Overview

overview

10

Static

static

84ab9432b7...9f.exe

windows7_x64

10

84ab9432b7...9f.exe

windows10_x64

10

Analysis

  • max time kernel
    119s
  • max time network
    143s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    13/12/2021, 17:09

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General

  • Target
    84ab9432b7760a2675098f27fa8a309f.exe
  • Size 221KB
  • Sample211213-vn5cssfaem
  • SHA256 9f02bd2c75cbc7ead82a60f88f3e1f04ce9cc9d9ce715ec880f520b005fbfe25
  • MD5 SHA1 SHA512
Score
10/10
arkeidiscoveryspywarestealersuricata

Malware Config

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

    stealerarkei
  • suricata: ET MALWARE Win32/Vidar Variant Stealer CnC Exfil

    suricata: ET MALWARE Win32/Vidar Variant Stealer CnC Exfil

    suricata
  • Arkei Stealer Payload 2 IoCs
    stealer
  • Downloads MZ/PE file
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    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
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\84ab9432b7760a2675098f27fa8a309f.exe
    "C:\Users\Admin\AppData\Local\Temp\84ab9432b7760a2675098f27fa8a309f.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1816
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\84ab9432b7760a2675098f27fa8a309f.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2636
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:2788

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1816-116-0x0000000000AA0000-0x0000000000ABC000-memory.dmp
        Download

        memory/1816-115-0x0000000000940000-0x0000000000A8A000-memory.dmp
        Download

        memory/1816-117-0x0000000000400000-0x0000000000829000-memory.dmp
        Download