RTF malware analysis — malicious · 167aafdfaa04977a

MALICIOUS

RTF

505.6 KB Created: 2020-06-11 15:56:00

MD5: fdda4b2493c1e188e1f10db3c2cef067 SHA-1: 49f9177dd16bdb916b8c01b6ad4cdc5030c526f2 SHA-256: 167aafdfaa04977ae83d81a19cae24822b667e0e881ddc19f264c2bfb3e5b09c

142 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains multiple embedded OLE objects, with one specifically triggering the ".objupdate" directive. This directive is known to activate embedded objects, leading to the exploitation of CVE-2017-8759. This vulnerability allows for arbitrary code execution, indicating a malicious intent to compromise the user's system.

Heuristics 5

CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759

RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 8 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
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.microsoft.com/office/word/2003/wordml

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00002b2d.bin` `ba6920a525614d65307a14feb4f04ba7ceab662d029af7441e4fe2dec4bec1bc`	rtf-objdata-decoded	RTF \objdata at offset 0x2B2D	20539 bytes
`objdata_01_off000112ef.bin` `99edfaa7af0f6829151758a909020464d564c45aaec95ebcdc9d7c81916bd02b`	rtf-objdata-decoded	RTF \objdata at offset 0x112EF	20539 bytes
`objdata_02_off0001fbb8.bin` `b7fbba9d0bf026f681221968cb8d0590fdb77a2695e627e1ecec9b0feb69b1fc`	rtf-objdata-decoded	RTF \objdata at offset 0x1FBB8	20539 bytes
`objdata_03_off0002e481.bin` `07a7bef46db553188088bdc0efb4a8f2fd443dbb0174a5f7993396496238f2b3`	rtf-objdata-decoded	RTF \objdata at offset 0x2E481	20539 bytes
`objdata_04_off0003cd4a.bin` `502b1bda774f3fbb3b551fdd71f9b15a10b0546e8af933bb59412aa573654fad`	rtf-objdata-decoded	RTF \objdata at offset 0x3CD4A	20539 bytes
`objdata_05_off0004b613.bin` `6592e0d91c3f9741c9cb7f60c8bf5c837379f4a9c9ff8eb948366eb38fbc06f2`	rtf-objdata-decoded	RTF \objdata at offset 0x4B613	20539 bytes
`objdata_06_off00059edc.bin` `3e42e7ddeb20582dcdd41eacb808eedc09a59cb050317804143d492679bd99d5`	rtf-objdata-decoded	RTF \objdata at offset 0x59EDC	20539 bytes
`objdata_07_off000687a5.bin` `73124a7f85e75eda0625098497c10dba1fdabc621a74be5d6badd7597c060ec8`	rtf-objdata-decoded	RTF \objdata at offset 0x687A5	20539 bytes

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