Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 022df2265ef03d31…

MALICIOUS

Office (OLE)

52.5 KB Created: 1999-11-03 17:04:00 Authoring application: Microsoft Word 8.0
MD5: 43f12a38d107a8eb9b61a37655a4ab96 SHA-1: 9fa6546446b68d8a76a4e4b863d7a644e15bd186 SHA-256: 022df2265ef03d31e905de402103ef49003164f1c78fff79770a68242186af9a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample is a Microsoft Word document containing VBA macros. The macro code, specifically within the `Document_Close` subroutine, attempts to write data to a file named 'c:\hsf????.sys' and another file 'c:\netldx.vxd'. The latter file contains instructions to connect to the IP address 209.201.88.110, authenticate as 'anonymous' with the password 'itsme@', and change to the 'incoming' directory. This strongly suggests the macro is designed to download and execute a second-stage payload.

Heuristics 4

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-31
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1cb1ce726b4ba47d904ae9d56eadaffe1178d234ad14621afc5feb1bfd396a9f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20856 bytes
Detection
ClamAV: Doc.Trojan.Marker-1
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.