Xls.Downloader.Valyria-10008445-0 Office (OLE) / .XLS malware analysis — malicious · 896dd0f8a116edbf

MALICIOUS

Office (OLE) / .XLS

100.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-09-18

MD5: d8c96466da14e352c8a11c86a61200fa SHA-1: 738380f30ec9f2448875dd97759bf49aa292cf46 SHA-256: 896dd0f8a116edbf4f54be7fac310410467043ecbd86b2d4d66089f14bde6d01

240 Risk Score

Malware Insights

Xls.Downloader.Valyria-10008445-0 · confidence 95%

MITRE ATT&CK

T1059.005 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The Workbook_Open macro in this Excel file is designed to execute a command that downloads a second-stage executable named 'l6hv4.exe' from the URL 'https://transfer.sh/gt/qyAOUa1rJz/Btro.x' using PowerShell and curl, and then executes it. The ClamAV detection name 'Xls.Downloader.Valyria-10008445-0' further supports its role as a downloader.

Heuristics 6

ClamAV: Xls.Downloader.Valyria-10008445-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Valyria-10008445-0
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
GetObject call high OLE_VBA_GETOBJ

GetObject call
cmd.exe reference in VBA high OLE_VBA_CMD

cmd.exe reference in VBA
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `ba8b5a6c9584a8e46889ad288376be9801038868a0219e7dc72af64a433bbf15`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1302 bytes

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