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

Static analysis result for SHA-256 4c79b2fc7139ae69…

MALICIOUS

Office (OLE) / .DOC

953.0 KB First seen: 2022-06-08
MD5: 23a716374225404bbad23bc592f0065b SHA-1: 29416bec59e449f2d84153d2105b487912845f4a SHA-256: 4c79b2fc7139ae69b0279a6aa282f248c0b4ed2604bb790d8c38e246aa33ca3d
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file contains an embedded Equation Editor OLE object that is known to be used for exploiting the CVE-2017-11882 vulnerability. This vulnerability allows for arbitrary code execution when the object is processed. The presence of the 'ole10native' payload strongly indicates this exploit is intended to deliver a secondary stage payload.

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
043582e2a2736290dac00eb0c7b549d35157f9f521a3daefc2e974e414185883		 ole-package OLE Ole10Native stream: olE10NaTIVe 965824 bytes

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