Xls.Dropper.Agent-7619529-0 RTF malware analysis — malicious · dfbe56103ba0f2a6

MALICIOUS

RTF

696.3 KB Created: 2020-01-09 18:35:00 First seen: 2021-08-25

MD5: 03d07c0f79542680bf9bbbc516026bd4 SHA-1: 90422e7cb1514b4d7f5ea74d3640f59c8ee64106 SHA-256: dfbe56103ba0f2a6a2c10134d0a7bb480180f4d313f8265ee6ea386f13919a90

182 Risk Score

Malware Insights

Xls.Dropper.Agent-7619529-0 · confidence 95%

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF file contains multiple embedded OLE objects, with one specifically triggering an update action that forces OLE activation. This strongly indicates the file is designed to exploit vulnerabilities or execute embedded code when opened. ClamAV identifies this as Xls.Dropper.Agent-7619529-0, a known dropper family.

Heuristics 6

ClamAV: Xls.Dropper.Agent-7619529-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Dropper.Agent-7619529-0
\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.
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.
OLE object data medium RTF_OBJDATA

RTF contains 4 \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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00002cf3.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x2CF3	72238 bytes
SHA-256: `ed34a800cde9e487cd7b667d66d2c7ef497b57720ba3b9413cd4620c9ecfbd09`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_01_off0002bc68.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x2BC68	72238 bytes
SHA-256: `b093805c61296fe1eafedda30ac409d62ed89958cc45671aee36e65eac25768b`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_02_off00054bdf.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x54BDF	72238 bytes
SHA-256: `89785590a886704c476dc12effd20a23bdb2b3052e65dc1b470ff0530abfcc31`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_03_off0007db56.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7DB56	72238 bytes
SHA-256: `0423578b97bcfa44526f0a9537f412e9deca23ee6d0d296cf662c3d56f5b4889`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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