Xls.Downloader.b83ac4c497e169b5-9980307-0 Office (OLE) / .XLS malware analysis — malicious · 7c2686dba98a775a

MALICIOUS

Office (OLE) / .XLS

63.5 KB Created: 2022-11-10 08:03:39 First seen: 2022-11-10

MD5: 10b7bf4ac00a0dd7ce9937fb8a73ea78 SHA-1: 82fed504c0ba1fd313f4f27b0b310820b99b199c SHA-256: 7c2686dba98a775ac49adae7826a80d3edc3877f5f82d19703f479b3b5a7a0e6

188 Risk Score

Malware Insights

Xls.Downloader.b83ac4c497e169b5-9980307-0 · confidence 95%

MITRE ATT&CK

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

The sample contains VBA macros that utilize Shell() and CreateObject() functions, indicative of malicious activity. The script attempts to download a payload from the reconstructed URL 'http://1y2ou4bi60ci.com/c12o-m' and save it as 'C:\Users\Public\9c6al9c.exe', which is then likely executed. This behavior aligns with a downloader malware.

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` `121647c3595ee9c076aa6008c3d8902f97a20693821367b437b54d88a852b244`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3123 bytes

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