Overview

overview

10

Static

static

6994051a10...20.exe

windows7_x64

10

6994051a10...20.exe

windows10_x64

10

Analysis

  • max time kernel
    121s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    21/11/2021, 16:01

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General

  • Target
    6994051a1091c2a5a64fb4b330806320.exe
  • Size 1.9MB
  • Sample211121-tf782sebal
  • SHA256 d1061d18dc4ceceeba9947137e84e68d689e7befb6f038b467a64c474d0c51d0
  • MD5 SHA1 SHA512
Score
10/10
vidar869discoveryspywarestealersuricata

Malware Config

Extracted

Family

  • vidar

Version

  • 48.6

Botnet

  • 869

C2

  • https://mastodon.online/@valhalla

  • https://koyu.space/@valhalla

Attributes
  • profile_id

    869

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

    stealervidar
  • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    suricata
  • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    suricata
  • Vidar Stealer 2 IoCs
    stealer
  • Downloads MZ/PE file
  • 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
  • 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\6994051a1091c2a5a64fb4b330806320.exe
    "C:\Users\Admin\AppData\Local\Temp\6994051a1091c2a5a64fb4b330806320.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3548
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im 6994051a1091c2a5a64fb4b330806320.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\6994051a1091c2a5a64fb4b330806320.exe" & del C:\ProgramData\*.dll & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4344
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im 6994051a1091c2a5a64fb4b330806320.exe /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:436
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:3760

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/3548-118-0x0000000000780000-0x00000000007A3000-memory.dmp
        Download

        memory/3548-119-0x0000000002A10000-0x0000000002AE7000-memory.dmp
        Download

        memory/3548-120-0x0000000000400000-0x00000000005E1000-memory.dmp
        Download