MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 Command and Scripting Interpreter
T1071.001 Application Layer Compromise
T1566.001 Privilege Escalation
The file utilizes a standard OOXML exploit delivery technique, embedding a malicious payload within a default-encrypted Excel package. The presence of the Equation Editor CLSID, coupled with the anomalous Ole10Native stream, strongly suggests an attempt to exploit CVE-2017-11882 or similar Equation Editor vulnerabilities. The decryption process reveals a hidden payload, likely designed to download and execute additional malicious code. The high heuristic scores further confirm this exploitation attempt.
Heuristics 4
-
Equation Editor OLE object high OLE_EQUATION_EDITORDefault-encrypted OOXML embedded OLE object xl/embeddings/oleObject1.bin contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
-
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.
-
Equation Editor object carries payload-like Ole10Native stream high OLE_EQUATION_OLE10NATIVE_PAYLOAD_ANOMALYDefault-encrypted OOXML embedded OLE object declares the Equation Editor CLSID but stores a large high-entropy Ole10Native stream with malformed package sizing. This is exploit-shaped Equation/OLE payload evidence.
-
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.