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

Static analysis result for SHA-256 0ec3ece82690a06e…

MALICIOUS

Office (OLE) / .XLS

402.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-09
MD5: 95155dadd6fb5c96b004f93764ec510b SHA-1: 186216b001457986d76ff2bd11790db953eaec1b SHA-256: 0ec3ece82690a06eceb3a9876d6a8e89c77d70cf217fc928b3a0d08991ec51c3
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 PowerShell

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a vulnerability in the Equation Editor component. This suggests the file is designed to execute arbitrary code upon opening, likely to download and run a secondary payload. No VBA macros were found to contain executable statements, but the presence of the Equation Editor exploit is a strong indicator 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.
  • 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
a25a2e767884185340897eb43f7d6f540ffc9528fe3612afa7c43cba2064af48		 ole-package OLE Ole10Native stream: MBD01AC53B0/oLe10NatIvE 1558 bytes

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