Analysis

  • max time kernel
    110s
  • max time network
    125s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    15/01/2022, 11:27

General

  • Target

    16ed57d6423603a522ba94bab37d92e3cf795420b929e6dcf9b4477f9ec79c04.exe

  • Size

    316KB

  • MD5

    a3619e91fa1245858d34030236ec696b

  • SHA1

    340d0ea5548b85ff429ae7102097c1b75160d236

  • SHA256

    16ed57d6423603a522ba94bab37d92e3cf795420b929e6dcf9b4477f9ec79c04

  • SHA512

    df550b2351ce208c159fd4f71433e463282b8ca5fd4831e8ca287d6867935b9dd3c40718953352c9e5bea143c7ecfeb39efe7179f59de830a7adb7c887617512

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://file-file-host4.com/tratata.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\16ed57d6423603a522ba94bab37d92e3cf795420b929e6dcf9b4477f9ec79c04.exe
    "C:\Users\Admin\AppData\Local\Temp\16ed57d6423603a522ba94bab37d92e3cf795420b929e6dcf9b4477f9ec79c04.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:860
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\16ed57d6423603a522ba94bab37d92e3cf795420b929e6dcf9b4477f9ec79c04.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1488
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:2376

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/860-116-0x00000000008CA000-0x00000000008DB000-memory.dmp

          Filesize

          68KB

        • memory/860-117-0x00000000007D0000-0x00000000007EC000-memory.dmp

          Filesize

          112KB

        • memory/860-118-0x0000000000400000-0x000000000055F000-memory.dmp

          Filesize

          1.4MB