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Analysis

  • max time kernel
    233s
  • max time network
    310s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/05/2024, 02:34

General

  • Target

    toolspub5.exe

  • Size

    291KB

  • MD5

    29f3989b7444d45b49d6ad91f3d20515

  • SHA1

    0e399a69674d3f98c04058fda5dbdad567c5470d

  • SHA256

    e258ea5af7ad546989cff72758eb179dc37cd65bd15a378b4cfbf553994c7010

  • SHA512

    27b8cc84aefcf6dac70bcb69fb6678eabe437f3a0b66eda37f7fcfc007e49c0cd44bd7ce33b1f47ae9156efdeaffebdbbe6e737b3eb29ca3f04815d7db998c77

  • SSDEEP

    6144:0KuM4pVUTppny8SXuzvbhQJyR33pz3Ut/w:XUVUlpnaebhQMJApw

Malware Config

Extracted

Family

stealc

C2

http://okkolus.com

Attributes
  • url_path

    /cf5cbdf706840b3f.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • 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.

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

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

  • Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\toolspub5.exe
    "C:\Users\Admin\AppData\Local\Temp\toolspub5.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    PID:4616
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4616 -s 772
      2⤵
      • Program crash
      PID:1144
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=3492 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:3
    1⤵
      PID:540
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1400 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:4040
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4616 -ip 4616
        1⤵
          PID:4824

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports

          Filesize

          2B

          MD5

          d751713988987e9331980363e24189ce

          SHA1

          97d170e1550eee4afc0af065b78cda302a97674c

          SHA256

          4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

          SHA512

          b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

        • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries

          Filesize

          40B

          MD5

          20d4b8fa017a12a108c87f540836e250

          SHA1

          1ac617fac131262b6d3ce1f52f5907e31d5f6f00

          SHA256

          6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d

          SHA512

          507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

        • memory/4616-61-0x0000000002F80000-0x0000000002FA7000-memory.dmp

          Filesize

          156KB

        • memory/4616-63-0x0000000000400000-0x000000000063B000-memory.dmp

          Filesize

          2.2MB

        • memory/4616-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

          Filesize

          972KB

        • memory/4616-3-0x0000000000400000-0x000000000063B000-memory.dmp

          Filesize

          2.2MB

        • memory/4616-50-0x0000000000400000-0x0000000002B06000-memory.dmp

          Filesize

          39.0MB

        • memory/4616-60-0x0000000002C80000-0x0000000002D80000-memory.dmp

          Filesize

          1024KB

        • memory/4616-1-0x0000000002C80000-0x0000000002D80000-memory.dmp

          Filesize

          1024KB

        • memory/4616-4-0x0000000000400000-0x0000000002B06000-memory.dmp

          Filesize

          39.0MB

        • memory/4616-2-0x0000000002F80000-0x0000000002FA7000-memory.dmp

          Filesize

          156KB

        • memory/4616-62-0x0000000000400000-0x0000000002B06000-memory.dmp

          Filesize

          39.0MB

        • memory/4616-76-0x0000000000400000-0x0000000002B06000-memory.dmp

          Filesize

          39.0MB

        • memory/4616-81-0x0000000000400000-0x0000000002B06000-memory.dmp

          Filesize

          39.0MB

        • memory/4616-84-0x0000000000400000-0x000000000063B000-memory.dmp

          Filesize

          2.2MB

        • memory/4616-83-0x0000000000400000-0x0000000002B06000-memory.dmp

          Filesize

          39.0MB