Office (OLE) / .DOC malware analysis — malicious · c44297902af1f94c

MALICIOUS

Office (OLE) / .DOC

1.62 MB First seen: 2022-07-19

MD5: 1b86b93a344e9e95db84a07fdb9aa413 SHA-1: b1abdbf53fd85ea00bfba9aa6cdf41a92ef7c746 SHA-256: c44297902af1f94c6926abdadcd09ec514971b8c7a1c02d8b8d322e70e1dc677

142 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1559.002 Component Object Model Hijacking

The sample is a malicious OLE document containing an embedded Equation Editor object. Static analysis identified a critical heuristic firing for CVE-2017-11882, indicating the exploitation of this vulnerability through the Equation Editor's Ole10Native payload. This technique is commonly used to execute arbitrary code, likely to download and run a second-stage payload.

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 EBX) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP EBX)
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` `1d625c8b2105c165974a0af01392690bdf35f6fea42b9a64ad52269824ef5a8d`	ole-package	OLE Ole10Native stream: ole10nATiVE	1685568 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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