MALICIOUS
320
Risk Score
Malware Insights
The critical heuristic CVE_2017_11882_EQUATION_NATIVE_CMD indicates the exploitation of CVE-2017-11882 through an embedded Equation Editor object. This exploit is designed to execute a command-line stager, as evidenced by the extracted command: 'cmd /c ren %tmp%\mm v&cSCRIpT %tmp%\v?..wsf ..C.......................................................'. The presence of an Auto_Open macro further suggests automatic execution upon opening the document, typical of malicious macro-enabled files.
Heuristics 8
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CVE-2017-11882 — Equation Editor command stager critical CVE likely CVE_2017_11882_EQUATION_NATIVE_CMDEmbedded Equation Editor OLE data contains an invalid Equation Native/MTEF stream with an embedded command stager. This is likely CVE-2017-11882 exploitation because the vulnerable Equation Editor component is reached and the malformed native stream directly carries process-launch bytes.
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Equation Editor OLE object high OLE_EQUATION_EDITOREmbedded OLE object xl/embeddings/oleObject3.bin contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
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ClamAV: Xls.Malware.Generic-8176608-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Xls.Malware.Generic-8176608-0
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Auto_Open macro high OLE_VBA_AUTOAuto_Open macro
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CreateObject call high OLE_VBA_CREATEOBJCreateObject call
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Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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VBA project inside OOXML medium OOXML_VBADocument contains vbaProject.bin — VBA macros present
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Embedded OLE object medium OOXML_OLE_OBJECTDocument contains an embedded OLE object
Extracted artifacts 9
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.basab96d671b0f6645a0444fe98a6473465e0019a1f973753a33ee7dc074d6d8ae6 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source from OOXML) | 25040 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.
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ooxml_oleobject_00.binaa7d5320383731b056c17aa344da4afaffb0d16dddc7496ef9550677e07c9b7d |
ooxml-ole-object | OOXML embedded OLE part: xl/embeddings/oleObject1.bin | 3584 bytes |
ooxml_oleobject_00_ole10native_00.bin6530464814e5b1dce7c9fbfa3ac504ae72e8b8751b72a64be45fe1a5bd78ed57 |
ole-package | OOXML xl/embeddings/oleObject1.bin Ole10Native stream: Ole10Native | 1240 bytes |
ooxml_oleobject_01.binaadbe44b59406c4ba0d2243d9450742341a20b5ace7dc7b2cc725110f76385cf |
ooxml-ole-object | OOXML embedded OLE part: xl/embeddings/oleObject2.bin | 12800 bytes |
ooxml_oleobject_01_ole10native_00.bin69d8be1e7d6a56ccf79e374d5b327811b05b9221171a531d600fc36b7d4b41d8 |
ole-package | OOXML xl/embeddings/oleObject2.bin Ole10Native stream: Ole10Native | 9802 bytes |
ooxml_oleobject_02.bin464959801baf4a495a984dfab3d2962d78f7134048272e31cd1697e25d88b8b7 |
ooxml-ole-object | OOXML embedded OLE part: xl/embeddings/oleObject3.bin | 5936 bytes |
ooxml_oleobject_03.bin9d2cb46137213aa2602514eebc2dc0c4776b04923f2a58dd74d6560a3179e628 |
ooxml-ole-object | OOXML embedded OLE part: xl/vbaProject.bin | 44032 bytes |
emf_00.emf979dde2aed02f077c16ae53546c6df9eed40e8386d6db6fc36aee9f966d2cb82 |
ooxml-emf | OOXML EMF part: xl/media/image1.emf | 4968 bytes |
emf_01.emf4d4d1e7b04c99dcb8e885915068ad6f74cc2333e91580cdae5ccaa00c427247f |
ooxml-emf | OOXML EMF part: xl/media/image2.emf | 1536 bytes |
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