Overview

overview

10

Static

static

eufive_202...25.exe

windows7_x64

10

eufive_202...25.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    89s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    23/02/2022, 16:05

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General

  • Target
    eufive_20220223-141225.exe
  • Size 659KB
  • Sample220223-tjsb1aaga4
  • SHA256 5881b4236ed90b61498c527b0798c7d8591de80ff64bc9b9ec993ca712497b00
  • MD5 SHA1 SHA512
Score
10/10
vidar565discoveryspywarestealer

Malware Config

Extracted

Family

  • vidar

Version

  • 50.3

Botnet

  • 565

C2

  • https://mastodon.social/@kill5rnax

  • https://noc.social/@kill6nix

Attributes
  • profile_id

    565

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

    stealervidar
  • Vidar Stealer 2 IoCs
    stealer
  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Accesses 2FA software files, possible credential harvesting 2 TTPs
    spywarestealer
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
    spyware
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\eufive_20220223-141225.exe
    "C:\Users\Admin\AppData\Local\Temp\eufive_20220223-141225.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3600
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im eufive_20220223-141225.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\eufive_20220223-141225.exe" & del C:\ProgramData\*.dll & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2596
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im eufive_20220223-141225.exe /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2212
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:2036

Network

        MITRE ATT&CK Enterprise v6

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        Downloads

        memory/3600-130-0x0000000000768000-0x00000000007D4000-memory.dmp
        Download

        memory/3600-131-0x0000000000768000-0x00000000007D4000-memory.dmp
        Download

        memory/3600-132-0x0000000002120000-0x00000000021CC000-memory.dmp
        Download

        memory/3600-133-0x0000000000400000-0x00000000004B0000-memory.dmp
        Download