YARA · SEKOIA.IO Community
SEKOIA_Loader_Win_Squirrelwaffle
Detect the Squirrelwaffle DLL
- Author
- Sekoia.io
- Date
- 2021-09-20
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Detect the Squirrelwaffle DLL
Associated malware family: Squirrelwaffle.
Targets: Windows PE.
It defines 2 patterns (2 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
loader-win-squirrelwaffle.yarDetection Rule License 1.1
rule SEKOIA_Loader_Win_Squirrelwaffle : FILE
{
meta:
= "Detect the Squirrelwaffle DLL"
= "Sekoia.io"
= "bea3125e-6e84-435f-855b-fd3239a0deac"
= "2021-09-20"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/loader_win_squirrelwaffle.yar#L1-L16"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "ab1a95f09564d0417d5c06c578d4dc8d790ec09bc67716d8c9e5207262a0594d"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$s1 = "AEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE" ascii
$s2 = "c:\\equal\\True\\bird_Select\\780\\true.pdb" ascii
condition:
uint16( 0 ) == 0x5A4D and all of them
}
Strings (2 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $s1 | text | "AEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE" | ascii |
| $s2 | text | "c:\\equal\\True\\bird_Select\\780\\true.pdb" | ascii |
Condition
uint16( 0 ) == 0x5A4D and all of themIn plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- 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: bea3125e-6e84-435f-855b-fd3239a0deac
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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