Overview

overview

10

Static

static

b123.exe

windows7_x64

10

b123.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    112s
  • max time network
    115s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220310-en
  • submitted
    22/03/2022, 22:50

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General

  • Target
    b123.exe
  • Size 229KB
  • Sample220322-2sagjsfhcn
  • SHA256 7022a16d455a3ad78d0bbeeb2793cb35e48822c3a0a8d9eaa326ffc91dd9e625
  • MD5 SHA1 SHA512
Score
10/10
arkeidefaultdiscoveryspywarestealersuricata

Malware Config

Extracted

Family

  • arkei

Botnet

  • Default

C2

  • http://sughicent.com/blaka.php

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

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

    suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil

    suricata
  • 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 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\b123.exe
    "C:\Users\Admin\AppData\Local\Temp\b123.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:5104
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b123.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:804
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:4764

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/5104-134-0x0000000002180000-0x00000000021A9000-memory.dmp
        Download

        memory/5104-135-0x0000000000400000-0x000000000043C000-memory.dmp
        Download

        memory/5104-136-0x0000000060900000-0x0000000060992000-memory.dmp
        Download