Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 393236af4344bbcd…

MALICIOUS

Office (OLE) / .DOC

135.5 KB Created: 2010-04-14 22:53:00 Authoring application: Microsoft Word 10.1
MD5: ad1b8c6d8d37118e86618b1347384e0c SHA-1: f811da2ca3548c448fbf0e35f9d468a5d8cfd463 SHA-256: 393236af4344bbcd35775faddaf2ed89acff145b26081da3e6762a198b1cc01c
500 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.003 Windows Command Shell T1204.002 Malicious File

The sample is a malicious Microsoft Word document containing VBA macros. The AutoOpen and Auto_Close macros, along with critical findings for Shell() and WScript.Shell usage, indicate that the macros are designed to execute arbitrary code. The presence of a ClamAV detection for 'Doc.Trojan.Marker-31' and 'Doc.Trojan.ColdApe-2' on an extracted artifact further confirms its malicious nature. The document body presents a fake event sponsorship agreement, likely a lure to encourage the user to enable macros.

Heuristics 11

  • 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.Marker-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-31
  • 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
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
e3f941cbf164059dc3e82da8a1f6828cc9a8a6487349d603d33233e78efb2c8e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12252 bytes
Detection
ClamAV: Doc.Trojan.ColdApe-2
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 8 Chr/ChrW string-construction calls. 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.