YARA · SEKOIA.IO Community
SEKOIA_Latrodectus_Br4_Js_Dropper
Detect the JS script used to drop Latrodectus
- Author
- Sekoia.io
- Date
- 2024-06-25
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Detect the JS script used to drop Latrodectus
Associated malware family: Latrodectus.
It defines 2 patterns (2 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
latrodectus-br4-js-dropper.yarDetection Rule License 1.1
rule SEKOIA_Latrodectus_Br4_Js_Dropper
{
meta:
= "Detect the JS script used to drop Latrodectus"
= "Sekoia.io"
= "042a598d-66fa-4994-a793-228355abd5dd"
= "2024-06-25"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/latrodectus_br4_js_dropper.yar#L1-L16"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "a835bd9a9ad68fd2f285ec5c04a5c78ba5ca85381ff30048ac375bef220fd72f"
= 75
= 80
= ""
= "1.0"
= "TLP:CLEAR"
strings:
$s1 = " installer.InstallProduct(msiPath);" ascii
$s2 = "new ActiveXObject(\"WindowsInstaller.Installer\");" ascii
condition:
all of them
}
Strings (2 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $s1 | text | " installer.InstallProduct(msiPath);" | ascii |
| $s2 | text | "new ActiveXObject(\"WindowsInstaller.Installer\");" | ascii |
Condition
all of themIn plain words (Heuristic)
- All patterns in the rule must match.
Test this rule in your browser
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References
Licence & attribution
Author: Sekoia.io
Source repository: SEKOIA.IO Community @ a438a5901a
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: 042a598d-66fa-4994-a793-228355abd5dd
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
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