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

Static analysis result for SHA-256 ee87371ff74c2423…

MALICIOUS

Office (OLE) / .XLS

1.18 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-16
MD5: 33a75ae52baa059c946ce63343977318 SHA-1: 3f9a8c9b845e25c823236f55e803261611b7ada1 SHA-256: ee87371ff74c24235fb99de41971f23185587ee25030fe4abf0a6142101cfb6e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This technique is commonly used to execute arbitrary code, often leading to the download and execution of further malicious payloads. No document body text was available for analysis, but the presence of the exploit is sufficient evidence of malicious intent.

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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
18d367fb2691c250888963414e1f0f0f34a85093ea78ded4022d3b67fd43d3d2		 ole-package OLE Ole10Native stream: MBD0140657A/Ole10Native 61938 bytes
ole10native_01.bin
0e74f03b42dbfb73650ae77db35efc03f254670fe5c220fbf54bacb45cb41486		 ole-package OLE Ole10Native stream: MBD0140657B/Ole10Native 50530 bytes
ole10native_04.bin
6516bc171c39a85dbb720424dee40414bce0f4289c574692dcb3c4a8880d3e8a		 ole-package OLE Ole10Native stream: MBD01406582/Ole10natIvE 1582 bytes

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