FE_APT_Backdoor_Linux32_SLOWPULSE_2
YARA-2025-1285
High
general
Active
No description available for this rule
FE_APT_Backdoor_Linux32_SLOWPULSE_2.yar
Valid Syntax
rule FE_APT_Backdoor_Linux32_SLOWPULSE_2
{
meta:
author = "Strozfriedberg"
date_created = "2021-04-16"
sha256 = "cd09ec795a8f4b6ced003500a44d810f49943514e2f92c81ab96c33e1c0fbd68"
reference_url = "https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html"
strings:
$sig = /[\x20-\x7F]{16}([\x20-\x7F\x00]+)\x00.{1,32}\xE9.{3}\xFF\x00+[\x20-\x7F][\x20-\x7F\x00]{16}/
// TOI_MAGIC_STRING
$exc1 = {ED C3 02 E9 98 56 E5 0C}
condition:
uint32(0) == 0x464C457F and (1 of ($sig*)) and (not (1 of ($exc*)))
}
Rule Metadata
author
Strozfriedberg
date_created
2021-04-16
sha256
cd09ec795a8f4b6ced003500a44d810f49943514e2f92c81ab96c33e1c0fbd68
reference_url
https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html
String Definitions
{"name":"$sig","value":"\/[\\x20-\\x7F]{16}([\\x20-\\x7F\\x00]+)\\x00.{1,32}\\xE9.{3}\\xFF\\x00+[\\x20-\\x7F][\\x20-\\x7F\\x00]{16}\/ \r\n\r\n \/\/ TOI_MAGIC_STRING"}
{"name":"$exc1","value":"{ED C3 02 E9 98 56 E5 0C}"}
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 FE_APT_Backdoor_Linux32_SLOWPULSE_2.yar /path/to/suspicious/file # Scan a directory recursively yara -r FE_APT_Backdoor_Linux32_SLOWPULSE_2.yar /path/to/directory/ # Scan with metadata output yara -m FE_APT_Backdoor_Linux32_SLOWPULSE_2.yar target_file # Scan process memory (Linux) yara FE_APT_Backdoor_Linux32_SLOWPULSE_2.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='FE_APT_Backdoor_Linux32_SLOWPULSE_2.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=FE_APT_Backdoor_Linux32_SLOWPULSE_2.yar /path/to/scan
Rule Information
YARA ID
YARA-2025-1285
Author
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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