Office (OLE) / .XLS malware analysis — malicious · 0d1271f0b67aff22

MALICIOUS

Office (OLE) / .XLS

304.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-04

MD5: a6eda9238b03ec7720d72feb0f5a16f8 SHA-1: ce10195a78eb9546d54f25940e393f04400b3f5d SHA-256: 0d1271f0b67aff228b6a7413bd627fd8af5aeb29f0ebec2e3d69e3f50f51ecd9

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1559.001 Component Object Model

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 a payload further supports this. The exact nature of the payload is not detailed, but the exploit itself is the primary attack vector.

Heuristics 2

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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin` `cd61339ed5fbfc16cb74f0afe7f67ab8978a4bb8e237584b0671f4f1c8569dcd`	ole-package	OLE Ole10Native stream: MBD004175C5/oLe10nAtIve	1433 bytes

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