Trusted Design

Cmstar Downloader: Lurid and Enfal's New Cousin

概要

In recent weeks, Unit 42 has been analyzing delivery documents used in spear-phishing attacks that drop a custom downloader used in cyber espionage attacks. This specific downloader, Cmstar, is associated with the Lurid downloader also known as ‘Enfal’. Cmstar was named for the log message ‘CM**’ used by the downloader.

Created: 2026-02-23

Indicators

類似Pulses

このPulseに関連する脅威アクター (事実ベース)

Confucius

Score: 5.47
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1221 - Template Injection
MITREへのリンク →

Kimsuky

Score: 16.91
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036.004 - Masquerade Task or Service
  • T1027.012 - LNK Icon Smuggling
  • T1218.010 - Regsvr32
  • T1598 - Phishing for Information
MITREへのリンク →

Sidewinder

Score: 8.40
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1598.002 - Spearphishing Attachment
MITREへのリンク →

FIN7

Score: 7.35
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036.004 - Masquerade Task or Service
  • T1195.002 - Compromise Software Supply Chain
MITREへのリンク →

Sandworm Team

Score: 9.89
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
  • T1195.002 - Compromise Software Supply Chain
MITREへのリンク →

Mustang Panda

Score: 8.62
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1027.012 - LNK Icon Smuggling
MITREへのリンク →

FIN8

Score: 5.07
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1573.002 - Asymmetric Cryptography
MITREへのリンク →

APT32

Score: 11.81
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
  • T1036.004 - Masquerade Task or Service
  • T1218.010 - Regsvr32
MITREへのリンク →

Lazarus Group

Score: 4.42
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036.004 - Masquerade Task or Service
MITREへのリンク →

Leviathan

Score: 5.07
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1218.010 - Regsvr32
MITREへのリンク →

ZIRCONIUM

Score: 11.63
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
  • T1036 - Masquerading
  • T1036.004 - Masquerade Task or Service
  • T1598 - Phishing for Information
MITREへのリンク →

Magic Hound

Score: 6.00
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
  • T1036.004 - Masquerade Task or Service
MITREへのリンク →

OilRig

Score: 7.25
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
  • T1573.002 - Asymmetric Cryptography
MITREへのリンク →

Windshift

Score: 4.51
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
MITREへのリンク →

Cobalt Group

Score: 10.74
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1218.010 - Regsvr32
  • T1195.002 - Compromise Software Supply Chain
  • T1573.002 - Asymmetric Cryptography
MITREへのリンク →

TA2541

Score: 5.07
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1573.002 - Asymmetric Cryptography
MITREへのリンク →

RedCurl

Score: 5.07
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1573.002 - Asymmetric Cryptography
MITREへのリンク →

Storm-1811

Score: 3.63
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1036 - Masquerading
MITREへのリンク →

Wizard Spider

Score: 4.42
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036.004 - Masquerade Task or Service
MITREへのリンク →

Patchwork

Score: 4.78
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
MITREへのリンク →

LazyScripter

Score: 4.51
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
MITREへのリンク →

APT42

Score: 4.19
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1573.002 - Asymmetric Cryptography
MITREへのリンク →

Scattered Spider

Score: 5.90
Matched TTPs:
  • T1598.003 - Spearphishing Link
  • T1598 - Phishing for Information
MITREへのリンク →

APT28

Score: 16.65
Matched TTPs:
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
  • T1598 - Phishing for Information
  • T1498 - Network Denial of Service
  • T1221 - Template Injection
MITREへのリンク →

Star Blizzard

Score: 6.95
Matched TTPs:
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1598.002 - Spearphishing Attachment
MITREへのリンク →

Moonstone Sleet

Score: 9.70
Matched TTPs:
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1195.002 - Compromise Software Supply Chain
  • T1598 - Phishing for Information
MITREへのリンク →

CURIUM

Score: 3.33
Matched TTPs:
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
MITREへのリンク →

Dragonfly

Score: 13.03
Matched TTPs:
  • T1598.003 - Spearphishing Link
  • T1566.001 - Spearphishing Attachment
  • T1598.002 - Spearphishing Attachment
  • T1195.002 - Compromise Software Supply Chain
  • T1221 - Template Injection
MITREへのリンク →

