MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1105 Ingress Tool Transfer
The sample is identified as a password-encrypted Office document, a common carrier for malicious macros. Heuristics indicate it's an exploit carrier and ClamAV specifically detects it as 'Doc.Downloader.Formbook', suggesting a downloader functionality. The encryption and structure point towards an attempt to evade static analysis, likely to deliver a secondary payload.
Heuristics 5
-
Encrypted Office package with CFB FAT corruption critical OLE_ENCRYPTED_AND_MALFORMEDEncrypted-package shape co-occurs with FAT-chain corruption — the documented combined evasion form.
-
ClamAV: Doc.Downloader.Formbook-bc97c1e0c33c3c93-9951465-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Downloader.Formbook-bc97c1e0c33c3c93-9951465-0
-
Default-encrypted OOXML exploit carrier layout high OOXML_ENCRYPTED_EXPLOIT_CARRIER_SHAPEDefault-password encrypted OOXML package contains embedded OLE object parts and additional activation/decoy parts. This layout is common in malicious Excel exploit delivery and requires inspecting the decrypted package.
-
Office document is password-encrypted medium OFFICE_ENCRYPTED_PACKAGEOLE container holds MS-OFFCRYPTO encrypted package (Standard Encryption (Office 2007, AES)).
-
Office OOXML encrypted with default VelvetSweatshop password medium OFFICE_DEFAULT_PASSWORD_ENCRYPTED_OOXMLOLE EncryptedPackage decrypts with Excel's built-in VelvetSweatshop password. Office opens this transparently, and malware uses it to hide OOXML exploit parts from scanners that only inspect the outer OLE container.
Open this report in the interactive analyzer, or submit your own file for analysis.