Overview

overview

10

Static

static

1fb95294df...4d.exe

windows7_x64

10

1fb95294df...4d.exe

windows10_x64

10

Analysis

  • max time kernel
    76s
  • max time network
    94s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    28/09/2021, 05:41

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General

  • Target
    1fb95294df3d463f1981ae531649da4d.exe
  • Size 714KB
  • Sample210928-gdfd2aafhj
  • SHA256 65f1e5b32db850c1ea19a06cb9ed4291d2b97633e890a998f4f4a4a90bb31cd5
  • MD5 SHA1 SHA512
Score
10/10
vidardiscoveryspywarestealersuricata

Malware Config

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
  • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    suricata
  • Vidar Stealer 2 IoCs
    stealer
  • Downloads MZ/PE file
  • Deletes itself 1 IoCs
  • Loads dropped DLL 4 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1fb95294df3d463f1981ae531649da4d.exe
    "C:\Users\Admin\AppData\Local\Temp\1fb95294df3d463f1981ae531649da4d.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1596
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im 1fb95294df3d463f1981ae531649da4d.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\1fb95294df3d463f1981ae531649da4d.exe" & del C:\ProgramData\*.dll & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:568
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im 1fb95294df3d463f1981ae531649da4d.exe /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1800
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:1992

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1596-53-0x00000000757B1000-0x00000000757B3000-memory.dmp
        Download

        memory/1596-54-0x0000000002D70000-0x0000000002E44000-memory.dmp
        Download

        memory/1596-55-0x0000000000400000-0x0000000002BFC000-memory.dmp
        Download