Office (OLE) / .DOC malware analysis — malicious · b7b8b201c0955fb5

MALICIOUS

Office (OLE) / .DOC

221.0 KB Created: 2010-09-14 19:25:00 Authoring application: Microsoft Office Word

MD5: 444622721719c961de4d445e7b9c081a SHA-1: 7e00f21e1cd05ebde1ddaeb68d820b1377b1de5f SHA-256: b7b8b201c0955fb579a558642c198c3dae5a8cdf18504d6a50f75b8db0b9591f

328 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains VBA macros, specifically a Document_Open macro that utilizes Shell() to execute code. This indicates an attempt to download and run a secondary payload, as suggested by the ClamAV detections of Win.Trojan.Kallisti-1 and Win.Trojan.wmvg-1 on the main file and an extracted artifact respectively. The presence of the Shell() call and the auto-execution of the macro are critical indicators of malicious intent.

Heuristics 8

Shell() call in VBA critical OLE_VBA_SHELL

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

ClamAV detected this file as malware: Win.Trojan.Kallisti-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
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `4b89f0db01ce097d9e23b3366ae9564bfafb978639c388fe62ced2f0cdc746f2`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	109285 bytes
Detection ClamAV: Win.Trojan.wmvg-1 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.