Xls.Dropper.EPPlus-9802867-2 Office (OOXML) / .XLSM malware analysis — malicious · d8712571f7811716

MALICIOUS

Office (OOXML) / .XLSM

77.8 KB

MD5: b1a28d283cba29a8de109075449267dc SHA-1: 7ea1678df9a762a07c2d7e3a17d0cd7f6c2bc9b4 SHA-256: d8712571f7811716477db263581b8802029d765292c64faffd4e59b61658689b

260 Risk Score

Malware Insights

Xls.Dropper.EPPlus-9802867-2 · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is an XLSM document containing a Workbook_Open macro, which is a common technique for executing malicious code upon opening. ClamAV signatures identify it as Xls.Dropper.EPPlus-9802867-2, indicating its function as a dropper. The macro likely downloads and executes a second-stage payload, as suggested by the dropper classification and the presence of embedded VBA macros.

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` `e163e1d56ce9088e81b4ec539219a07010e838325789d962b81f642d29ee0aaa`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	4951 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` `725e22ef4baeecebef31291015180c9e55f05c364334b5ff6ca41d02b51aa056`	vba-project	OOXML VBA project: xl/vbaProject.bin	6144 bytes
Detection ClamAV: Xls.Dropper.EPPlus-9802867-2 Obfuscation or payload: unlikely

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