Office (OLE) / .DOC malware analysis — malicious · 5956b7aac0098b4b

MALICIOUS

Office (OLE) / .DOC

71.0 KB Created: 2010-09-14 19:31:00 Authoring application: Microsoft Office Word

MD5: 407c8b9fe4cd67bca92cb2bc8c1e5148 SHA-1: bebef145d61bdc9c5bce0bef0315f6c7aaa89734 SHA-256: 5956b7aac0098b4b9b9354a4f343585944acdb35089137c6809b4e8386c3f1b0

320 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a Microsoft Word document with a high-confidence detection for VBA macros. Specifically, the 'Document_Open' macro is present and utilizes the 'Shell()' function, indicating an attempt to execute arbitrary code. ClamAV detections for 'Win.Trojan.Cookiem-1' and 'Win.Trojan.Cookiem-2' on the primary file and an extracted artifact further support malicious intent. The presence of the 'cookiemonster' string within the VBA code suggests a potential link to a specific malware family, though it is not definitively identified.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Win.Trojan.Cookiem-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Cookiem-1
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.
Document_Open macro high OLE_VBA_DOCOPEN

Document_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.
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` `9b20005126eff099ae054417271eabf3989ab3beb3d8b3f0b9747ffa59ee2676`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	22084 bytes
Detection ClamAV: Win.Trojan.Cookiem-2 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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