Malicious MS Office Document analysis – bd3638d874cd

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This sample is a 244.5 KB MS Office Document for which Malva.RE's static analysis did not establish a malicious verdict. Static analysis extracted 28 embedded or derived files. It matches 12 YARA rules. Observed behaviours map to MITRE ATT&CK T1027, T1059.005 and T1105. The file was analysed statically: it was parsed and decompiled, never executed.

SHA256: bd3638d874cd3365499e672b2951c6a8cf856b4349abced45aa77d6e991ce946
MD5: 16730c05015985e503258f87288f88d6
Verdict: Malicious
File type: MS Office Document · 244.5 KB
MITRE ATT&CK: T1027 T1059.005 T1105

Cite this report: https://app.malva.re/sha256/bd3638d874cd3365499e672b2951c6a8cf856b4349abced45aa77d6e991ce946

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File

Type

Microsoft Office Document

Size

250.37 KB · 250,368 B

First seen

2026-10-26 07:30 · 4 days ago

Last seen

2026-10-26 07:30 · 4 days ago

Last analysis

2026-10-26 07:30 · 4 days ago

Hashes

MD5 16730c05015985e503258f87288f88d6 Sha1 f8068f0314277fcfcccd2fc1f0f125a7f9de9f56 Sha256 bd3638d874cd3365499e672b2951c6a8cf856b4349abced45aa77d6e991ce946 Sha384 80cd419a7e3aa7482fc712d60411b94f5a676411fe077c2f33a5d2e1152b09c9e6ac21963ae46ea973b09ba00239867d Sha512 36c6f905030f082d536a927670880528a215e8c91328356d718af38192ad456873b8180a41dbdf750ec657346e7b7e7c4316fcc6e1041f12d1a78f1e5f9ed3f0 SSDeep 6144:yxEtjPOtioVjDGUU1qfDlavx+W2QnALrQsHBGilkW8a+TJJp/vC7zoVmzV4ZeTY3:okskWOlCAImZYMh TLSH 5C34AE53B2529DC2D54C83F46D9787EA2F21EF09DA56AFCB2150BF0EFB702924C1A125

17 malicious · 29 files

OFF16730c05015985e503258f87288f88d6

BINRoot Entry

BINCompObj

BINWorkbook

BINSummaryInformation

BINDocumentSummaryInformation

BIN_VBA_PROJECT_CUR

BINPROJECT

BINPROJECTwm

BINVBA

BINdir

VBAModule1

VBS[Stored VBA]

VBS[Stored VBA].deobfuscated.vbs

VBA[PCode]

VBS[Decompiled VBA]

VBS[Decompiled VBA].deobfuscated.vbs

VBA[Full Diff]

VBA[Partial Diff]

BIN__SRP_0

BIN__SRP_1

BIN__SRP_2

BIN__SRP_3

VBAThisWorkbook

VBS[Stored VBA]

VBS[Stored VBA].deobfuscated.vbs

VBA[PCode]

VBS[Decompiled VBA]

VBS[Decompiled VBA].deobfuscated.vbs

VBS[Full Diff]

VBS[Partial Diff]

BIN_VBA_PROJECT

STICH beta Structural Threat Infection Chain Hash

A content-independent fingerprint of the infection method: successive formats, internal objects and MITRE techniques from the initial file to each final payload.

STICH Path = the fingerprint (canonical chain with techniques) STICH Shape = structure only Only determinant branches produce STICH Paths.

5 / 5

Path ole:doc~T1027~T1059.005~T1564.007>bin

Shape ole:doc>bin

malicious 2 nodes

Path ole:doc~T1027~T1059.005~T1564.007>ole:vba~T1059.005

Shape ole:doc>ole:vba

malicious 2 nodes

Trace COM ordonnée UNKNWOWNmalicious

line 2huhuhuhuhuhuhuhuhuhuhu

Trace COM ordonnée UNKNWOWNmalicious

line 4huhuhuhuhuhuhuhuhuhuhu

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	Module Name0
	Module1	VBA Stomping ATT&CK T1564.007 Malicious Malicious Document VBA Macro
PCode Decompiled VBA Stored VBA Partial Diff. Full Diff. Missing P-Code: The Office document under analysis has been identified as having undergone VBA Purging techniques, as the P-Code block within the document is currently inaccessible. As a result, the decompilation of the code was not possible, leaving only the stored code available in textual format for analysis. VBA Purging essentially involves the elimination of the PerformanceCache section from the module streams. To fully erase any traces of the P-Code section, the MODULEOFFSET between the two sections is adjusted to 0 by altering the _VBA_PROJECT stream, and all SRP streams that also house PerformanceCache data are removed. Following the removal of the compiled code, antivirus engines and Yara rules, which depend on precise string matches, are rendered ineffective. This allows macros to bypass them effortlessly, owing to the compressed format of the remaining source code.
	ThisWorkbook	VBA Stomping ATT&CK T1564.007 Malicious Malicious Document Blacklist VBA VBA Macro
PCode Decompiled VBA Stored VBA Partial Diff. Full Diff. Missing P-Code: The Office document under analysis has been identified as having undergone VBA Purging techniques, as the P-Code block within the document is currently inaccessible. As a result, the decompilation of the code was not possible, leaving only the stored code available in textual format for analysis. VBA Purging essentially involves the elimination of the PerformanceCache section from the module streams. To fully erase any traces of the P-Code section, the MODULEOFFSET between the two sections is adjusted to 0 by altering the _VBA_PROJECT stream, and all SRP streams that also house PerformanceCache data are removed. Following the removal of the compiled code, antivirus engines and Yara rules, which depend on precise string matches, are rendered ineffective. This allows macros to bypass them effortlessly, owing to the compressed format of the remaining source code.

16730c05015985e503258f87288f88d6

Overview

Summary by MalvaGPT

Characteristics

File Structure

Artefacts2

16730c05015985e503258f87288f88d6 (250.37 KB)

File Structure

Artefacts2