YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_SUSP_Doc_Windowsinstaller_Call_Feb22_1
Triggers on docfiles executing windows installer. Used for deploying ThinBasic scripts.
- Author
- Nils Kuhnert
- Date
- 2022-02-26
- Modified
- 2023-12-05
- Score / Quality
- 65 / 85
What this rule detects
Triggers on docfiles executing windows installer. Used for deploying ThinBasic scripts.
Targets: OLE / legacy Office.
It defines 3 patterns (3 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
rule SIGNATURE_BASE_SUSP_Doc_Windowsinstaller_Call_Feb22_1 : FILE
{
meta:
= "Triggers on docfiles executing windows installer. Used for deploying ThinBasic scripts."
= "Nils Kuhnert"
= "8f2e8f91-74e0-5574-9c0a-1479d6114212"
= "2022-02-26"
= "2023-12-05"
= "https://twitter.com/threatinsight/status/1497355737844133895"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/gen_maldoc.yar#L1-L16"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "279182487ab7d35264adfbd0d122ee7634cd92ae1711de78ec7f20928df34f49"
= 65
= 85
= "FILE"
= "white"
strings:
$ = "WindowsInstaller.Installer$"
$ = "CreateObject"
$ = "InstallProduct"
condition:
uint32be( 0 ) == 0xd0cf11e0 and all of them
}
Strings (3 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $ | text | "WindowsInstaller.Installer$" | |
| $ | text | "CreateObject" | |
| $ | text | "InstallProduct" |
Condition
uint32be( 0 ) == 0xd0cf11e0 and all of themIn plain words (Heuristic)
- The file must start with the OLE header — legacy Office documents, MSI.
- All patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Licence & attribution
Author: Nils Kuhnert
Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a
Licence: Detection Rule License 1.1 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 8f2e8f91-74e0-5574-9c0a-1479d6114212
Metadata
| tlp | white |
|---|
Tags:FILE
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