Intitial release

rules/infosteal.yar

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+import "pe"
+
+rule RayXStealer {
+    meta:
+        description = "Detects RayX Stealer malware"
+        author = "Malware Researcher"
+        severity = "High"
+        date = "2023-01-01"
+    strings:
+        $s1 = "rayxstealer" nocase ascii wide
+        $s2 = "ray-x" nocase ascii wide
+        $token1 = "discordwebhook" nocase ascii wide
+        $token2 = "getTokens" nocase ascii wide
+        $browser1 = "Chrome" nocase ascii wide
+        $browser2 = "Edge" nocase ascii wide
+        $browser3 = "passwords" nocase ascii wide
+        $browser4 = "cookies" nocase ascii wide
+    condition:
+        ($s1 or $s2) and 
+        1 of ($token*) and
+        2 of ($browser*)
+}
+
+rule PysilonStealer {
+    meta:
+        description = "Detects Pysilon Stealer malware"
+        author = "Malware Researcher"
+        severity = "High"
+        date = "2023-01-01"
+    strings:
+        $id1 = "pysilon" nocase ascii wide
+        $id2 = "pysilonstealer" nocase ascii wide
+        $grab1 = "grab_discord" nocase ascii wide
+        $grab2 = "grab_passwords" nocase ascii wide
+        $grab3 = "grab_cookies" nocase ascii wide
+        $grab4 = "system_info" nocase ascii wide
+        $net1 = "webhook" nocase ascii wide
+        $net2 = "sendData" nocase ascii wide
+    condition:
+        1 of ($id*) and 
+        2 of ($grab*) and 
+        1 of ($net*)
+}
+
+rule ExelaStealer {
+    meta:
+        description = "Detects Exela Stealer malware"
+        author = "Malware Researcher"
+        severity = "High"
+        date = "2023-01-01"
+    strings:
+        $id = "exelastealer" nocase ascii wide
+        $grab1 = "grab_discord" nocase ascii wide
+        $grab2 = "grab_browsers" nocase ascii wide
+        $grab3 = "grab_wallets" nocase ascii wide
+        $net1 = "webhook_url" nocase ascii wide
+        $net2 = "send_report" nocase ascii wide
+    condition:
+        $id or (2 of ($grab*) and 1 of ($net*))
+}
+
+rule BlankGrabber {
+    meta:
+        description = "Detects BlankGrabber/AmnesiaGrabber malware"
+        author = "Malware Researcher"
+        severity = "High"
+        date = "2023-01-01"
+    strings:
+        $id1 = "blankgrabber" nocase ascii wide
+        $id2 = "amnesia" nocase ascii wide
+        $func1 = "grab_tokens" nocase ascii wide
+        $func2 = "grab_cookies" nocase ascii wide
+        $func3 = "grab_passwords" nocase ascii wide
+        $func4 = "screenshot" nocase ascii wide
+        $net1 = "webhook" nocase ascii wide
+        $enc1 = "encrypt" nocase ascii wide
+        $enc2 = "decrypt" nocase ascii wide
+    condition:
+        1 of ($id*) and 
+        2 of ($func*) and 
+        ($net1 or 1 of ($enc*))
+}
+
+rule LunaGrabber {
+    meta:
+        description = "Detects Luna Grabber malware"
+        author = "Malware Researcher"
+        severity = "High"
+        date = "2023-01-01"
+    strings:
+        $id = "lunagrabber" nocase ascii wide
+        $grab1 = "grab_tokens" nocase ascii wide
+        $grab2 = "grab_password" nocase ascii wide
+        $grab3 = "grab_cookie" nocase ascii wide
+        $net = "webhook" nocase ascii wide
+    condition:
+        $id or (2 of ($grab*) and $net)
+}
+
+rule UmbralStealer {
+    meta:
+        description = "Detects Umbral Stealer malware"
+        author = "Malware Researcher"
+        severity = "High"
+        date = "2023-01-01"
+    strings:
+        $id = "umbral" nocase ascii wide
+        $grab1 = "get_tokens" nocase ascii wide
+        $grab2 = "get_passwords" nocase ascii wide
+        $grab3 = "get_cookies" nocase ascii wide
+        $grab4 = "get_wallets" nocase ascii wide
+        $net1 = "webhook" nocase ascii wide
+        $net2 = "send_data" nocase ascii wide
+    condition:
+        $id or (2 of ($grab*) and 1 of ($net*))
+}
+
+rule DiscordRatStealer {
+    meta:
+        description = "Detects Discord RAT malware"
+        author = "Malware Researcher"
+        severity = "High"
+        date = "2023-01-01"
+    strings:
+        $id1 = "discordrat" nocase ascii wide
+        $id2 = "discord_rat" nocase ascii wide
+        $cmd1 = "command_handler" nocase ascii wide
+        $cmd2 = "remote_control" nocase ascii wide
+        $cmd3 = "remote_cmd" nocase ascii wide
+        $discord1 = "discord.py" nocase ascii wide
+        $discord2 = "discord_webhook" nocase ascii wide
+        $discord3 = "bot.command" nocase ascii wide
+    condition:
+        1 of ($id*) and 
+        (1 of ($cmd*) and 1 of ($discord*))
+}