AgentTesla Office (OLE) / .XLS malware analysis — malicious · 51d7e9d83ee47fde

MALICIOUS

Office (OLE) / .XLS

128.0 KB Created: 2022-11-22 09:33:48 Authoring application: Microsoft Excel First seen: 2022-11-25

MD5: cadc7a1ce95a518b28bc427259034546 SHA-1: 5f362f13ceb06e1b8e088bbaa5fba367a6bff837 SHA-256: 51d7e9d83ee47fde362716e9c50252dff4ea3891a2cf89e4be84d1551d104688

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 OLE_VBA_SHELL heuristic indicates the presence of a Shell() call within the VBA macros. The Auto_Open macro is present, which is a common execution trigger. The VBA script decodes a command string that uses PowerShell to download a file named 'Word51990.exe' from 'https://www.voievodulgelugle.ro/owncloud/index.php/s/sX8sarN7G0Cmusz/download' 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` `9ac40350c0c037610b6ade3779e7369e29fb875ab6f04b960bae77ad8dfa8cf9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1499 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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