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

Static analysis result for SHA-256 c2745c75eefa6867…

MALICIOUS

Office (OLE) / .XLS

1.03 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-10
MD5: 77393a984431fb546e97beb9d0e060b3 SHA-1: 7df5f02e8ab51b3bbe6de0713b7a84345cdc3370 SHA-256: c2745c75eefa6867cce4cc61d89d306810370e0958a550d039c5935e7012de71
150 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017-11882 indicates that the file contains a payload designed to exploit this specific vulnerability in Microsoft Equation Editor. The presence of an OLE object associated with Equation Editor further supports this finding. No VBA macros were found to be executable, and no external URLs were identified as malicious, suggesting the primary attack vector is the embedded exploit.

Heuristics 5

  • 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 EDI) high SC_GETPC_CALL
    x86 GetPC stub (CALL $+5; POP EDI)
  • 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.
  • 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
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
f81b5dc0f134bff67b32850863689811e3ff1dad6ed5cd918403c20cc4d6ab1e		 ole-package OLE Ole10Native stream: MBD0A8EF030/Ole10Native 30803 bytes
ole10native_03.bin
c62ecabe2e07b64a9e48435931d0d0f64bc35593655f21ba1d35987521ab53bb		 ole-package OLE Ole10Native stream: MBD0A8EF037/Ole10NaTIve 1515 bytes

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