Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9891b52ca41c12e0…

MALICIOUS

Office (OLE)

4.49 MB Created: 2006-02-01 11:10:36 Authoring application: Advanced Installer 7.1.3
MD5: 78d844a5d7889e027f6bb8383ecd8999 SHA-1: 4c03b7cea0a95dd509cf1842225570b4ee88b355 SHA-256: 9891b52ca41c12e07f452622e9c4bd1c0fe6b2667600b4d6d07666f02e0fa11c
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature Win.Virus.Expiro-9957833-0. Static analysis revealed an embedded PE executable, 'embedded_office_00023800.exe', and references to CreateProcess and ShellExecute APIs, indicating the execution of external processes. The document body lists several files, including executables and DLLs, suggesting a setup or installer package. The presence of multiple URLs associated with 'replacemagic.com' further supports the delivery of malicious content.

Heuristics 7

  • Embedded PE executable critical OLE_EMBEDDED_EXE
    MZ/PE header found inside document — possible embedded executable
  • ClamAV: Win.Virus.Expiro-9957833-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Virus.Expiro-9957833-0
  • 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 CreateProcess API high SC_STR_CREATEPROCESS
    Reference to CreateProcess API
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Suspicious extracted artifact info 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.
  • 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://www.replacemagic.com/post.aspx[HttpPostUrl]ErrorRetryecmusReinstallModeErrorAbortAppsShutdownOption
    • http://www.replacemagic.com/RMPowerPointEdition.aspxARPURLINFOABOUTchangesCtrlEvtchanges&Next
    • http://www.replacemagic.com/contact.aspxARPCONTACTOLDPRODUCTS;AI_NEWERPRODUCTFOUNDSecureCustomProperties&ResumeButtonText_Resume&YesButtonText_YesSetup
    • http://www.replacemagic.com/forumARPHELPLINKButtonText_OKErrorDialogTypical&NoButtonText_NoexclamicExclamationIcon&ReturnButtonText_Return&FinishButtonText_Finish&RepairButtonText_RepairChangingCtrlEvtChanging&IgnoreButtonText_Ignorehttp://www.replacemagic.com/Downloads.aspxARPURLUPDATEINFORepairingCtrlEvtRepairingremovesCtrlEvtremovesPPROMPTROLLBACKCOSTButtonText_CancelEnableUserControlProductVersion3CTRLSAI_APP_FILE2ALLUSERSLogo.exeARPPRODUCTICONAxmataManufacturer&RemoveButtonText_RemoveINSTALLLEVEL(+1)-970-672-0200ARPHELPTELEPHONE{\DlgFontBold8}DlgTitleFontAI_UPGRADE
    • http://www.example.com
    • http://www.yahoo.com
    • http://www.google.com

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_office_00023800.exe
f41e5fb00fcef8272070e191a02f6511371ed31b6361205066133fe2fe50fe47		 embedded-pe Office MZ+PE at offset 0x23800 4564480 bytes
Detection
ClamAV: Win.Virus.Expiro-9957833-0
Obfuscation or payload: likely
Carved artifact entropy is 7.73, consistent with packed or encrypted content.

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