Office (OLE) / .XLS malware analysis — malicious · d9ee7df831dcea9b

MALICIOUS

Office (OLE) / .XLS

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

MD5: a07f832702695c79b22567e6414b92e7 SHA-1: bd20ec4b2151cfee73dd7a7a080b9678a64a963d SHA-256: d9ee7df831dcea9b16b62efbee3fea080d657bee5598e1e5353a734f7840f3b8

288 Risk Score

Malware Insights

MITRE ATT&CK

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

The XLS file contains VBA macros that utilize WScript.Shell and CreateObject to download a payload. The `cominciarono` function appears to construct a URL using obfuscated strings and then fetches content from it. The `Afallisce` function reads a file, and the truncated `finanziamenti` function suggests further execution or manipulation based on environment variables and file access, likely to download and execute a second-stage payload.

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

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