Office (OLE) / .XLS malware analysis — malicious · 54ce645ebb022b9c

MALICIOUS

Office (OLE) / .XLS

209.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-05-15

MD5: 581913c7309c3cc6fe590f43bad23eb0 SHA-1: d5644c80e42e76b330c963faf307224179e709e4 SHA-256: 54ce645ebb022b9c867d5940d8cfa4bd63c7f53b672e4e052daaf782ff8c0b70

148 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.005 Visual Basic

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in the Microsoft Equation Editor. This vulnerability is typically leveraged to execute arbitrary code. While no VBA code was found to be executable, the presence of the Equation Editor OLE object and the specific CVE firing strongly suggest this exploit is the primary attack vector. The sample likely attempts to download and execute a second-stage payload.

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 ECX) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP ECX)
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` `9c471ecdd2bd3b88c0014286bf0be55541174a884cd258f7c121d6f13dc491af`	ole-package	OLE Ole10Native stream: MBD014FD590/ole10nAtiVe	1384 bytes

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