Office (OOXML) / .XLSX malware analysis — malicious · 9698437ebee17348

MALICIOUS

Office (OOXML) / .XLSX

59.6 KB Created: 2020-05-21 07:15:11 UTC Authoring application: 16.0300

MD5: 4f11d0e0894c4d1ca9bc26cedd4547a5 SHA-1: 1c8c75936f9def42e34d7d28f208696d0d40ef0b SHA-256: 9698437ebee173480497cf5c1a1f3d60a6a6eb0ed51eeac1b90929e149bce2d0

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1218 Signed Binary Proxy Execution

The OOXML file contains VBA macros that utilize WScript.Shell and CreateObject functions. These are commonly used to execute arbitrary commands, such as downloading and running additional malicious payloads. The presence of these functions strongly suggests a macro-based malware delivery mechanism. No specific family could be identified from the available heuristics.

Heuristics 5

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `3e98f3902d5b22e92b16cc8539f60ea11f4aecc48f322c4b3d55959378b2e969`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	1279 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`vbaProject_00.bin` `3df871db44c854ab1a48f361673354b5c351fcdcda6fdee92f45eb991262de99`	vba-project	OOXML VBA project: xl/vbaProject.bin	16896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`emf_00.emf` `765f240ce2883423fddbb691ab59a3309b07aa9bfc9b6208f8852fd44fca952f`	ooxml-emf	OOXML EMF part: xl/media/image1.emf	2784 bytes
`emf_01.emf` `1ba28807701f1477cac770c3cc12a7164ebb0db67f3a65a37e43271a037a86bd`	ooxml-emf	OOXML EMF part: xl/media/image2.emf	1408 bytes

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