Office (OLE) / .XLS malware analysis — malicious · 082ee7f07b8c0c38

MALICIOUS

Office (OLE) / .XLS

1.03 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-23

MD5: b75dd210781a5b70ece238a4ece0146f SHA-1: 0961906323821ae152da2240ced1575e1c7f0ccd SHA-256: 082ee7f07b8c0c38ce6773cb410e757b663d220668cb368f04ad9088f486c484

108 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: User Execution: Malicious File

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. The presence of an OLE object containing this exploit payload strongly suggests the file is designed to deliver a secondary malicious payload upon opening. No VBA macros were found to be executable, and the document body was not sufficiently extracted to determine a specific lure.

Heuristics 3

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.
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `ed8da65f0f0a4cc2a905cfcf1ae916bf05ced375ebeefae9a837c8bf84ad6699`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3618 bytes
`ole10native_00.bin` `11672c91209f05d5ce0531fb0706aae6d8c9580263974bbc4eaf5399d7cf4e85`	ole-package	OLE Ole10Native stream: MBD029571F8/OLe10nativE	1488 bytes

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