MeldSecurity
Press Enter to search
CVE Database & Search →
Sign In Get Started

APT_HackTool_MSIL_TITOSPECIAL_1

YARA-2025-0921 Medium general Active
No description available for this rule
APT_HackTool_MSIL_TITOSPECIAL_1.yar Valid Syntax 
// Copyright 2020 by FireEye, Inc.
// You may not use this file except in compliance with the license. The license should have been received with this file. You may obtain a copy of the license at:
// https://github.com/fireeye/red_team_tool_countermeasures/blob/master/LICENSE.txt
rule APT_HackTool_MSIL_TITOSPECIAL_1
{
    meta:
        date_created = "2020-11-25"
        date_modified = "2020-11-25"
        md5 = "4bf96a7040a683bd34c618431e571e26"
        rev = 5
        author = "FireEye"
    strings:
        $ind_dump = { 1F 10 16 28 [2] 00 0A 6F [2] 00 0A [50-200] 18 19 18 73 [2] 00 0A 13 [1-4] 06 07 11 ?? 6F [2] 00 0A 18 7E [2] 00 0A 7E [2] 00 0A 7E [2] 00 0A 28 [2] 00 06 }
        $ind_s1 = "NtReadVirtualMemory" fullword wide
        $ind_s2 = "WriteProcessMemory" fullword
        $shellcode_x64 = { 4C 8B D1 B8 3C 00 00 00 0F 05 C3 }
        $shellcode_x86 = { B8 3C 00 00 00 33 C9 8D 54 24 04 64 FF 15 C0 00 00 00 83 C4 04 C2 14 00 }
    condition:
        (uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and all of ($ind*) and any of ($shellcode* )
}

Rule Metadata

date_created
2020-11-25
date_modified
2020-11-25
md5
4bf96a7040a683bd34c618431e571e26
author
FireEye

String Definitions

{"name":"$ind_dump","value":"{ 1F 10 16 28 [2] 00 0A 6F [2] 00 0A [50-200] 18 19 18 73 [2] 00 0A 13 [1-4] 06 07 11 ?? 6F [2] 00 0A 18 7E [2] 00 0A 7E [2] 00 0A 7E [2] 00 0A 28 [2] 00 06 }"}
{"name":"$ind_s1","value":"\"NtReadVirtualMemory\" fullword wide"}
{"name":"$ind_s2","value":"\"WriteProcessMemory\" fullword"}
{"name":"$shellcode_x64","value":"{ 4C 8B D1 B8 3C 00 00 00 0F 05 C3 }"}
{"name":"$shellcode_x86","value":"{ B8 3C 00 00 00 33 C9 8D 54 24 04 64 FF 15 C0 00 00 00 83 C4 04 C2 14 00 }"}

Threat Analysis

This YARA rule is designed to detect general threats.

Severity Level: Medium

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 APT_HackTool_MSIL_TITOSPECIAL_1.yar /path/to/suspicious/file

# Scan a directory recursively
yara -r APT_HackTool_MSIL_TITOSPECIAL_1.yar /path/to/directory/

# Scan with metadata output
yara -m APT_HackTool_MSIL_TITOSPECIAL_1.yar target_file

# Scan process memory (Linux)
yara APT_HackTool_MSIL_TITOSPECIAL_1.yar /proc/[pid]/exe

Integration Examples

Python (yara-python)

import yara
rules = yara.compile(filepath='APT_HackTool_MSIL_TITOSPECIAL_1.yar')
matches = rules.match('/path/to/file')

ClamAV Integration

clamscan --yara-rules=APT_HackTool_MSIL_TITOSPECIAL_1.yar /path/to/scan

Rule Information

YARA ID
YARA-2025-0921
Author
Created
August 19, 2025
Last Updated
August 19, 2025
Last Imported
Never

Threat Intelligence

Risk Level Medium
Category general
Detection Confidence Analysis Pending
False Positive Rate Not Available
Last Seen in Wild No Data

Related Rules

HackTool_MSIL_INVEIGHZERO_1
YARA-2025-0922
Medium
HackTool_MSIL_CoreHound_1
YARA-2025-0923
Medium
APT_Dropper_Win64_MATRYOSHKA_1
YARA-2025-0924
Medium
Tool_MSIL_CSharpUtils_1
YARA-2025-0925
Medium
Loader_MSIL_WildChild_1
YARA-2025-0926
Medium

Export Options

Similar Rules in general

YARA-2023-0001 CRI

Detect_Mimic_Ransomware

Detect_Mimic_Ransomware
YARA-2023-0002 MED

SystemBC_malware

Detect_SystemBC
YARA-2023-0003 MED

detect_catB

detect_CatB_ransomware
YARA-2022-0001 MED

detect_Typhon_Stealer

detect_Typhon_Stealer
YARA-2023-0004 MED

Nosu_stealer

Detect_Nosu_stealer
YARA-2022-0002 MED

detect_Lumma_stealer

detect_Lumma_stealer
YARA-2022-0003 MED

detect_StrelaStealer

detect_StrelaStealer
YARA-2022-0004 MED

detect_silence_Downloader

detect_silence_Downloader