Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · d81353a56983de86

MALICIOUS

RTF

719.0 KB Created: 2018-07-31 13:46:00 First seen: 2018-08-14

MD5: 94f0cdeb4d91a12c837505318c865339 SHA-1: dc1248009dd50738433ac75e920063641a062712 SHA-256: d81353a56983de86e52153f31a4cff3f62603bd082e1b454f7453d47f103d4fa

242 Risk Score

Malware Insights

Xls.Malware.Sload-7135989-0 · confidence 95%

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains multiple OLE objects, with heuristics indicating ".objupdate" forces OLE activation and the presence of Composite Monikers. ClamAV signatures identify the embedded content as Xls.Malware.Sload-7135989-0, suggesting an exploit targeting spreadsheet functionality. The primary attack vector is likely spearphishing, with the embedded OLE object serving as the malicious payload.

Heuristics 6

Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
ClamAV: Xls.Malware.Sload-7135989-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Sload-7135989-0
\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 10 \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 In RTF body

Extracted artifacts 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00003c27.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C27	23611 bytes
SHA-256: `40eef0d516f70b5693deca9cd4592c6eab1bc4e4663b2604d3d174b2c369ec66`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_01_off00014c59.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x14C59	23611 bytes
SHA-256: `1e4d4363723d55da0dd408e5592d48ff55c98252e008fdd55f4939251ef1a09d`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_02_off00025c8b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x25C8B	23611 bytes
SHA-256: `2892b9d577943fac627993023862c2270b68d01d9373cc40e5f4081cabc7a6c7`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_03_off00036cbd.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x36CBD	23611 bytes
SHA-256: `be39a37d6fe132354ceb7ed08c86f242f297c8d9540d7fc787aee28b718f38f0`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_04_off00047cef.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x47CEF	23611 bytes
SHA-256: `e2306c6b1b9a26d658ea334ab2118e3dd9fda4a76bf4f664816343a33c60c07f`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_05_off00059b31.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x59B31	23611 bytes
SHA-256: `b0d03b46431b92be111bf23e122eafa04617e344efec440912dcbfd886662b30`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_06_off0006ab80.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x6AB80	23611 bytes
SHA-256: `5bbcbd78263c461a991835ab7a88b29de163ad2c98723cb2b8168e5c9ef19547`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_07_off0007bbd1.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7BBD1	23611 bytes
SHA-256: `ddc5fc2d05d4b71a6169ddf900af33f737cd8d6b8d45620f0f0d2c62b03bb6e0`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_08_off0008cc22.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x8CC22	23611 bytes
SHA-256: `d1d7690cf074c157b8c0b482a3abc216fb91df058066a1c808efa2be6371b9a7`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_09_off0009dc73.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x9DC73	23611 bytes
SHA-256: `53f315168eb7ef65684c2c6de88eeed971f6c3cf1dec200c89c8ac39629d6099`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely

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