General

  • Target

    krnl_beta.exe

  • Size

    1.8MB

  • Sample

    230331-yr9ngada56

  • MD5

    3701dc535fb395d6a1fb557a3aeec5e9

  • SHA1

    ef517659229ddc6ecfc02481c3953ac9322dae35

  • SHA256

    ec6df713446a8dd5efb376fbb7b444ed7e09f5cdd98c0494999b64af2e2d5537

  • SHA512

    20dc14387138f913034bd2c265156dca1f36c128c040a99d6904fe6f1830d2f98afb3dcf0553817adb66e480be7d0fb0d7df58f0feb9b007a5a6bab648b081a2

  • SSDEEP

    49152:+P1uB0SVp4+KSxyrRUzS65+x+rnxYr9PC:+Pk0ST4+RgRUzS65+x1ZPC

Malware Config

Targets

    • Target

      krnl_beta.exe

    • Size

      1.8MB

    • MD5

      3701dc535fb395d6a1fb557a3aeec5e9

    • SHA1

      ef517659229ddc6ecfc02481c3953ac9322dae35

    • SHA256

      ec6df713446a8dd5efb376fbb7b444ed7e09f5cdd98c0494999b64af2e2d5537

    • SHA512

      20dc14387138f913034bd2c265156dca1f36c128c040a99d6904fe6f1830d2f98afb3dcf0553817adb66e480be7d0fb0d7df58f0feb9b007a5a6bab648b081a2

    • SSDEEP

      49152:+P1uB0SVp4+KSxyrRUzS65+x+rnxYr9PC:+Pk0ST4+RgRUzS65+x1ZPC

    • Lumma Stealer

      An infostealer written in C++ first seen in August 2022.

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Creates a large amount of network flows

      This may indicate a network scan to discover remotely running services.

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

5
T1012

System Information Discovery

6
T1082

Network Service Scanning

1
T1046

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Tasks