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

Static analysis result for SHA-256 2d91775dbfbff57c…

MALICIOUS

Office (OLE) / .DOC

963.0 KB Created: 1996-02-12 19:56:00 Authoring application: Microsoft Word 6.0
MD5: 9f9b6c206821ed9c5598cc9ad504fe6e SHA-1: 16a1270e08fc67099ec8a0efd2015ed5bab11f83 SHA-256: 2d91775dbfbff57c9f35753de9f9fb203d925d989cfae9be225fa0cf843e715c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1218 Signed Binary Proxy Execution T1071 Application Layer Protocol

The sample exhibits high-confidence heuristics for heap spraying and references to LoadLibrary and GetProcAddress APIs, suggesting the execution of shellcode. The push-string heuristic indicates a reference to 'explorer.exe', likely for process injection or execution. The embedded URL is likely used to download and execute a second-stage payload. The document body content is benign and appears to be a lure.

Heuristics 6

  • Heap-spray pattern detected high SC_HEAP_SPRAY
    Repeated 0x41 (A) bytes found
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
    Reference to GetProcAddress API
  • NOP-equivalent sled detected medium SC_NOP_EQUIV_SLED
    Long run of 0x41 bytes
  • x86 push-string-call medium SC_PUSH_STRING
    Shellcode-style PUSH imm32 sequence builds an execution, network, or Windows API string on the stack
  • 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://192.168.1.133/index.php?arch=i386&os=windows&version=unknown&c=BhU49IaF&t=4a42d6864cedc797&random=1024393264

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