Office (OLE) / .XLS malware analysis — malicious · 68dd9b03a21b4d95

MALICIOUS

Office (OLE) / .XLS

71.0 KB Created: 2022-11-29 07:16:03 First seen: 2022-12-02

MD5: 4d54017e706cd35149ee914b9add4e45 SHA-1: db510cee46d1f914e653fd1b0e4c9f91a7b4435d SHA-256: 68dd9b03a21b4d95f214523e93d24abb6216f3eceab2a0bdcf54aad83f2e1b79

188 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The file contains VBA macros that utilize the `Shell()` function and `CreateObject("MSXML2.XMLHTTP")` to download content from a URL. The ClamAV detection name 'Xls.Downloader.b83ac4c497e169b5-9980307-0' further indicates its downloader capabilities. The script appears to be designed to fetch and execute a secondary payload, which is a common technique for malware distribution.

Heuristics 5

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Xls.Downloader.b83ac4c497e169b5-9980307-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.b83ac4c497e169b5-9980307-0
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7aa807d266e0fbfc057565ac72ebadfaaae7c974f83a8f70f0e053cfba7655ac`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5075 bytes

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