Office (OOXML) / .XLSM malware analysis — malicious · c6bfdc9e5397ea46

MALICIOUS

Office (OOXML) / .XLSM

43.1 KB Created: 2020-01-28 19:47:00 UTC Authoring application: Microsoft Excel 16.0300

MD5: 97817e619ce34119c27988a157f5e4b5 SHA-1: 260817a5fdba1efd52922df13247b07a18d3547a SHA-256: c6bfdc9e5397ea46ace4d3a764dd5766378bc848a7db23cab5fd43243d0a039e

110 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The XLSM file contains VBA macros that are designed to execute a PowerShell script. The script is obfuscated using Base64 encoding and string concatenation. The script's intent is to download a file from 'https://qqfor0-paal.co.za/v/soon.pif' and execute it. It also attempts to create a batch file named 'Stndww.bat' in the user's PowerShell directory, likely for persistence or execution of the downloaded payload. The presence of a Shell() call and the macro-enable lure strongly indicate a malicious downloader.

Heuristics 5

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
VBA project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
External hyperlinks (3) low OOXML_EXTERNAL_HYPERLINKS

Document contains 3 external hyperlinks — clickable URLs are stored as external relationships. First target: http://go.microsoft.com/fwlink/?LinkId=846285
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://go.microsoft.com/fwlink/?LinkId=846285
- http://go.microsoft.com/fwlink/?LinkId=844969

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `6486201197e1a94d28e562dcd079d0f1b9c5588bea1ea41b5d266d915d9e95d3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2767 bytes
`vbaProject_00.bin` `5307d1301c84c946eb03e4128205b7a104a5affe9c735df55c4cd01fe878d2be`	vba-project	OOXML VBA project: xl/vbaProject.bin	6656 bytes

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