Office (OOXML) / .XLSM malware analysis — malicious · e8002827a287f26c

MALICIOUS

Office (OOXML) / .XLSM

399.0 KB

MD5: ddf603552dbe717ce43958fe1015cb3a SHA-1: 7e7a4b61e5939369ee33b1d3ddfae1970c6d8d26 SHA-256: e8002827a287f26cf1c8447e12a207360bf93079b40a5304da9dfa00c2809875

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.002 Spearphishing Attachment

The file is an XLSM document containing VBA macros, specifically a Workbook_Open macro, which is a common technique for initial execution. ClamAV signatures indicate it is a dropper, likely designed to download and execute a second-stage payload. The presence of a Workbook_Open macro and the ClamAV detection strongly suggest malicious intent.

Heuristics 6

ClamAV: Xls.Dropper.EPPlus-9802867-2 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Dropper.EPPlus-9802867-2
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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` `cc6404c0b177040cf49579cd523f89aa8f047fd25df1738047b7490dc971144e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	4449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `67f87c9f67344c3b605b523dd51c91094ca85d364580fe7df0e2a6f2bc0bf76d`	vba-project	OOXML VBA project: xl/vbaProject.bin	6656 bytes
Detection ClamAV: Xls.Dropper.EPPlus-9802867-2 Obfuscation or payload: unlikely

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