{"record":{"id":"ATTACK:enterprise:T1598.002","title":"Spearphishing Attachment","type":"Subtechnique","source_url":"https://attack.mitre.org/techniques/T1598/002","snapshot":"enterprise-attack-20.0.json","status":"active","rights":"Source metadata only; source notices retained; no operational prose or payloads","review_status":"machine-extracted; source-specific checks passed, editorial review pending","stix_id":"attack-pattern--8982a661-d84c-48c0-b4ec-1db29c6cf3bc","external_id":"T1598.002","domain":"enterprise","created":"2020-10-02T17:08:57.386Z","modified":"2025-10-24T17:49:04.751Z","version":"1.2","aliases":[],"tactics":["reconnaissance"],"source_references":[{"source_name":"ACSC Email Spoofing","url":"https://web.archive.org/web/20210708014107/https://www.cyber.gov.au/sites/default/files/2019-03/spoof_email_sender_policy_framework.pdf"},{"source_name":"Sophos Attachment","url":"https://nakedsecurity.sophos.com/2020/10/02/serious-security-phishing-without-links-when-phishers-bring-along-their-own-web-pages/"},{"source_name":"Huntress HTML Smuggling 2024","url":"https://www.huntress.com/blog/smugglers-gambit-uncovering-html-smuggling-adversary-in-the-middle-tradecraft"},{"source_name":"Microsoft Anti Spoofing","url":"https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/anti-spoofing-protection?view=o365-worldwide"},{"source_name":"GitHub Phishery","url":"https://github.com/ryhanson/phishery"}]},"assertions":[{"id":"enterprise:relationship--6385d0af-765c-44f9-afab-ed3852f6a22f","subject":"ATTACK:enterprise:G0035","predicate":"uses","object":"ATTACK:enterprise:T1598.002","asserted_by":"MITRE ATT&CK","source_url":"https://raw.githubusercontent.com/mitre-attack/attack-stix-data/c2494b29dd268c46a5d0ea0990553e4327cd2253/enterprise-attack/enterprise-attack-20.0.json","snapshot":"enterprise-attack-20.0.json","evidence_locator":"relationship--6385d0af-765c-44f9-afab-ed3852f6a22f","modified":"2026-07-31T20:48:28.479Z","references":[{"source_name":"US-CERT TA18-074A","url":"https://www.us-cert.gov/ncas/alerts/TA18-074A"}],"qualification":"Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.","source_occurrences":1},{"id":"enterprise:relationship--8b02e229-c01f-47d0-8f37-03871ef0a608","subject":"ATTACK:enterprise:G1033","predicate":"uses","object":"ATTACK:enterprise:T1598.002","asserted_by":"MITRE ATT&CK","source_url":"https://raw.githubusercontent.com/mitre-attack/attack-stix-data/c2494b29dd268c46a5d0ea0990553e4327cd2253/enterprise-attack/enterprise-attack-20.0.json","snapshot":"enterprise-attack-20.0.json","evidence_locator":"relationship--8b02e229-c01f-47d0-8f37-03871ef0a608","modified":"2026-07-31T20:48:42.700Z","references":[{"source_name":"CISA Star Blizzard Advisory December 2023","url":"https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-341a"},{"source_name":"Microsoft Star Blizzard August 2022","url":"https://www.microsoft.com/en-us/security/blog/2022/08/15/disrupting-seaborgiums-ongoing-phishing-operations/"},{"source_name":"StarBlizzard","url":"https://www.microsoft.com/en-us/security/blog/2023/12/07/star-blizzard-increases-sophistication-and-evasion-in-ongoing-attacks/"},{"source_name":"Google TAG COLDRIVER January 2024","url":"https://blog.google/threat-analysis-group/google-tag-coldriver-russian-phishing-malware/"}],"qualification":"Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.","source_occurrences":1},{"id":"enterprise:relationship--a28e6ec8-0519-40e7-b252-90205dfbe5d9","subject":"ATTACK:enterprise:G0121","predicate":"uses","object":"ATTACK:enterprise:T1598.002","asserted_by":"MITRE ATT&CK","source_url":"https://raw.githubusercontent.com/mitre-attack/attack-stix-data/c2494b29dd268c46a5d0ea0990553e4327cd2253/enterprise-attack/enterprise-attack-20.0.json","snapshot":"enterprise-attack-20.0.json","evidence_locator":"relationship--a28e6ec8-0519-40e7-b252-90205dfbe5d9","modified":"2026-07-31T18:47:51.939Z","references":[{"source_name":"ATT Sidewinder January 2021","url":"https://cdn-cybersecurity.att.com/docs/global-perspective-of-the-sidewinder-apt.pdf"},{"source_name":"Rewterz Sidewinder APT April 2020","url":"https://www.rewterz.com/threats/sidewinder-apt-group-campaign-analysis"},{"source_name":"Cyble Sidewinder September 2020","url":"https://cybleinc.com/2020/09/26/sidewinder-apt-targets-with-futuristic-tactics-and-techniques/"}],"qualification":"Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.","source_occurrences":1},{"id":"enterprise:relationship--a2dc6f64-0980-4668-957d-a09538074898","subject":"ATTACK:enterprise:T1598.002","predicate":"subtechnique-of","object":"ATTACK:enterprise:T1598","asserted_by":"MITRE