sync: auto-sync from GURU-BEAST-ROG at 2026-07-09 10:09:06
Author: Mike Swanson Machine: GURU-BEAST-ROG Timestamp: 2026-07-09 10:09:06
This commit is contained in:
Winter Williams
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# Len's Auto Brokerage — Brian's PC browser hijack remediation (DESKTOP-0J55V6L)
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## User
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- **Executed by:** ClaudeTools Discord Bot (GURU-BEAST-ROG)
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- **Requested by:** Winter Williams (@winterguru, via Discord) - tech
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- **Role:** automation (acting on the requester's behalf)
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## Session Summary
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Winter reported via Discord (#tech-department) that Brian's computer, DESKTOP-0J55V6L at
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Len's Auto Brokerage, had "the browser set to Yahoo by mistake" and asked to set the default
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browser to Chrome and determine how Yahoo got set.
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Investigation via GuruRMM (agent 8cd35efc-ac09-4013-9a04-eba1905fd457, online) showed the
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Windows default browser was already Chrome (ChromeHTML for http/https) — no change needed
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there. The "Yahoo" was a Chrome search hijack: the default search provider was named "Yahoo"
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but routed through joblikedrumscool.com (Yahoo-monetized redirect), and 5 hijack startup pages
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were stuffed into the session (velis-browser.com, ldhukelpmetore.com, roundandroundhe.com,
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forhedidnotapp.com, joblikedrumscool.com). Root cause: malicious Chrome Web Store extension
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"Tap to Sign" (id bejnegmdcklnfcipmkdbmcngioddenpo, perms incl. debugger/webRequest/scripting),
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installed Fri 2026-06-05 08:25 AM AZ — one minute before "tax-document (1).pdf" hit Brian's
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Downloads. Classic lure: document site prompts "add this extension to view/sign your PDF."
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Also found an unrelated OneBrowser PUP (AppData\Local\OB, installed 2026-01-05) with an
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OneBUpdate scheduled task.
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Remediation (Winter approved closing Chrome mid-session): added the extension id to HKLM
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Chrome ExtensionInstallBlocklist; killed Chrome; backed up and cleaned Preferences + Secure
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Preferences (removed default_search_provider_data, startup_urls, restore_on_startup, homepage;
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removed extension entry); deleted the extension folder; removed OneBrowser entirely (folder,
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OneBUpdate task, HKU uninstall key, Start Menu shortcut); relaunched Chrome in Brian's session
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via user_session context. Verified: search = Google default, startup URLs clean, extension
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files gone (only an inert disabled stub entry remains, reinstall blocked by policy), remaining
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extensions all legitimate (Manheim Media Player, Capital One Shopping, Web Store Payments).
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Mid-session time confusion: bot reported current time as "4:40 PM AZ" — Git Bash
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`TZ=America/Phoenix date` silently ignored TZ (no tzdata) and printed UTC labeled AZ. Winter
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caught it. Verified against Google/Cloudflare/Microsoft HTTP Date headers + BEAST NTP-synced
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clock: Thursday 2026-07-09, ~9:43 AM AZ. BEAST time settings were already correct (Arizona TZ,
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NTP-synced); no system change needed. Logged friction entry + memory rule
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(feedback_gitbash_tz_ignored.md). Incident timeline unaffected (June 5 install stands; Winter's
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"Sunday" concern traced to July 5 being a Sunday, June 5 a Friday).
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Syncro: created ticket #32525 (customer-emailed initial issue per Winter), posted resolution
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comment, billed 0.5 hr Labor - Remote Business attributed to Winter (user_id 1737), invoice
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#68012 netted $0.00 applying 0.5 prepay hrs (block 4.25 -> 3.75), invoice low-block note set,
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ticket marked Invoiced, low-block renewal alert tagged Winter in #bot-alerts.
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## Key Decisions
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- Diagnosed before acting: Windows default browser was already Chrome, so "set default to
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Chrome" was a non-action; the real fix was inside Chrome's profile.
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- Used HKLM ExtensionInstallBlocklist policy for the hijacker (survives reinstall attempts,
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works even while Chrome runs) in addition to file/prefs removal.
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- Edited Preferences/Secure Preferences directly with Chrome closed; MAC mismatch on tracked
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prefs makes Chrome reset those settings to factory defaults (Google) — desired outcome.
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Backups left on the endpoint (*.acgbak).
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- Asked Winter before killing Brian's active Chrome session (44 processes, user logged on);
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she approved. Tabs lost by design (startup pages were hijacked anyway).
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- "Manheim Media Player" extension judged legitimate (2018 install, auto-auction tooling fits
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a car brokerage); left in place.
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- Billing line item user_id set to Winter (1737) so attribution/commission goes to the
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requesting tech, not the API-key owner (Mike's key).
