Office (OLE) / .XLS malware analysis — malicious · 8c0b9a4b182a840e

MALICIOUS

Office (OLE) / .XLS

1.55 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-12-06

MD5: 6082b3395c504cce2544d929326a407d SHA-1: ade67d3b4c048b60f0538c6c62c6f54d58659e74 SHA-256: 8c0b9a4b182a840e47b543ba7e9159b42d6885f20f01a08841366ed24826070e

148 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017-11882 indicates the file contains a payload designed to exploit this specific vulnerability in the Equation Editor OLE object. This exploit allows for arbitrary code execution upon opening the document. No VBA macros were found to contain executable statements, suggesting the exploit is directly embedded within the OLE object.

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 EAX) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP EAX)
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` `5f810e54392a3b455974a14cb00f5a3e4857a2da8dea9fabbf44d4465ca18ebf`	ole-package	OLE Ole10Native stream: MBD00B3DCCF/Ole10Native	1525 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.