Analysis

  • max time kernel
    120s
  • max time network
    124s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    17/01/2022, 09:38

General

  • Target

    b0bbd786fb3429997e5c0f31e9c7692558bebf90e94b4cc64f03d5bc6c7e63f5.exe

  • Size

    280KB

  • MD5

    9072310d9896b5a4cf3c0ce04d53d0b7

  • SHA1

    a7ac3f9cfd9c7f20973f7832cd2aae15fdc02c37

  • SHA256

    b0bbd786fb3429997e5c0f31e9c7692558bebf90e94b4cc64f03d5bc6c7e63f5

  • SHA512

    d53dd6b4651600c828616e298b5acdff1fa9a609f4a17000e4ed44e9cd63c9a4e898707c5c9ed4945ff989f319142eb582eaff7db6a327d1b347a8be62eba664

Malware Config

Extracted

Family

arkei

Botnet

homesteadr

C2

http://homesteadr.link/ggate.php

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • Arkei Stealer Payload 2 IoCs
  • 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.

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

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

  • 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
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b0bbd786fb3429997e5c0f31e9c7692558bebf90e94b4cc64f03d5bc6c7e63f5.exe
    "C:\Users\Admin\AppData\Local\Temp\b0bbd786fb3429997e5c0f31e9c7692558bebf90e94b4cc64f03d5bc6c7e63f5.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:3192
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b0bbd786fb3429997e5c0f31e9c7692558bebf90e94b4cc64f03d5bc6c7e63f5.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3720
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:1784

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/3192-117-0x0000000000400000-0x00000000005D0000-memory.dmp

          Filesize

          1.8MB

        • memory/3192-116-0x0000000000720000-0x000000000073C000-memory.dmp

          Filesize

          112KB