Tropic Trooper

Score: 6.77
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1573.002 - Asymmetric Cryptography
  • T1221 - Template Injection
MITREへのリンク →

FIN6

Score: 5.72
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1036.004 - Masquerade Task or Service
  • T1573.002 - Asymmetric Cryptography
MITREへのリンク →

BRONZE BUTLER

Score: 3.06
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
MITREへのリンク →

WIRTE

Score: 3.62
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1218.010 - Regsvr32
MITREへのリンク →

menuPass

Score: 3.06
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
MITREへのリンク →

Threat Group-3390

Score: 3.80
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1195.002 - Compromise Software Supply Chain
MITREへのリンク →

Gamaredon Group

Score: 7.87
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1027.012 - LNK Icon Smuggling
  • T1221 - Template Injection
MITREへのリンク →

Inception

Score: 6.77
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1218.010 - Regsvr32
  • T1221 - Template Injection
MITREへのリンク →

TA551

Score: 5.81
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
  • T1218.010 - Regsvr32
MITREへのリンク →

APT41

Score: 5.90
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1036.004 - Masquerade Task or Service
  • T1195.002 - Compromise Software Supply Chain
MITREへのリンク →

Winter Vivern

Score: 5.16
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
  • T1036.004 - Masquerade Task or Service
MITREへのリンク →

APT19

Score: 3.62
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1218.010 - Regsvr32
MITREへのリンク →

SideCopy

Score: 4.50
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1598.002 - Spearphishing Attachment
MITREへのリンク →

Nomadic Octopus

Score: 3.06
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
MITREへのリンク →

DarkHydrus

Score: 4.03
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1221 - Template Injection
MITREへのリンク →

PLATINUM

Score: 3.06
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
MITREへのリンク →

Contagious Interview

Score: 6.72
Matched TTPs:
  • T1036 - Masquerading
  • T1204.004 - Malicious Copy and Paste
MITREへのリンク →

FIN13

Score: 4.28
Matched TTPs:
  • T1036 - Masquerading
  • T1036.004 - Masquerade Task or Service
MITREへのリンク →

Storm-0501

Score: 4.84
Matched TTPs:
  • T1036.004 - Masquerade Task or Service
  • T1218.010 - Regsvr32
MITREへのリンク →

Axiom

Score: 4.54
Matched TTPs:
  • T1001.002 - Steganography
MITREへのリンク →

このPulseに関連する脅威アクター (推論ベース)

APT28

Score: 0.78
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1498 - Network Denial of Service
  • T1036 - Masquerading
  • T1221 - Template Injection
  • T1598 - Phishing for Information
  • T1598.003 - Spearphishing Link
MITREへのリンク →

Kimsuky

Score: 0.77
Matched TTPs:
  • T1027.012 - LNK Icon Smuggling
  • T1566.001 - Spearphishing Attachment
  • T1036.004 - Masquerade Task or Service
  • T1598 - Phishing for Information
  • T1218.010 - Regsvr32
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
MITREへのリンク →

Dragonfly

Score: 0.62
Matched TTPs:
  • T1598.002 - Spearphishing Attachment
  • T1566.001 - Spearphishing Attachment
  • T1221 - Template Injection
  • T1195.002 - Compromise Software Supply Chain
  • T1598.003 - Spearphishing Link
MITREへのリンク →

ZIRCONIUM

Score: 0.59
Matched TTPs:
  • T1566.002 - Spearphishing Link
  • T1036 - Masquerading
  • T1036.004 - Masquerade Task or Service
  • T1598 - Phishing for Information
  • T1598.003 - Spearphishing Link
MITREへのリンク →

APT32

Score: 0.58
Matched TTPs:
  • T1566.001 - Spearphishing Attachment
  • T1036 - Masquerading
  • T1036.004 - Masquerade Task or Service
  • T1218.010 - Regsvr32
  • T1566.002 - Spearphishing Link
  • T1598.003 - Spearphishing Link
MITREへのリンク →

Related CVEs

このPulseに見つかったCVEはありません。

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