Emotet Office (OOXML) / .XLSM malware analysis — malicious · ee880ebdf26a1bce

MALICIOUS

Office (OOXML) / .XLSM

44.2 KB Created: 2006-09-28 05:33:49 UTC Authoring application: Microsoft Excel 12.0000

MD5: 477fd718bb764ffe3c5afde16c6c8dd2 SHA-1: eb932e19d95f88d64270d40cdc0b92c6d1cf63be SHA-256: ee880ebdf26a1bcebe70a7ba17659199833c6107d758e26d37502bed9a225ee3

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is an XLSM document containing VBA macros, specifically a Workbook_Open macro, which is a common delivery mechanism for Emotet. The ClamAV detections explicitly identify it as an Emotet downloader. The VBA code utilizes CreateObject and GetObject, typical for macro-based malware, and the embedded script is heavily obfuscated, suggesting it's designed to download and execute a second-stage payload.

Heuristics 7

ClamAV: Xls.Downloader.EmotetExcel112100-9910690-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.EmotetExcel112100-9910690-0
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
GetObject call high OLE_VBA_GETOBJ

GetObject 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` `c89f5c16142825fa1b894beb883fa94b1d86b4c74df7e68133252f106d396025`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	4755 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `91a046aa55373815d0a37d949c6bdc85e1016f253b2ebef39e9bac7efb1c20f0`	vba-project	OOXML VBA project: xl/vbaProject.bin	22016 bytes
Detection ClamAV: Xls.Downloader.Emooodldr-10031562-0 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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