General

  • Target

    krnl_beta.exe

  • Size

    1.8MB

  • Sample

    230312-ytbjfsfc22

  • 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

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Zloader, Terdot, DELoader, ZeusSphinx

      Zloader is a malware strain that was initially discovered back in August 2015.

    • 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

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Detected potential entity reuse from brand microsoft.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

7
T1012

System Information Discovery

7
T1082

Peripheral Device Discovery

2
T1120

Collection

Data from Local System

1
T1005

Tasks