Qbot Office (OLE) / .XLS malware analysis — malicious · ef0156fd34e13684

MALICIOUS

Office (OLE) / .XLS

582.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: f4430ea9352d2be7c1ccb04dd69be6b8 SHA-1: 59c92accfc9adaf536d7e571ca40374132627baf SHA-256: ef0156fd34e136841f28df011c2ecddf58ee4dcf839d25692b52e086beb98d38

140 Risk Score

Malware Insights

Qbot · confidence 95%

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.005 Visual Basic T1105 Ingress Tool Transfer

The file is an Excel spreadsheet with a high-confidence detection for VBA macros, specifically an Auto_Open macro. The ClamAV detection explicitly names it as 'Xls.Downloader.Qbot-b760f03263b7c21b-9950248-0', indicating a Qbot downloader. The VBA macro code, though truncated, suggests it is designed to execute malicious actions upon opening, likely downloading and running a second-stage payload. The SHA256 hash is included as a primary IOC.

Heuristics 4

ClamAV: Xls.Downloader.Qbot-b760f03263b7c21b-9950248-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Qbot-b760f03263b7c21b-9950248-0
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `44ce8de16df26234abe008370d6052886255e8593ab511fcea07f165f11d76f7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6348 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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