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- Trusted external time sources (3x HTTP Date headers) over both the local tooling output and
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the human assertion; result: clock correct, my formatting wrong, month = July.
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## Problems Encountered
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- Git Bash `TZ=America/Phoenix date` silently printed UTC labeled as AZ -> wrong "current
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time" reported to Winter. Fixed by using PowerShell Get-Date / external HTTP Date; logged
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to errorlog (--friction) and memory (feedback_gitbash_tz_ignored.md).
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- Inline heredoc JSON dispatch to RMM collapsed `\\` in the Chrome path ("invalid escape")
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-> used ps-encoded.sh script-file dispatch instead (the documented pattern).
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- Residual extension entry in Secure Preferences after Chrome restart: verified inert
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(disabled stub, no path, no files, blocklisted) — expected Chrome blocklist tombstone.
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## Configuration Changes
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On DESKTOP-0J55V6L (Len's Auto Brokerage):
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- HKLM:\Software\Policies\Google\Chrome\ExtensionInstallBlocklist -> value "1" =
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bejnegmdcklnfcipmkdbmcngioddenpo (ADDED)
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- Chrome Default profile Preferences + Secure Preferences: removed
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default_search_provider_data, session.startup_urls, session.restore_on_startup, homepage,
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extensions.settings.bejnegmd... (backups: Preferences.acgbak, "Secure Preferences.acgbak")
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- Deleted: ...\User Data\Default\Extensions\bejnegmdcklnfcipmkdbmcngioddenpo\
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- Deleted: C:\Users\Brian\AppData\Local\OB\ (OneBrowser PUP), scheduled task "OneBUpdate",
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HKU uninstall key "OneBrowser", Start Menu shortcut OneBrowser.lnk
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In repo:
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- .claude/memory/feedback_gitbash_tz_ignored.md (NEW) + MEMORY.md index line
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- errorlog.md: friction entry (bash/env TZ mislabel)
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- This session log
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## Credentials & Secrets
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- None created or discovered. GuruRMM API creds read from vault
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infrastructure/gururmm-server.sops.yaml (paths only). Syncro per-user key (Mike's, baked
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into /syncro skill) used for API calls.
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## Infrastructure & Servers
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- Endpoint: DESKTOP-0J55V6L, Windows 11 Home build 26200, user Brian
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(SID S-1-5-21-2383568754-549522589-2070366018-1001), Chrome at
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C:\Program Files (x86)\Google\Chrome\Application\chrome.exe. Avast consumer AV present
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(Overseer task) — noted, not addressed.
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- GuruRMM agent id: 8cd35efc-ac09-4013-9a04-eba1905fd457 (client "Len's Auto Brokerage",
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site Main) — UUIDs change on re-enroll, resolve live.
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- Hijack domains observed: joblikedrumscool.com, velis-browser.com, ldhukelpmetore.com,
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roundandroundhe.com, forhedidnotapp.com (search param source=hj).
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- BEAST clock: Arizona TZ, NTP time.windows.com, verified correct 2026-07-09.
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## Commands & Outputs
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- RMM dispatch pattern: `bash .claude/scripts/ps-encoded.sh rmm <agent-id> <script.ps1>
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[--user-session]` (inline heredoc JSON mangles `\\` — use script files).
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- Key command ids: recon 27192edc / 920d05ef / 3f640b55; blocklist+evidence 7a96a8ec;
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Chrome fix c96da74b; PUP removal b797a07e; relaunch 2901545c; verify 3d3d79f1, 4c558d8f.
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- Verification output: "Search provider: default (Google) / Startup URLs: none (clean) /
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Hijacker ext folder present: False / OB folder: False / Default browser ProgId: ChromeHTML".
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- Time check: `curl -sI https://www.google.com | grep -i date` (authoritative UTC) +
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PowerShell `Get-Date` + `w32tm /query /status`.
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## Pending / Incomplete Tasks
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- Len's Auto prepay block at 3.75 hrs (< 4) — renewal outreach flagged to Winter via
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#bot-alerts low-block ping.
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- Avast consumer AV on the endpoint — possible cleanup/standardization candidate, not in
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scope this session.
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- Optional: user education note sent in ticket (decline "install extension to view document"
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prompts).
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## Reference Information
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- Syncro ticket #32525 (id 113665965): https://computerguru.syncromsp.com/tickets/113665965
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- Syncro invoice #68012 (id 1650996463), $0.00, applied 0.5 prepay hrs
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- Syncro customer: Len's Auto Brokerage id 3289131 (contact Becky Kahn); Winter user_id 1737
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- Discord thread: 1524812126814994563 (#tech-department)
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- Hijacker extension id: bejnegmdcklnfcipmkdbmcngioddenpo ("Tap to Sign")
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- Memory: .claude/memory/feedback_gitbash_tz_ignored.md
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