Analysis

  • max time kernel
    4265064s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    17/01/2022, 10:27

General

  • Target

    3443c50a3f82c68489c42f416079135d.exe

  • Size

    280KB

  • MD5

    3443c50a3f82c68489c42f416079135d

  • SHA1

    c55d29de699a66ffc4df52dbb917e3ac40759523

  • SHA256

    85dd04331f4c472e795d3cd3fbd9f6fd165b05af55aa94d429a2c90d56c46227

  • SHA512

    b03eb8159c2edf8f17c14e32e48de2673a4a1cd4fc27345af16bbb161ddd4bc1a2bc2a5a392819dc50644e0ccfc47d16372d3d2ccec36860d6569b75c6398ca8

Malware Config

Extracted

Family

arkei

Botnet

homesteadr

C2

http://homesteadr.link/ggate.php

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs
  • Arkei Stealer Payload 2 IoCs
  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 7 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3443c50a3f82c68489c42f416079135d.exe
    "C:\Users\Admin\AppData\Local\Temp\3443c50a3f82c68489c42f416079135d.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:3312
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\3443c50a3f82c68489c42f416079135d.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2416
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:3592
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3312 -s 1488
      2⤵
      • Program crash
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1852
  • C:\Windows\system32\MusNotification.exe
    C:\Windows\system32\MusNotification.exe
    1⤵
    • Checks processor information in registry
    • Suspicious use of AdjustPrivilegeToken
    PID:1016
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3312 -ip 3312
    1⤵
    • Suspicious use of NtCreateProcessExOtherParentProcess
    • Suspicious use of WriteProcessMemory
    PID:1000

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/3312-130-0x0000000000668000-0x0000000000679000-memory.dmp

          Filesize

          68KB

        • memory/3312-132-0x0000000000400000-0x00000000005D0000-memory.dmp

          Filesize

          1.8MB

        • memory/3312-131-0x0000000000780000-0x000000000079C000-memory.dmp

          Filesize

          112KB