Office (OLE) / .DOC malware analysis — malicious · c4c3cc4050b3cf80

MALICIOUS

Office (OLE) / .DOC

11.5 KB First seen: 2022-06-28

MD5: 2088eeb05307aa3d742b33bcce97c489 SHA-1: 54394240c257855e4abebb576c6381e5e59a07ff SHA-256: c4c3cc4050b3cf808ec23c88ea7d961e128fd5f03306dfe66f17fb98114db2b5

222 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample contains a VBA macro with an Auto_Open subroutine that calls the Shell function. This function is used to execute a command, likely to download and run a second-stage payload from the embedded URL. The macro's intent is to execute the content of the 'll.ControlTipText' property, which is reconstructed to be 'https://bitbucket.org/!api/2.0/snippets/12sds/zEqKM5/5770a3ed7c1a489c204a42825e21950fbd4a222c/files/snippet.txt'. The use of mshta.exe and the Auto_Open macro are strong indicators of a malicious document.

Heuristics 7

Reference to mshta.exe high SC_STR_MSHTA

Reference to mshta.exe
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.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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 https://bitbucket.org/!api/2.0/snippets/12sds/zEqKM5/5770a3ed7c1a489c204a42825e21950fbd4a222c/files/snippet.txt

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `573b5ccabe624574fac132d6122480c00d689378665a798a4002ed65d6e195bb`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	584 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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