Office (OLE) / .XLS malware analysis — malicious · 4a0c8835b316466a

MALICIOUS

Office (OLE) / .XLS

69.0 KB Created: 2022-11-08 07:28:13 Authoring application: Microsoft Excel First seen: 2022-11-08

MD5: ec49f73d4711b56cfd4e852c380b0dd5 SHA-1: bb155d7dab1ddcfc3f198338691add319d085dcf SHA-256: 4a0c8835b316466a6145e560a69c120987ca6b54b8ba4a69272c102e3181d2d0

288 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains VBA macros that utilize WScript.Shell and CreateObject to download and execute a payload. The `cominciarono` function appears to be responsible for fetching content from a URL, indicated by the use of `CreateObject("Msxml2.XMLHTTP")` and `battendo.responseText`. The obfuscated strings within the `Ammistration` function likely resolve to critical components for this download and execution process. The ClamAV detection name 'Xls.Downloader' further supports this analysis.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
ClamAV: Xls.Downloader.d795e45a60a593c6-9978800-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.d795e45a60a593c6-9978800-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
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` `c1ff1a2d1054fe1a8a113d6651c29552579fbbc7bd21d2b7c911c234757d5943`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3839 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.