AgentTesla Office (OLE) / .XLS malware analysis — malicious · 77bc5dc028982adc

MALICIOUS

Office (OLE) / .XLS

30.5 KB Created: 2023-08-07 05:28:52 Authoring application: Microsoft Excel First seen: 2023-08-07

MD5: 72ccce79a4d5594039bd12d9b410b5ea SHA-1: cbcae1f7e313f8794841e301190f6595ef69e198 SHA-256: 77bc5dc028982adc958293c6e2bb7172c31e0a8504f87324be70db87e8319688

222 Risk Score

Malware Insights

AgentTesla · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The critical heuristic 'OLE_VBA_SHELL' and the presence of an 'Auto_Open' macro indicate that the Excel file is designed to execute malicious code upon opening. The VBA script decodes a PowerShell command that downloads a second-stage executable named 'TEST.exe' from 'https://www.upload.ee/download/15544809/60681ba465801d571a80/INQ_233001E01.exe' and then executes it. This behavior is consistent with a downloader or droppper malware.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Win.Dropper.AgentTesla-9969002-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Dropper.AgentTesla-9969002-0
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact info 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` `57a90bc806094556ad0165cc7afb3e5cf110c5dbfb7e4b95249e1fedb9f27fcf`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1489 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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