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Update observed IOC rules - 2026-07-08 #4795

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Update observed IOC rules - 2026-07-08 #4795

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ee00e87
chore: Update IOC rule - Observed IOC: Malicious sender email addresses
github-actions[bot] Jul 3, 2026
b65d37d
chore: Update IOC rule - Observed IOC: Malicious sender email addresses
github-actions[bot] Jul 8, 2026
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5 changes: 1 addition & 4 deletions detection-rules/observed_malicious_sender_emails.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -71,7 +71,6 @@ source: |
'45df5110a927dc6160ee706784b4b3f75bc3f9154c75b3c28a524501a25943f5', // Observed malicious sender
'48f87ee437793b1d2f8faf51dd2a5748f7a67f67fc0b168e861beeb28f371b59', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'4bd612d0513e4be9d62a13fff090a163b7fe55534ee8cd6a95b4f925d558210a', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'4d3b689898ba624f2032a9e928e258b3650f0ffd5c898f49f9816e1c6e09b575', // Observed malicious sender
'4fc1f40c3dce21cdc1416a0932cdacd9b8cf20c6cd8993c3f5784bf4d6b9fc4c', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'5072d99c5b7c54ed31bdacd396a646a237dc7921822f442a2d36bc63eb3ded7b', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'5088966877d8065394ac600df092d315bbb7e8a3ba18f1bc1e46bf12118bbc35', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
Expand All @@ -80,7 +79,6 @@ source: |
'54c49afa6a2b40d9ef8cef1be579a62fd941070d5d423ed44ca02d7a75c78f99', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'54e9c00529e925b43d578e8b1cb5efa2c634992ff871b98715b10d96b49c97c3', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'5915f865d7aa335645d6eb8c6de4f2b555044da805cb699d7ef144ef7e4db0c1', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'596544745fbc6b8bab69197761c945c13799b9ac2ffac93b4a69fc9b335870d0', // Observed malicious sender
'597628907508fd4ba364bbe8113d950b95fe07511d077043c8a2b266e3cdedc7', // Throwaway/lookalike sender address used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'5a13688445cbe7a317357c3965cc5cba2db610fb18eee85c8cef43937b9d0c0f', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'5a3e0172e9f47403a5211107fa7bf4f9e4c123db10bce71a56dd24dab210472b', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
Expand Down Expand Up @@ -115,6 +113,7 @@ source: |
'766d628cd39125d9a6bce62dff3203cdc47d1a74e83f05157ad4fd28771974cd', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'77dbd254b71aedc57d3247f9273b23a0ff191ebeafd4fe231048959f0191d524', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'7d3ecab1afc389186703af31545b4b7485ff20ad130167d641a178bf88850f1f', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'7ecd366c4bc3213afe9374bf72d1e8151c1fcba1d1de800a7b9d9f58796835d1', // Observed malicious sender
'7f6a1cadfd6cbdc412e25021725006324d84aeb4ba3e366d772e92887937bf15', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'8030cd12e522cf160c85171bfaee999d095e79bd66815d4604f5e4406a1c566c', // Observed malicious sender - multiple cred phish lures
'80c2073c491f2330f6f9d87cfd0e9ca485ef3cb293c2fb8759a6edefa45ed0be', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
Expand Down Expand Up @@ -159,7 +158,6 @@ source: |
'b7281cf68223954ebe25b926a93d4073fa160430de9d90546bde6c34ff1418c5', // Throwaway/lookalike sender address used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'bb24567ae519d6391aba7c28597fbf84a1c9b283bcd9e8d9383e4345c7ee0dcf', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'c36ab707c4867b70407bfc0d9a4b069350080fdc820626f9a54f88ca905a3c97', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'c49bb65f4606f67fc7e9f5f71e5511f55551c1d052cf1762f46a5472ae085029', // Observed malicious sender (sextortion/scam campaigns)
'c58703f9493a1ba83cfce49fc8afb2fbfc7442ea87abdeb74727a6b21e81d5ec', // Throwaway/lookalike sender address used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'c7c688e8204b906d36f4ce1f8bab9238a5eed71d0e5021ac9966c63df027c2bc', // Throwaway/lookalike sender address used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'ca2e7c13010d96bf2286342dc7ea87ec67232e29b5e659820210e01cef273081', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
Expand All @@ -181,7 +179,6 @@ source: |
'e2dd8628371377d56c761817ed6676c5ccd2e9870f1b8cb7b63467f0d387d8fd', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'e7c699fb15764decb4193d06537fd56d2ebb7e6af19919dd9b489815c200ea2c', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'e8a9768b0450f6383b427808fa6855e617e0f2210cfad339879a25f194aca25d', // Throwaway/lookalike sender address used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'eaa6ae148c389d5ffc77ca5437cc24e1ecca7052be3313c1e752de67d161f7c2', // Observed malicious sender
'eb1e5843a298cfb84f6b443ee59e3e5385a9d047dccb2e2d568e71b8688d74a5', // Observed malicious sender
'eb6fdf648b34efa0d7eed5ac971d12d2fbc5d8f8fa3c5d3abe7d307b3f1367f2', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
'ed227a85dd447f006e6c34ffe955bfbfd864b88e0ef91ddfc1c7f5546bdf6f90', // Free-mail persona used in VIP-impersonation invoice/payment BEC with fabricated reply threads
Expand Down