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

Static analysis result for SHA-256 0c881093e7445fa9…

MALICIOUS

Office (OLE) / .DOC

959.5 KB First seen: 2023-08-28
MD5: 5bd7c5af6df588ee43bb48f6ca321b9a SHA-1: 1b6e667b866dde7b96ced4bd1cf12d86277aa2c0 SHA-256: 0c881093e7445fa96768dda6d18a8e7ac5dbc4cafad50d9097827935ba70edf1
100 Risk Score

Malware Insights

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

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. This is a known vulnerability often leveraged to execute arbitrary code when the document is opened. The file is a malicious OLE document, likely delivered as an attachment, aiming to exploit this vulnerability.

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
ed097a7aec530abeedbe2c2e69fefbe833b9920b063fb99e921a26db560e7a80
ole-package OLE Ole10Native stream: OLE10naTIvE 972330 bytes