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

Static analysis result for SHA-256 9e61024f65f69c6e…

MALICIOUS

Office (OLE) / .DOC

842.5 KB First seen: 2022-08-02
MD5: ea9bb586ae8659a40d144c6df35cfb8f SHA-1: d049c8571f615c58e9ea36d03742c291ce6b49d0 SHA-256: 9e61024f65f69c6e8be99a493d16907129a0ef32b293500453b836d9885a757a
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded Equation Editor OLE object that is known to be vulnerable to CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is loaded. The embedded OLE object likely contains a second-stage payload, although its specific nature cannot be determined from the provided evidence.

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
11099882ec0634f1084e3f550f145d4fb7fcee3de661c6a8014b9cd5835d0904		 ole-package OLE Ole10Native stream: OLe10nATivE 853369 bytes

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