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

Static analysis result for SHA-256 5afc684741548bd3…

MALICIOUS

Office (OLE) / .DOC

545.5 KB Created: 2009-12-11 11:47:44 Authoring application: Advanced Installer 16.2 build 436ecd62 First seen: 2026-05-11
MD5: 1fb62f0ff6c3f0362c319f805ad51285 SHA-1: 9a5db3d729bd87c8fb11553fe52ef5517263edd4 SHA-256: 5afc684741548bd3397741eec40f4a70aa358283d63ec608bc3ad49f7788ca2b
382 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer T1203 Exploitation for Client Execution

The sample is a malicious Office document containing an embedded PE executable, identified as 'embedded_office_00011a00.exe'. Heuristics indicate the use of CreateProcess and ShellExecute APIs, suggesting the document's intent is to execute this embedded payload. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic further implies the document may provide instructions for handling a password-protected archive, a common tactic to bypass gateway scanning before payload execution.

Heuristics 10

  • Embedded PE executable critical OLE_EMBEDDED_EXE
    MZ/PE header found inside document — possible embedded executable
  • PEB access via FS segment (x86) high SC_PEB_ACCESS
    PEB access via FS segment (x86)
    Disassembly
    x86 disassembly · validity: code (0.984) — 11/11 branch targets land on an instruction boundary (100% coherence)
    0003AA56  64a130000000      mov eax, dword ptr fs:[0x30]
0003AA5C  8b4068            mov eax, dword ptr [eax + 0x68]
0003AA5F  c1e808            shr eax, 8
0003AA62  a801              test al, 1
0003AA64  7510              jne 0x3aa76
0003AA66  ff7508            push dword ptr [ebp + 8]
0003AA69  ff1568b10310      call dword ptr [0x1003b168]
0003AA6F  50                push eax
0003AA70  ff1520b20310      call dword ptr [0x1003b220]
0003AA76  ff7508            push dword ptr [ebp + 8]
0003AA79  e84e000000        call 0x3aacc
0003AA7E  59                pop ecx
0003AA7F  ff7508            push dword ptr [ebp + 8]
0003AA82  ff15f0b10310      call dword ptr [0x1003b1f0]
0003AA88  cc                int3
0003AA89  6a00              push 0
0003AA8B  ff156cb20310      call dword ptr [0x1003b26c]
0003AA91  85c0              test eax, eax
0003AA93  7434              je 0x3aac9
0003AA95  b94d5a0000        mov ecx, 0x5a4d
0003AA9A  663908            cmp word ptr [eax], cx
0003AA9D  752a              jne 0x3aac9
0003AA9F  8b483c            mov ecx, dword ptr [eax + 0x3c]
0003AAA2  03c8              add ecx, eax
0003AAA4  813950450000      cmp dword ptr [ecx], 0x4550
0003AAAA  751d              jne 0x3aac9
0003AAAC  b80b010000        mov eax, 0x10b
0003AAB1  66394118          cmp word ptr [ecx + 0x18], ax
0003AAB5  75                .byte 0x75
  • Reference to CreateProcess API high SC_STR_CREATEPROCESS
    Reference to CreateProcess API
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
    Reference to GetProcAddress API
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://t2.symcb.com0 In document text (OLE body)
    • http://tl.symcd.com0&In document text (OLE body)
    • http://s.symcd.com06In document text (OLE body)
    • http://ts-ocsp.ws.symantec.com0In document text (OLE body)
    • http://t1.symcb.com/ThawtePCA.crl0In document text (OLE body)
    • http://tl.symcb.com/tl.crl0In document text (OLE body)
    • https://www.thawte.com/cps0/In document text (OLE body)
    • https://www.thawte.com/repository0WIn document text (OLE body)
    • http://tl.symcb.com/tl.crt0In document text (OLE body)
    • https://www.advancedinstaller.comIn document text (OLE body)
    • https://d.symcb.com/cps0%In document text (OLE body)
    • https://d.symcb.com/rpa0In document text (OLE body)
    • http://s.symcb.com/universal-root.crl0In document text (OLE body)
    • https://d.symcb.com/rpa0@In document text (OLE body)
    • http://ts-crl.ws.symantec.com/sha256-tss-ca.crl0In document text (OLE body)
    • http://ts-aia.ws.symantec.com/sha256-tss-ca.cer0(In document text (OLE body)
🗂 Part of campaign: symcd.com06 24 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_office_00011a00.exe embedded-pe Office MZ+PE at offset 0x11A00 486400 bytes
SHA-256: 65b80151452e93e30bb4767263f37e6739ad26c2adf06a0000d0715813c7935a
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, SC_STR_SHELLEXEC, SC_STR_LOADLIBRARY Static shellcode analysis recovered API/import strings: shell32.dll, ShellExecuteW, LoadLibraryW, GetProcAddress, kernel32.dll, KERNEL32.DLL Static shellcode analysis recovered command string(s): WScript.Quit()}else {try{BHWNHC95860AEED= new ActiveXObject("Scripting.FileSystemObject");KFNEWB10284HMYL= BHWNHC95860AEED.CreateTextFile(WYDCQM81051IECB+ "\\MEQMED77 Carved artifact contains 18 shell/COM execution token(s).

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