General

  • Target

    DonioExternalBetaTesting.exe

  • Size

    21.6MB

  • Sample

    240512-rcz26acf99

  • MD5

    8b83b1b0b50756804e0f08c9f3b1b8f7

  • SHA1

    85c32f26ae0e3f04b27bd6718919703aea5543ff

  • SHA256

    1abbb40a23b96d43508ea9414e619e4affc2c2754e8867ce1d7778102639fdc0

  • SHA512

    fac6eb15c691367ef0d67bdd12bc56874c62a87ffdc7b4f6811cb278e432180e4900d6965cb349f1edf3b29f8415506f2c4bf5cd580a309641b525bddcd0ebd9

  • SSDEEP

    393216:b6OqvaxDwIev2jgHvRaWP3xql2s0fdmMsx/pPeBAyYWzUrzShjiIPmF9PDpm:pJUUgPRaGUgfYMuRARzUHiji39PDpm

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

73.102.120.5:4782

Mutex

45cfb540-284b-48a7-9d2a-e359fc523739

Attributes
  • encryption_key

    70C79CE5F0635CE0445F6E268995D45A5188DFB3

  • install_name

    DonioExternalBeta.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WindowsUpdate

  • subdirectory

    WhitelistBeta

Targets

    • Target

      DonioExternalBetaTesting.exe

    • Size

      21.6MB

    • MD5

      8b83b1b0b50756804e0f08c9f3b1b8f7

    • SHA1

      85c32f26ae0e3f04b27bd6718919703aea5543ff

    • SHA256

      1abbb40a23b96d43508ea9414e619e4affc2c2754e8867ce1d7778102639fdc0

    • SHA512

      fac6eb15c691367ef0d67bdd12bc56874c62a87ffdc7b4f6811cb278e432180e4900d6965cb349f1edf3b29f8415506f2c4bf5cd580a309641b525bddcd0ebd9

    • SSDEEP

      393216:b6OqvaxDwIev2jgHvRaWP3xql2s0fdmMsx/pPeBAyYWzUrzShjiIPmF9PDpm:pJUUgPRaGUgfYMuRARzUHiji39PDpm

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Checks computer location settings

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

    • Drops startup file

    • 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.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v15

Tasks