TeamViwer_backdoor
YARA-2019-0046
High
general
Active
Detects malicious TeamViewer DLLs
TeamViwer_backdoor.yar
Valid Syntax
rule TeamViwer_backdoor
{
meta:
date = "2019-04-14"
description = "Detects malicious TeamViewer DLLs"
reference = "https://research.checkpoint.com/2019/finteam-trojanized-teamviewer-against-government-targets/"
strings:
// PostMessageW hook function
$x1 = {55 8b ec 8b 45 0c 3d 12 01 00 00 75 05 83 c8 ff eb 12 8b 55 14 52 8b 55 10 52 50 8b 45 08 50 e8}
condition:
uint16(0) == 0x5a4d and $x1
}
Rule Metadata
date
2019-04-14
description
Detects malicious TeamViewer DLLs
reference
https://research.checkpoint.com/2019/finteam-trojanized-teamviewer-against-government-targets/
String Definitions
{"name":"$x1","value":"{55 8b ec 8b 45 0c 3d 12 01 00 00 75 05 83 c8 ff eb 12 8b 55 14 52 8b 55 10 52 50 8b 45 08 50 e8}"}
Threat Analysis
This YARA rule is designed to detect general threats.
Severity Level: High
The rule uses pattern matching to identify specific byte sequences, strings, or behavioral patterns associated with malicious activity.
Detection Capabilities
- File-based detection for executables and documents
- Memory scanning for running processes
- Network traffic analysis support
Command Line Usage
# Scan a single file yara TeamViwer_backdoor.yar /path/to/suspicious/file # Scan a directory recursively yara -r TeamViwer_backdoor.yar /path/to/directory/ # Scan with metadata output yara -m TeamViwer_backdoor.yar target_file # Scan process memory (Linux) yara TeamViwer_backdoor.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='TeamViwer_backdoor.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=TeamViwer_backdoor.yar /path/to/scan
Rule Information
YARA ID
YARA-2019-0046
Author
Unknown
Repository
Created
August 19, 2025
Last Updated
August 19, 2025
Last Imported
Never
Threat Intelligence
Risk Level
High
Category
general
Detection Confidence
Analysis Pending
False Positive Rate
Not Available
Last Seen in Wild
No Data
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