Resubmissions

23-10-2021 15:52

211023-tbkbesdcfm 10

22-10-2021 17:40

211022-v8trsscggr 10

22-10-2021 15:55

211022-tc9ygacgan 10

22-10-2021 14:38

211022-rz1bfabgb8 10

Analysis

  • max time kernel
    18s
  • max time network
    30s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    23-10-2021 15:52

General

  • Target

    Fri051e1e7444.exe

  • Size

    403KB

  • MD5

    b4c503088928eef0e973a269f66a0dd2

  • SHA1

    eb7f418b03aa9f21275de0393fcbf0d03b9719d5

  • SHA256

    2a95ce43c87b8a26be71a459eae796a572422bd99cf0b9a3580a3a68e7dbd1a2

  • SHA512

    c6fe2e2b5fbf9348701d1721f2b7ac7589b04b0308ae152e3a7186692b14f35e55bc7eed0c94a03031837b6f2b6aa4dc8d094aefce02913f1fbc4dedea452465

Malware Config

Signatures

  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • suricata: ET MALWARE Win32/Unk.HRESQ! MultiDownloader Checkin

    suricata: ET MALWARE Win32/Unk.HRESQ! MultiDownloader Checkin

  • Downloads MZ/PE file
  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Fri051e1e7444.exe
    "C:\Users\Admin\AppData\Local\Temp\Fri051e1e7444.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2728
    • C:\Users\Admin\Pictures\Adobe Films\PBKC4FSzUmP9Amt9zM0e30i8.exe
      "C:\Users\Admin\Pictures\Adobe Films\PBKC4FSzUmP9Amt9zM0e30i8.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:1268
    • C:\Users\Admin\Pictures\Adobe Films\kQYSgQbaI1fTU2hDNoPyd5F8.exe
      "C:\Users\Admin\Pictures\Adobe Films\kQYSgQbaI1fTU2hDNoPyd5F8.exe"
      2⤵
      • Executes dropped EXE
      PID:588
    • C:\Users\Admin\Pictures\Adobe Films\TOOohBs_93T5x4WAmod17EPW.exe
      "C:\Users\Admin\Pictures\Adobe Films\TOOohBs_93T5x4WAmod17EPW.exe"
      2⤵
      • Executes dropped EXE
      PID:1480
    • C:\Users\Admin\Pictures\Adobe Films\Us8e0srz63aTs_Cvlt4RfbAD.exe
      "C:\Users\Admin\Pictures\Adobe Films\Us8e0srz63aTs_Cvlt4RfbAD.exe"
      2⤵
        PID:1072
      • C:\Users\Admin\Pictures\Adobe Films\Hr1rsTF2JgD8IUzT_IBMiwfa.exe
        "C:\Users\Admin\Pictures\Adobe Films\Hr1rsTF2JgD8IUzT_IBMiwfa.exe"
        2⤵
          PID:1616

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/2728-115-0x0000000006130000-0x000000000627A000-memory.dmp

        Filesize

        1.3MB