user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:Win32/LummaStealer.RH!MTB
Trojan:Win32/LummaStealer.RH!MTB - Windows Defender threat signature analysis

Trojan:Win32/LummaStealer.RH!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:Win32/LummaStealer.RH!MTB
Classification:
Type:Trojan
Platform:Win32
Family:LummaStealer
Detection Type:Concrete
Known malware family with identified signatures
Variant:RH
Specific signature variant within the malware family
Suffix:!MTB
Detected via machine learning and behavioral analysis
Detection Method:Behavioral
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Trojan - Appears legitimate but performs malicious actions for 32-bit Windows platform, family LummaStealer

Summary:

Trojan:Win32/LummaStealer.RH!MTB is a concrete detection for a variant of the Lumma Stealer malware, confirmed by machine learning behavioral analysis. This sophisticated info-stealer leverages advanced techniques like API hooking, LOLBIN abuse (mshta, regsvr32, rundll32, PowerShell), BITS jobs, and scheduled tasks for persistence, evasion, and ultimately, exfiltration of sensitive user data.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - B.imports (PEHSTR_EXT)
 - !#HSTR:StringCodeForMshta.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.C!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.L!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.O!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRegsvr32.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRundll32.A!pli (PEHSTR_EXT)
 - rundll32 (PEHSTR_EXT)
 - !#HSTR:StringCodeForBITSJobs.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForPowerShell.G!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForScheduledTask.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForDataEncoding.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.J!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.K!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteFileCopy.B!pli (PEHSTR_EXT)
 - !#HSTR:ExecutionGuardrails (PEHSTR_EXT)
 - !#HSTR:StringCodeForFileDeletion.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.M!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForNetshHelperDLL.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteServices.A!pli (PEHSTR_EXT)
YARA Rule:
rule Trojan_Win32_LummaStealer_RH_2147848410_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:Win32/LummaStealer.RH!MTB"
        threat_id = "2147848410"
        type = "Trojan"
        platform = "Win32: Windows 32-bit platform"
        family = "LummaStealer"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "8"
        strings_accuracy = "Low"
    strings:
        $x_1_1 = {40 00 00 42 2e 69 6d 70 6f 72 74 73 00 10 00 00 00 10 06 00 00 10 00 00 00 10 06 00 00 00 00 00 00 00 00 00 00 00 00 00 60 00 00 60}  //weight: 1, accuracy: High
        $x_2_2 = {50 45 00 00 4c 01 05 00 fe 3b 2b 68 00 00 00 00 00 00 00 00 e0 00 03 01 0b 01 0e 00 00 de 04 00 00 92 00 00 00 00 00 00 40 77 02 00 00 10}  //weight: 2, accuracy: High
        $x_5_3 = {55 89 e5 53 57 56 81 ec 24 08 00 00 8b 4d 08 8d 05 44 23 ?? ?? 89 85 d4 fa ff ff 0f b7 01 89 85 08 fe ff ff 8a 8d b8 fe ff ff 88 8d b4 fe ff ff c6 45 c4 8d c6 45 c5 9b c6 45 c6 42 c6 45 c7 43 31 c9 83 f9 04 73 4c}  //weight: 5, accuracy: Low
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: c3972dc848367b7bb2d88efcf016585c055c744872b8373c18f71971d64ad2f8
c3972dc848367b7bb2d88efcf016585c055c744872b8373c18f71971d64ad2f8
15/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected system to prevent further compromise and data exfiltration. Conduct a thorough full system scan with an updated antivirus/EDR, ensure all detected malicious files are removed, and meticulously review system logs for indicators of compromise. All potentially compromised credentials, especially for online services, banking, and cryptocurrency wallets, must be reset immediately.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 15/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