Office (OOXML) / .XLSM malware analysis — malicious · 354d9e5a555c666f

MALICIOUS

Office (OOXML) / .XLSM

87.8 KB Created: 2020-11-08 22:51:53 UTC Authoring application: Microsoft Excel 16.0300

MD5: c2c22abff1146730592a1af26bb5ee2b SHA-1: 1558a7827b5fcdd5e540bdbfc8a1f5fa5e5ac226 SHA-256: 354d9e5a555c666f33eb9e36d523e1e7d0ec4fe082a3dab8ba6bae062e46807c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is an XLSM document containing VBA macros. The Workbook_Open macro is present and triggers a Shell() call, indicating an attempt to execute arbitrary code. This is a common delivery mechanism for malware, likely intended to download and run a second-stage payload.

Heuristics 4

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
Suspicious extracted artifact high 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.
VBA project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `65751831318298e41363736f35dfafb9776c11cf90650c12b44a5bde25947731`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2008 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `890be51abccb835762849e15e28ecd6decaa1257ae0a35db317a4c1128e24545`	vba-project	OOXML VBA project: xl/vbaProject.bin	14336 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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