YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_REGEORG_Tuneller_Generic
No description has been set in the source file - Signature Base
- Author
- Mandiant
- Date
- 2021-12-20
- Modified
- 2023-12-05
- Score / Quality
- 75 / 85
What this rule detects
No description has been set in the source file - Signature Base
It defines 8 patterns (8 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
rule SIGNATURE_BASE_REGEORG_Tuneller_Generic : FILE
{
meta:
= "No description has been set in the source file - Signature Base"
= "Mandiant"
= "a87979b7-2732-5a32-b3f3-a815a58b6589"
= "2021-12-20"
= "2023-12-05"
= "https://www.mandiant.com/resources/unc3524-eye-spy-email"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/webshell_regeorg.yar#L1-L20"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "ba22992ce835dadcd06bff4ab7b162f9"
= "1657928875c3cd2d5bf774929b0497d78f0211b321f8a4138cc9b8c80b9f99d6"
= 75
= 85
= "FILE"
= "2021-12-20"
strings:
$s1 = "System.Net.IPEndPoint"
$s2 = "Response.AddHeader"
$s3 = "Request.InputStream.Read"
$s4 = "Request.Headers.Get"
$s5 = "Response.Write"
$s6 = "System.Buffer.BlockCopy"
$s7 = "Response.BinaryWrite"
$s8 = "SocketException soex"
condition:
filesize < 1MB and 7 of them
}
Strings (8 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $s1 | text | "System.Net.IPEndPoint" | |
| $s2 | text | "Response.AddHeader" | |
| $s3 | text | "Request.InputStream.Read" | |
| $s4 | text | "Request.Headers.Get" | |
| $s5 | text | "Response.Write" | |
| $s6 | text | "System.Buffer.BlockCopy" | |
| $s7 | text | "Response.BinaryWrite" | |
| $s8 | text | "SocketException soex" |
Condition
filesize < 1MB and 7 of themIn plain words (Heuristic)
- The file must be smaller than 1MB (a cheap guard that skips large files).
- At least 7 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.
Sample hashes
Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).
- ba22992ce835dadcd06bff4ab7b162f9
Licence & attribution
Author: Mandiant
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: a87979b7-2732-5a32-b3f3-a815a58b6589
Metadata
| date_modified | 2021-12-20 |
|---|
Tags:FILE
Related rules
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2022-04-28
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- Suspicious / huntingSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20