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

Static analysis result for SHA-256 7c84b7b9465aa385…

MALICIOUS

Office (OLE) / .XLS

813.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-29
MD5: 2942e6fa924f31a02d3957ce82a0e40b SHA-1: 56b7b9d0504c5497da73986acf9da0f11cb30cb9 SHA-256: 7c84b7b9465aa385f11fe283edfcc829d7a65134210874b077ee29a6e51eb3c3
108 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.001 Malicious Link

The critical heuristic firing for CVE-2017-11882 indicates the file exploits a vulnerability in the Equation Editor OLE object. The VBA macros are present but appear to contain no executable statements, suggesting the exploit payload is directly embedded within the OLE object. The file's purpose is to leverage this exploit to execute a secondary payload.

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.
  • 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.

FilenameKindSourceSize
macros.bas
1d3b71b8c6234aace88f31f6e674b07383e015a2e68993dcd4fc2526aa470fe5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2412 bytes
ole10native_00.bin
c1afb9df48423f261209fd47ca9ffa08b17cb65f6780f20990b4d62b45162dc1		 ole-package OLE Ole10Native stream: MBD0152E561/olE10NATiVE 1842 bytes

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