Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 60118fdf009e44bc…

MALICIOUS

Office (OOXML) / .XLSX

787.8 KB Created: 2022-05-16 17:34:45 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2023-09-05
MD5: 62b1d5ec0e9d91af515b4141eb1d4114 SHA-1: 20180a83a000aee4f86db2686a3e597dfbefc568 SHA-256: 60118fdf009e44bc0c45b70d86efddfc2e0d390141e82f4367a7cb755c9aeed4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The critical ClamAV heuristic identifies this XLSX file as 'Xls.Downloader.Trojan-aa0b8f388d8573cd'. Static analysis revealed an embedded OLE object, specifically an Equation Editor object, which is a known technique for delivering malware. The presence of these indicators strongly suggests a downloader trojan designed to execute a malicious payload.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/aD30nfl.UsR contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • ClamAV: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
45bdd1c50d387e1080b78fb4caee6fde778c716730a5ec27d50b28a3fccd0d40		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/aD30nfl.UsR 951296 bytes
ooxml_oleobject_00_ole10native_00.bin
6e367220219c34ca8573384d826380cf97d33ce68b010f738f1afc55f89a6374		 ole-package OOXML xl/embeddings/aD30nfl.UsR Ole10Native stream: olE10nAtiVE 941436 bytes
emf_00.emf
38f17a599ac5d645df3840bbb401710ef81573a747da20abbfc1b7d9a9273b58		 ooxml-emf OOXML EMF part: xl/media/image1.emf 169096 bytes

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