Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 f778381de854deef…

MALICIOUS

Office (OLE) / .DOC

911.5 KB First seen: 2023-08-28
MD5: fd3381e7c4fc6e37c45a476b9c4465eb SHA-1: 65f78d6d358975a6fa3d5901ef61b29c1e838599 SHA-256: f778381de854deef0c289fe5aff168b5ddb3307b6ded42d851caa2dcf4f4c72c
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates the presence of a known exploit for the Equation Editor vulnerability. This exploit is typically delivered via a malicious OLE object embedded in Office documents, often distributed through spearphishing attachments. The embedded ole10native artifact is the payload for this exploit.

Heuristics 2

  • Equation Editor Ole10Native payload — CVE-2017-11882 critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE
    An embedded Microsoft Equation 3.0 object (CLSID 0002CE02-0000-0000-C000-000000000046) carries an Ole10Native packager stream instead of the normal Equation Native/MTEF data. This is the weaponized Equation Editor RCE delivery shape used by CVE-2017-11882 / CVE-2018-0802 maldocs. The payload (font-record overflow + shellcode) is frequently encrypted and the stream name case-scrambled to evade scanners, but an Equation object holding an Ole10Native stream has no benign use.
  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
3b2b7bea054b9a6b4f985fab489fecabfb2d3e2889bd4b03180f535f8cc1185a
ole-package OLE Ole10Native stream: oLE10NATive 923147 bytes