sigma_ransomware
YARA-2018-3769
Critical
general
Active
No description available for this rule
sigma_ransomware.yar
Valid Syntax
rule sigma_ransomware {
meta:
author = "J from THL <j@techhelplist.com>"
date = "20180509"
reference1 = "https://www.virustotal.com/#/file/705ad78bf5503e6022f08da4c347afb47d4e740cfe6c39c08550c740c3be96ba"
reference2 = "https://www.virustotal.com/#/file/bb3533440c27a115878ae541aba3bda02d441f3ea1864b868862255aabb0c8ff"
version = 1
maltype = "Ransomware"
filetype = "memory"
strings:
$a = ".php?"
$b = "uid="
$c = "&uname="
$d = "&os="
$e = "&pcname="
$f = "&total="
$g = "&country="
$h = "&network="
$i = "&subid="
condition:
all of them
}
Rule Metadata
author
J from THL <j@techhelplist.com>
date
20180509
reference1
https://www.virustotal.com/#/file/705ad78bf5503e6022f08da4c347afb47d4e740cfe6c39c08550c740c3be96ba
reference2
https://www.virustotal.com/#/file/bb3533440c27a115878ae541aba3bda02d441f3ea1864b868862255aabb0c8ff
maltype
Ransomware
filetype
memory
String Definitions
{"name":"$a","value":"\".php?\""}
{"name":"$b","value":"\"uid=\""}
{"name":"$c","value":"\"&uname=\""}
{"name":"$d","value":"\"&os=\""}
{"name":"$e","value":"\"&pcname=\""}
{"name":"$f","value":"\"&total=\""}
{"name":"$g","value":"\"&country=\""}
{"name":"$h","value":"\"&network=\""}
{"name":"$i","value":"\"&subid=\""}
Threat Analysis
This YARA rule is designed to detect general threats.
Severity Level: Critical
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 sigma_ransomware.yar /path/to/suspicious/file # Scan a directory recursively yara -r sigma_ransomware.yar /path/to/directory/ # Scan with metadata output yara -m sigma_ransomware.yar target_file # Scan process memory (Linux) yara sigma_ransomware.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='sigma_ransomware.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=sigma_ransomware.yar /path/to/scan
Rule Information
YARA ID
YARA-2018-3769
Repository
Created
August 19, 2025
Last Updated
August 19, 2025
Last Imported
Never
Threat Intelligence
Risk Level
Critical
Category
general
Detection Confidence
Analysis Pending
False Positive Rate
Not Available
Last Seen in Wild
No Data
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