Office (OLE) / .XLS malware analysis — malicious · 72184e58fedede38

MALICIOUS

Office (OLE) / .XLS

511.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-14

MD5: a0e70b1716e2dffef6685a080b8e00f2 SHA-1: 92b5c1bbeffe960c3c95bc53045e10c834b15e37 SHA-256: 72184e58fedede382e083ffcb0a488800cadbf938e3511a1f741ac7d5b9aa2e6

108 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE directly indicates exploitation of this vulnerability through an embedded Equation Editor object. The presence of an OLE object further supports this. No VBA macros were found to be executable, and the document body was unreadable, suggesting the exploit is the primary mechanism for payload delivery.

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` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes
`ole10native_00.bin` `784d2fa957c61585f69867f305bf213ddb134696a03f634d445ef6d10857ebba`	ole-package	OLE Ole10Native stream: MBD015BE199/oLe10NaTiVE	1682 bytes

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