ATT&CK","source_url":"https://raw.githubusercontent.com/mitre-attack/attack-stix-data/c2494b29dd268c46a5d0ea0990553e4327cd2253/enterprise-attack/enterprise-attack-20.0.json","snapshot":"enterprise-attack-20.0.json","evidence_locator":"relationship--a2dc6f64-0980-4668-957d-a09538074898","modified":"2026-04-29T14:23:06.147Z","references":[],"qualification":"Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.","source_occurrences":1},{"id":"enterprise:relationship--a581fb2c-604a-4417-b782-cafd76b11c37","subject":"ATTACK:enterprise:M1017","predicate":"mitigates","object":"ATTACK:enterprise:T1598.002","asserted_by":"MITRE ATT&CK","source_url":"https://raw.githubusercontent.com/mitre-attack/attack-stix-data/c2494b29dd268c46a5d0ea0990553e4327cd2253/enterprise-attack/enterprise-attack-20.0.json","snapshot":"enterprise-attack-20.0.json","evidence_locator":"relationship--a581fb2c-604a-4417-b782-cafd76b11c37","modified":"2026-04-29T14:23:06.150Z","references":[],"qualification":"Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.","source_occurrences":1},{"id":"enterprise:relationship--cfdd9ee1-119f-4071-8498-02bb568fc778","subject":"ATTACK:enterprise:G1008","predicate":"uses","object":"ATTACK:enterprise:T1598.002","asserted_by":"MITRE ATT&CK","source_url":"https://raw.githubusercontent.com/mitre-attack/attack-stix-data/c2494b29dd268c46a5d0ea0990553e4327cd2253/enterprise-attack/enterprise-attack-20.0.json","snapshot":"enterprise-attack-20.0.json","evidence_locator":"relationship--cfdd9ee1-119f-4071-8498-02bb568fc778","modified":"2026-07-31T18:47:36.962Z","references":[{"source_name":"MalwareBytes SideCopy Dec 2021","url":"https://www.malwarebytes.com/blog/news/2021/12/sidecopy-apt-connecting-lures-to-victims-payloads-to-infrastructure"}],"qualification":"Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.","source_occurrences":1},{"id":"enterprise:relationship--fe67405d-7fa3-4053-b52c-25dbd4ef3479","subject":"ATTACK:enterprise:M1054","predicate":"mitigates","object":"ATTACK:enterprise:T1598.002","asserted_by":"MITRE ATT&CK","source_url":"https://raw.githubusercontent.com/mitre-attack/attack-stix-data/c2494b29dd268c46a5d0ea0990553e4327cd2253/enterprise-attack/enterprise-attack-20.0.json","snapshot":"enterprise-attack-20.0.json","evidence_locator":"relationship--fe67405d-7fa3-4053-b52c-25dbd4ef3479","modified":"2026-04-29T14:23:06.270Z","references":[{"source_name":"ACSC Email Spoofing","url":"https://web.archive.org/web/20210708014107/https://www.cyber.gov.au/sites/default/files/2019-03/spoof_email_sender_policy_framework.pdf"},{"source_name":"Microsoft Anti Spoofing","url":"https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/anti-spoofing-protection?view=o365-worldwide"}],"qualification":"Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.","source_occurrences":1}],"source_snapshot":{"file":"enterprise-attack-20.0.json","url":"https://raw.githubusercontent.com/mitre-attack/attack-stix-data/c2494b29dd268c46a5d0ea0990553e4327cd2253/enterprise-attack/enterprise-attack-20.0.json","sha256":"81113ba98afa2928f3dcff62022539f7ce30c315c32e14422f11ff95ce534352","bytes":55271014,"checked_at":"2026-10-16T03:31:39Z"},"notices_url":"https://aol.pm/source-notices.txt","notices":"License\n-------\nThe MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use ATT&CK® for research,\ndevelopment, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce\nMITRE's copyright designation and this license in any such copy.\n\n\"© 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.\"\n\nDisclaimers\n-----------\nMITRE does not claim ATT&CK enumerates all possibilities for the types of actions and behaviors documented as part\nof its adversary model and framework of techniques. Using the information contained within ATT&CK to address or cover\nfull categories of techniques will not guarantee full defensive coverage as there may be undisclosed techniques or\nvariations on existing techniques not documented by ATT&CK.\n\nALL DOCUMENTS AND THE INFORMATION CONTAINED THEREIN ARE PROVIDED ON AN \"AS IS\" BASIS AND THE CONTRIBUTOR, THE\nORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE MITRE CORPORATION, ITS BOARD OF TRUSTEES, OFFICERS,\nAGENTS, AND EMPLOYEES, DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT\nTHE USE OF THE INFORMATION THEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR\nFITNESS FOR A PARTICULAR PURPOSE.\n"}