Xls.Dropper.EPPlus-9802867-2 Office (OOXML) / .XLSM malware analysis — malicious · 7933ad4edab82e52

MALICIOUS

Office (OOXML) / .XLSM

431.1 KB Created: 2021-08-19 14:03:52 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2022-06-30

MD5: a7a4f3a4aa943e3bd5e78789cec486d6 SHA-1: 6bc828610e03758ea7121983b9e281b8e8b6fb47 SHA-256: 7933ad4edab82e52f977bc9623aa7b24f63ac959efbf1cd5c8ecf73a4207b9c1

382 Risk Score

Malware Insights

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

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1059.003 Windows Command Shell

The Workbook_Open macro executes a command using cmd.exe to download a second-stage executable from http://46.249.35.196/mid/Order1040258.exe using certutil.exe, and then executes the downloaded file. This indicates a dropper functionality, consistent with the ClamAV detection name Xls.Dropper.EPPlus-9802867-2.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
LOLBin reference in VBA critical OLE_VBA_LOLBIN

LOLBin reference in VBA
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
cmd.exe reference in VBA high OLE_VBA_CMD

cmd.exe reference in VBA
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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://46.249.35.196/mid/Order1040258.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `33ee3951d7131ef68a082dfbe663dfbdc0b31c3dbcb60f1d57a5c22a3c1a65cb`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	1100 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` `1ea07a89677e5033d9aedb5ec51b348e70e5b38fb908093e1db59419115268ba`	vba-project	OOXML VBA project: xl/vbaProject.bin	5632 bytes
Detection ClamAV: Xls.Dropper.EPPlus-9802867-2 Obfuscation or payload: unlikely

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