Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 67d55b2a6380b204…

MALICIOUS

Office (OLE) / .XLS

837.0 KB First seen: 2022-06-05
MD5: ac070ae20b57254f0ede7b564e0a97d3 SHA-1: 9fd367449658a4246f903a0714ad2dbda2fb026d SHA-256: 67d55b2a6380b204c52adfdf349440edaae852ad5b3ce0893f39ddcab649b4fc
284 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The file contains heavily obfuscated VBA macros, including Workbook_Open and Auto_Open routines, which are indicative of malicious intent. The macros utilize CreateObject and GetObject calls, suggesting the execution of external code or processes. The primary function appears to be downloading and executing a second-stage payload from one of the embedded URLs, likely leading to further compromise.

Heuristics 9

  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact info 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.
  • 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 https://detapp2110.urbanscience.net/GM_GLOBAL_BMI/ServiceGUID.aspx
    • https://detapp2110.urbanscience.net/GM_GLOBAL_BMI/api/DealerDataSubmission
    • https://vip-preprod.gmdbi.com/DBIGlobal/api/DealerDataSubmission
    • https://vip-preprod.gmdbi.com/DBIGlobal/ServiceGUID.aspx
    • https://vip-preprod.gmdbi.com/DBI/ServiceGUID.aspx
    • https://vip-preprod.gmdbi.com/DBI/api/DealerDataSubmission
    • https://www.autopartners.net/gmentsso/idpssoinit?metaAlias=/vsprealm/idp&spEntityID=https://gmdbi.com/dbi/login.aspx
    • https://www.gmdbi.com/DBI/api/DealerDataSubmission
    • https://www.gmdbi.com/DBI/ServiceGUID.aspx
    • https://www.autopartners.net/apps/DBI/DBIServices/DealerDataSubmission.svc
    • https://detapp2110.urbanscience.net/GM_GLOBAL_BMI/ServiceGUID.aspx�
    • https://detapp2110.urbanscience.net/GM_GLOBAL_BMI/api/DealerDataSubmission�
    • https://vip-preprod.gmdbi.com/DBIGlobal/api/DealerDataSubmission�
    • https://vip-preprod.gmdbi.com/DBIGlobal/ServiceGUID.aspx�
    • https://vip-preprod.gmdbi.com/DBI/ServiceGUID.aspx�
    • https://vip-preprod.gmdbi.com/DBI/api/DealerDataSubmission�
    • https://www.autopartners.net/gmentsso/idpssoinit?metaAlias=/vsprealm/idp&spEntityID=https://gmdbi.com/dbi/login.aspx�
    • https://www.gmdbi.com/DBI/api/DealerDataSubmission�
    • https://www.gmdbi.com/DBI/ServiceGUID.aspx�
    • https://preprod.vsp.gm.com/gmentsso/idpssoinit?metaAlias=/vsprealm/idp&spEntityID=https://vip-preprod.gmdbi.com/DBIGlobal/login.aspx
    • https://preprod.vsp.gm.com/apps_pp/DBI/DBIServices/DealerDataSubmission.svc
    • https://preprod.vsp.gm.com/gmentsso/idpssoinit?metaAlias=/vsprealm/idp&spEntityID=https://vip-preprod.gmdbi.com/DBIGlobal/login.aspx�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ca7a13e2434799d587335e13cf8a8bdb124ebe15470402a9f1d90fd87741b993		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 855566 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).

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