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

Static analysis result for SHA-256 dc0b46a0add517f6…

MALICIOUS

Office (OLE) / .XLS

169.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-16
MD5: de538eed80d8fd3d08ca320457cc5fef SHA-1: 3880dcaebb4805aa968c118ceabc351d18ed27df SHA-256: dc0b46a0add517f632937b605ff9d0820f8fefaf1e886c1ad3d0054d50a2a53e
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Excel file containing an embedded OLE object that exploits CVE-2017-11882. This vulnerability allows for arbitrary code execution when the Equation Editor is loaded. No VBA macros were found to be executable, but the presence of the exploit object is sufficient for malicious execution. The file's SHA256 hash is provided as an IOC.

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
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
084ffb9ca5395f677173fc7c79387afbff31c9bdf070e334097d3e190cdc8e38		 ole-package OLE Ole10Native stream: MBD016BF3F0/OLE10NatIVe 1407 bytes

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