Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 1fcd45e99c12157e…

MALICIOUS

Office (OLE) / .XLS

340.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-03-23
MD5: 1e2153a42b25167d0f621da0251c78a7 SHA-1: bbabdac55b1da4aff3690056b961f2d0c66b3bf9 SHA-256: 1fcd45e99c12157e5b4b9df0a64a51a591eedfe96eb0575d88eb10af23603650
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE directly indicates exploitation of this vulnerability. The presence of an Equation Editor OLE object further supports this finding. The embedded artifact is likely the payload delivered via this exploit.

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.

FilenameKindSourceSize
ole10native_00.bin
015857d41ef9af9797a280aa14e41a1f363563d0db4415b4ebad602b4d3f2cc9		 ole-package OLE Ole10Native stream: MBD003D5506/ole10naTive 2120 bytes

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