Office (OLE) / .DOC malware analysis — malicious · f057b0b96e7bd1b3

MALICIOUS

Office (OLE) / .DOC

2.81 MB First seen: 2022-07-21

MD5: 46b8eca7bc63cc4581974fe2fb10d2e4 SHA-1: 9d40db3064b5a532279bfd32746e3bcdfa89d9fd SHA-256: f057b0b96e7bd1b33a10c18e7e423237a87610d48d276a02857a06a4ccbb73df

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 used to deliver malicious content. The document body is heavily truncated and unreadable, providing no further context on the lure.

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.

Filename	Kind	Source	Size
`ole10native_00.bin` `c1ca76c3aafbf1b74b9a35032276e4bb7fcf5ff2a2cfc478cff2ce8f194fcb19`	ole-package	OLE Ole10Native stream: oLe10NaTIVE	2919873 bytes

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