Office (OLE) / .DOC malware analysis — malicious · 5d05433b3e7d49e8

MALICIOUS

Office (OLE) / .DOC

1.91 MB First seen: 2022-10-29

MD5: c49518bb4d02b7890bdc2bbde66d6d07 SHA-1: bc18e7dc329b399726f7c96091c29e5a2a5d7d1f SHA-256: 5d05433b3e7d49e83f6f7b301998521a7614e8b09cb7d0db5d80fba18d4bf480

142 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1559.001 Component Object Model Hijacking

The critical heuristic firing CVE_2017_11882_EQUATION_OLE10NATIVE indicates the presence of a payload exploiting the Equation Editor vulnerability. The OLE_EQUATION_EDITOR heuristic further confirms the use of an Equation Editor OLE object. The extracted artifact 'ole10native_00.bin' is the likely payload delivered via this exploit.

Heuristics 4

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.
x86 GetPC stub (CALL $+5; POP EDX) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP EDX)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin` `db60119852d6a6a845fdc064c5165605411c8a54797e3867ad82f030e03ee811`	ole-package	OLE Ole10Native stream: ole10NAtive	1980788 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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