Office (OLE) / .EXE malware analysis — malicious · d7b404ac38bcf628

MALICIOUS

Office (OLE) / .EXE

28.5 KB Created: 2000-01-14 09:54:50 Authoring application: Microsoft Excel

MD5: dd972719be0f885e3181fd96a35c7b21 SHA-1: 7a99ce3fb229779a87f1f55d8417ca8f5763eea9 SHA-256: d7b404ac38bcf628f4728cdf1ce19eeeebe9926044cefcce6a4ffb4dae76cbbd

380 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The file is identified as malicious by ClamAV and exhibits critical heuristics for VBA macros, Shell() calls, and WScript.Shell usage. The presence of the 'macros.bas' file and the 'OLE_VBA_SHELL' and 'OLE_VBA_WSCRIPT' firings indicate that the VBA macros are designed to execute external commands or scripts, likely to download and run a secondary payload. The document body content is minimal and does not provide further clues.

Heuristics 8

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
ClamAV: Doc.Trojan.Hopper-4 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Hopper-4
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
Suspicious extracted artifact high 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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `11df26950a75df4263fa5bd4c4bf960fb1ebeaaf21de839d6b47c4d802ff27b2`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	22319 bytes
Detection ClamAV: Doc.Trojan.Hopper-4 Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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