Emooodldr Office (OOXML) / .DOC malware analysis — malicious · eeabaea8e1a978fb

MALICIOUS

Office (OOXML) / .DOC

140.3 KB Created: 2021-11-15 15:39:00 UTC Authoring application: Microsoft Office Word 12.0000

MD5: 7d987aac2dba9450640fb15d860be5dc SHA-1: d1b28331e2b1c9d4ea09bdf8443dac74229ecbb1 SHA-256: eeabaea8e1a978fb94bbb03a4dd20c9259c9a65bdaee42ab5a777ca1ccba27a0

302 Risk Score

Malware Insights

Emooodldr · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Xls.Downloader.Emooodldr-10031562-0. Static analysis revealed the presence of VBA macros, including a Document_Open macro, which is a common technique for executing malicious code upon opening the document. The extracted VBA macro code appears to be designed to download and execute a second-stage payload, as indicated by the use of `CreateObject` and `GetObject` calls, and the `FileQueryRange` function which suggests interaction with external files or URLs. The presence of `macros.bas` and `vbaProject_00.bin` further supports this.

Heuristics 8

ClamAV: Xls.Downloader.Emooodldr-10031562-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Emooodldr-10031562-0
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.
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject call
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present
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://schemas.openxmlformats.org/markup-compatibility/2006
- http://schemas.openxmlformats.org/officeDocument/2006/relationships
- http://schemas.openxmlformats.org/officeDocument/2006/math
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
- http://schemas.openxmlformats.org/wordprocessingml/2006/main
- http://schemas.microsoft.com/office/word/2006/wordml

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `e53e3734f5c43adf58370feee1b5707cc66f4a1c2cd43a48deedecacf5c12b3d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	4433 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `5b60dc7a2eb1fc39571b9ba3100b6dddb2a5fd500fbaf1f0943b73323a8b726d`	vba-project	OOXML VBA project: word/vbaProject.bin	16896 bytes
Detection ClamAV: Xls.Downloader.Emooodldr-10031562-0 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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