Houghton Mifflin Harcourt Company
hmhco.com
Duplicate Entry
This victim has been identified as a duplicate of another entry in our database. However, this may not always be the case: the same organization can be targeted multiple times by the same or different ransomware groups, which may result in separate legitimate entries. Search for related entries
This victim has been identified as a duplicate of another entry in our database. However, this may not always be the case: the same organization can be targeted multiple times by the same or different ransomware groups, which may result in separate legitimate entries. Search for related entries
Description:
Your data was compromised in several of our campaigns throughout the past few months. We urge you to engage with us, it is in your best interests. This is a final warning to reach out by 12 May 2026 before we leak along with several annoying (digital) problems that'll come your way. Make the right decision, don't be the next headline. | Updated: 9 May 2026 | Warning: FINAL WARNING PAY OR LEAK
Infostealer activity detected by HudsonRock
Compromised Employees: 32
Compromised Users: 9513
Third Party Employee Credentials: 23
External Attack Surface: 114
Infostealer Distribution
DNS Records:
The following DNS records were found for the victim's domain.
WHOIS Emails
- domain.operationsweb.com
MX Records
- us-smtp-inbound-2.mimecast.com. Mimecast
- us-smtp-inbound-1.mimecast.com. Mimecast
TXT Records
- canva-site-verification=nDn0iJqSi1AhFR_cAw5isQ
- pendo-domain-verification=-c2MowabHj26bsKA847E49izAIM
- miro-verification=788279500223085801eb9b034064d4a96bdabaf3
- _zjf8wvnzc5hzfuordx7qti6vz2lo9dd
- docusign_verification=dm5d176s-eg0e-l9sg-abdi-hd56sz2tt0wc
- _reegr6qrngjjfjigyyak4y4149z96f0
- extensis-domain-verification=283f9982-b8c8-4996-8611-6c3b16ca80a8
- pexip-ms-tenant-domain-verification=f05dded6-08d7-4594-b27b-6d2f601a4919
- v=spf1 ip4:209.235.126.1 ip4:209.235.126.2 ip4:209.235.126.7 ip4:209.235.126.8 ip4:209.235.126.9 ip4:209.235.126.10 include:_netblocks.hmhco.com include:_spf.salesforce.com include:us._netblocks.mimecast.com include:6573d6.workshop-spf.net ~all
- atlassian-domain-verification=CBbj/iXZ5lGubFrU2QeWACCkSiIcanWzOa3PxRDfyjxeJsv4d/vf4xiiortak0h1
- _9y67qztkt2btxbaml8r2vjg40pzjd3c
- _88p140xxu23fri4pwb8p9kiy0t0aq89
- jamf-site-verification=ypSPyAynUFATrS5zB59L9g
- google-site-verification=9xAnKLlO-n0fb9ivg6304GUrAOYJzqF00f9NzD0YqwU
- amazonses:zvT1yYoxLfumWiB6ESAVrkUzwpwo6ClRCUxHEsYjaFY=
- atlassian-domain-verification=BNYS2ZxDgYF0MABftk2Zoz5k5a1O4ISi5g0vBS7vRKxvosDsl020tMm88EaCzkFE
- canva-site-verification=7BqVD8X2bt48CNLNCochRw
- docusign=9a0d3862-ce0a-4272-be65-e9d0ee8109b9
- cisco-ci-domain-verification=1e77c8c1819f3634ebaf3190e828520ae8b44db10725f96505c5668952e1a16a
- openai-domain-verification=dv-LvPgut8vxG5Id4c62TexDLU0
- _o890m8p0326f3zjpvgg9visthiabpps
- adobe-idp-site-verification=dcee0a2f77d8062795e70509a65d7f6913450b5485badb2058f23588f060c8b9
- globalsign-domain-verification=1111620e7587ddb0d56bfd6fcd6d4ae4
- globalsign-domain-verification=ace3534fbff0e03574dcd4f8bb8848b7
- facebook-domain-verification=j9y57ganvf1td5819xs1y7ro1oaocs
- canva-site-verification=XAvMwkZKNaFlNW4YQojH3g
- 49NBsw/Se/C6JS0bY1ERCAIm4lXSNiDJB3VJ4548dGRG3LGlCjuddY3HFB6JrGLJJns1X0QVEaK3c3mAxiDdpA==
- google-site-verification=WAHW1EO8Bhocy1PlQISnzb50g26m17-znBENRYcynKI
- globalsign-domain-verification=A5690202F4D1340FC95C7147711395FE
- apple-domain-verification=P7EQHRcSw1MEhYAw
- OSSRH-77297
- _xk90kd0yh344144zsllem3xd0tur9ye
- docusignv=52c16912-2c65-4f50-b613-fa56c465c707
- smartsheet-site-validation=Y9J8B1EtJP8RjvrCy7bJNAGuwfZwPPw0
- fe12f446-397f-4147-8aaa-a09a152e0e4f
- _9sie6t2ppawjloiuavjlv2dx3qite9b
- _yrydfmt6ek9t9k9oiffq7j710sdp5r2
- google-site-verification=jWaPYj9EqDhNlqii90MwSAGGqILGT3qvjv3sc9AjwVk
- MS=ms65451366
Cloud / SaaS Services Detected
Adobe
Apple
Atlassian
Amazon SES/WorkMail
Microsoft 365
Salesforce
OpenIA
Miro
JamF
Cisco
Mimecast
DocuSign
Legal Disclaimer: Ransomware.live does not engage in the acquisition, exfiltration, downloading, possession, hosting, access, consultation, redistribution, or disclosure of unlawfully obtained data. This platform indexes only publicly visible information posted by ransomware operators and open web sources without accessing or obtaining the underlying stolen content. The service is provided to support public awareness, legitimate research, and cyber-resilience. No stolen personal or confidential data is collected or distributed via this site.