General

  • Target

    Microsoft-Office-Pro_AXUdx5sk.exe

  • Size

    3.5MB

  • Sample

    230323-xss7fahf34

  • MD5

    793c091d621ab270b4d7d8993a524ed4

  • SHA1

    a71ba72c3806a01342fdbd5d44eef61394d4070e

  • SHA256

    b13eb5dae6302c922ea00378babc97b214e90cf6e2e0b37e67fd6b82c4b38db9

  • SHA512

    f35d79a0ac8a29669672de82b8cbe90a9d80735dd99b4b72817ce9a7f5b8a21c58e9f79e95f87f8259ec607921d23e266744611b7ae386c4f54ef4de0dbb4d38

  • SSDEEP

    98304:LOhfS5oFTjvvhWUPrJC9DRczor/PgTyCMQmR8Ud12Fohv:yhfhTjv5jrJaDRUsoR+s6v

Malware Config

Extracted

Family

gcleaner

C2

85.31.45.39

85.31.45.250

85.31.45.251

85.31.45.88

Targets

    • Target

      Microsoft-Office-Pro_AXUdx5sk.exe

    • Size

      3.5MB

    • MD5

      793c091d621ab270b4d7d8993a524ed4

    • SHA1

      a71ba72c3806a01342fdbd5d44eef61394d4070e

    • SHA256

      b13eb5dae6302c922ea00378babc97b214e90cf6e2e0b37e67fd6b82c4b38db9

    • SHA512

      f35d79a0ac8a29669672de82b8cbe90a9d80735dd99b4b72817ce9a7f5b8a21c58e9f79e95f87f8259ec607921d23e266744611b7ae386c4f54ef4de0dbb4d38

    • SSDEEP

      98304:LOhfS5oFTjvvhWUPrJC9DRczor/PgTyCMQmR8Ud12Fohv:yhfhTjv5jrJaDRUsoR+s6v

    • GCleaner

      GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.

    • Modifies Windows Defender Real-time Protection settings

    • Windows security bypass

    • Downloads MZ/PE file

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • 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.

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v6

Tasks