Office (OLE) / .DOC malware analysis — malicious · 093cc6560ff01ac5

MALICIOUS

Office (OLE) / .DOC

1.57 MB First seen: 2022-07-08

MD5: 0243b5a9a40426e4ca2125f1410df6d1 SHA-1: 2a027e75fd3c9da42ea99e48baa83e01526094c1 SHA-256: 093cc6560ff01ac55ee7dcf1a797cb519fda23375903faa65829b5b76620b387

182 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is a malicious OLE document containing an embedded Equation Editor object. This object exploits CVE-2017-11882 to execute a payload, as indicated by the 'CVE_2017_11882_EQUATION_OLE10NATIVE' heuristic. The document also contains heuristics suggesting it is a lure for a password-protected archive, likely to bypass gateway scanning.

Heuristics 5

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 EBP) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP EBP)
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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` `618998b37455cdef3353616bd1517abb4cce83ee31c2f54061c52560bf744e96`	ole-package	OLE Ole10Native stream: ole10NaTIve	1632428 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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