Concrete signature match: Trojan - Appears legitimate but performs malicious actions for .NET (Microsoft Intermediate Language) platform, family RedLineStealz
This detection identifies RedLine Stealer, a potent information-stealing trojan. It is designed to harvest sensitive data from infected systems, including browser passwords, cookies, cryptocurrency wallets, and system information, and exfiltrate it to an attacker's server.
Relevant strings associated with this threat: - (38F431A549411AEB32810068A4C83250B2D31E15 (PEHSTR)
rule Trojan_MSIL_RedLineStealz_A_2147924577_0
{
meta:
author = "threatcheck.sh"
detection_name = "Trojan:MSIL/RedLineStealz.A!MTB"
threat_id = "2147924577"
type = "Trojan"
platform = "MSIL: .NET intermediate language scripts"
family = "RedLineStealz"
severity = "Critical"
info = "MTB: Microsoft Threat Behavior"
signature_type = "SIGNATURE_TYPE_PEHSTR"
threshold = "1"
strings_accuracy = "High"
strings:
$x_1_1 = "38F431A549411AEB32810068A4C83250B2D31E15" ascii //weight: 1
condition:
(filesize < 20MB) and
(all of ($x*))
}f57942d4a1f1dcec2520d78db5ee4ca7b217271bc52f275c24a4238212eae5061e9fcd3df0e86145d3ef878d875766c98e6012fd51725e2ebc61c38aa7544fd1Isolate the affected host from the network immediately. Run a full antivirus scan to ensure all malicious components are removed. Reset all critical passwords (email, banking, corporate accounts) from a separate, uninfected device as they were likely compromised.