YARA · SEKOIA.IO Community
SEKOIA_Infostealer_Win_Aurora
Finds Aurora samples based on characteristic strings
- Author
- Sekoia.io
- Date
- 2022-11-15
- Modified
- 2024-12-19
- Score / Quality
- 75 / 78
What this rule detects
Finds Aurora samples based on characteristic strings
Associated malware family: Aurora.
Targets: Windows PE.
It defines 21 patterns (21 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
infostealer-win-aurora.yarDetection Rule License 1.1
rule SEKOIA_Infostealer_Win_Aurora : FILE
{
meta:
= "Finds Aurora samples based on characteristic strings"
= "Sekoia.io"
= "22ae81b4-647f-4b46-9b2a-dd96e0615d65"
= "2022-11-15"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/infostealer_win_aurora.yar#L1-L35"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "e88cbb012ffb65aa8a70b76163a834c0bc4615b0effc93945c6d915e33c04549"
= 75
= 78
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$str00 = "I'm a teapot" ascii
$str01 = "wmic cpu get name" ascii
$str02 = "wmic path win32_VideoController get" ascii
$str03 = "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones" ascii
$str04 = "Exodus\\exodus.wallet" ascii
$str05 = "PaliWallet" ascii
$str06 = "cookies.sqlite" ascii
$str07 = "Startup\\Documents\\User Data" ascii
$str08 = "atomic\\Local Storage\\leveldb" ascii
$str09 = "com.liberty.jaxx\\IndexedDB" ascii
$str10 = "Guarda\\Local Storage\\leveldb" ascii
$str11 = "AppData\\Roaming\\Telegram Desktop\\tdata" ascii
$str12 = "Ethereum\\keystore" ascii
$str13 = "Coin98" ascii
$str14 = ".bat.cmd.com.css.exe.gif.htm.jpg.mjs.pdf.png.svg.xml.zip" ascii
$str15 = "type..eq.main.Grabber" ascii
$str16 = "type..eq.main.Loader_A" ascii
$str17 = "type..eq.net/http.socksUsernamePassword" ascii
$str18 = "powershell" ascii
$str19 = "start-process" ascii
$str20 = "http/httpproxy" ascii
condition:
uint16( 0 ) == 0x5A4D and 15 of them and filesize > 4MB
}
Strings (21 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $str00 | text | "I'm a teapot" | ascii |
| $str01 | text | "wmic cpu get name" | ascii |
| $str02 | text | "wmic path win32_VideoController get" | ascii |
| $str03 | text | "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones" | ascii |
| $str04 | text | "Exodus\\exodus.wallet" | ascii |
| $str05 | text | "PaliWallet" | ascii |
| $str06 | text | "cookies.sqlite" | ascii |
| $str07 | text | "Startup\\Documents\\User Data" | ascii |
| $str08 | text | "atomic\\Local Storage\\leveldb" | ascii |
| $str09 | text | "com.liberty.jaxx\\IndexedDB" | ascii |
| $str10 | text | "Guarda\\Local Storage\\leveldb" | ascii |
| $str11 | text | "AppData\\Roaming\\Telegram Desktop\\tdata" | ascii |
| $str12 | text | "Ethereum\\keystore" | ascii |
| $str13 | text | "Coin98" | ascii |
| $str14 | text | ".bat.cmd.com.css.exe.gif.htm.jpg.mjs.pdf.png.svg.xml.zip" | ascii |
| $str15 | text | "type..eq.main.Grabber" | ascii |
| $str16 | text | "type..eq.main.Loader_A" | ascii |
| $str17 | text | "type..eq.net/http.socksUsernamePassword" | ascii |
| $str18 | text | "powershell" | ascii |
| $str19 | text | "start-process" | ascii |
| $str20 | text | "http/httpproxy" | ascii |
Condition
uint16( 0 ) == 0x5A4D and 15 of them and filesize > 4MBIn plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- The file must be larger than 4MB.
- At least 15 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.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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: 22ae81b4-647f-4b46-9b2a-dd96e0615d65
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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