Xls.Dropper.Agent-8915862-0 Office (OOXML) / .XLSM malware analysis — malicious · d70d7499eec43ada

MALICIOUS

Office (OOXML) / .XLSM

407.4 KB Authoring application: Microsoft Excel 16.0300

MD5: 2958c347433029ff3d06f2e3f32a735b SHA-1: b729fbe5d5642ca5987db47352b134797852d097 SHA-256: d70d7499eec43adaa9d908f4df45fbb064a53e488f765ec5a5cb99baf1285389

260 Risk Score

Malware Insights

Xls.Dropper.Agent-8915862-0 · confidence 95%

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 detections indicate it's a dropper, likely designed to download and execute a second-stage payload. The presence of a Workbook_Open macro and the ClamAV signature strongly suggest this malicious behavior.

Heuristics 6

ClamAV: Xls.Dropper.Agent-8915862-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Dropper.Agent-8915862-0
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` `7633baa83f670df19319d0351b9d7f9e8132bb1e542ef10a54b704499418b9df`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	3733 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` `fe48f5975fd0f44fd7cbefedd001f6d5df8aa5aac6f26885d91774ad8bd346e6`	vba-project	OOXML VBA project: xl/vbaProject.bin	5632 bytes
Detection ClamAV: Xls.Dropper.Agent-8915862-0 Obfuscation or payload: unlikely

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