\Desktop\.exe
    Filesize

    1.2MB

    MD5

    4fa8f3fb34c79b408d7c511c892358cf

    SHA1

    eded4cc6941f2ebf7d9b08bc98d05190c4d9e054

    SHA256

    9343011118ad09e9a63a24adb5cc08f406ffc927230b1be998cb263ebf23eedd

    SHA512

    832d9aaa4806edfdafba5fbcd6b46be87a9432ba5f56328b8254a8a8c2d0d5176a0eb2570c3fa36c0e0a94c27f9d28165e824bcd7249defabac6454b963633a8

    Download Submit
  • memory/1988-135-0x0000000000000000-mapping.dmp
    Download
  • memory/2612-133-0x0000000000000000-mapping.dmp
    Download
  • memory/4144-131-0x00000000061A0000-0x0000000006744000-memory.dmp
    Filesize

    5.6MB

    Download
  • memory/4144-132-0x0000000005CE0000-0x0000000005D72000-memory.dmp
    Filesize

    584KB

    Download
  • memory/4144-130-0x0000000000B50000-0x0000000000C86000-memory.dmp
    Filesize

    1.2MB

    Download
  • memory/4536-143-0x0000000004AF0000-0x0000000004B8C000-memory.dmp
    Filesize

    624KB

    Download
  • memory/4536-138-0x0000000000000000-mapping.dmp
    Download
  • memory/4536-142-0x0000000000590000-0x000000000062A000-memory.dmp
    Filesize

    616KB

    Download
  • memory/4536-144-0x0000000004C60000-0x0000000004CC6000-memory.dmp
    Filesize

    408KB

    Download
  • memory/4536-145-0x00000000065A0000-0x00000000065AA000-memory.dmp
    Filesize

    40KB

    Download
  • memory/4536-146-0x00000000065B0000-0x0000000006600000-memory.dmp
    Filesize

    320KB

    Download
  • memory/4976-134-0x0000000000000000-mapping.dmp
    Download