General

  • Target

    r4.msi

  • Size

    4.2MB

  • Sample

    230317-ezwxssec23

  • MD5

    72f7a880209c875d48c153b5b8db71f9

  • SHA1

    f861232236ddcd2df75dfe77c7ba5342b84bf777

  • SHA256

    b1bae0bca6cef482524586746abfda822829edad434a164cf764eb34c15736a6

  • SHA512

    fe9c4f18ac24f89aac02dcc372a65c9d611c3d4755fdd060ae50d79228192b788fca61aef6776b0aa4576d5f124de77ec2b7a790bd2d87099ac357e165ddaac9

  • SSDEEP

    98304:PPKnw39kiUnMUYeg8F1HWMUKFln1EJCl1ZPYzrkFE:6wNJUnMUYetUKFZ+CFPY0F

Malware Config

Extracted

Family

bumblebee

rc4.plain

Extracted

Family

bumblebee

Botnet

cis21503

C2

194.135.33.90:443

45.66.248.64:443

107.189.1.219:443

rc4.plain

Targets

    • Target

      r4.msi

    • Size

      4.2MB

    • MD5

      72f7a880209c875d48c153b5b8db71f9

    • SHA1

      f861232236ddcd2df75dfe77c7ba5342b84bf777

    • SHA256

      b1bae0bca6cef482524586746abfda822829edad434a164cf764eb34c15736a6

    • SHA512

      fe9c4f18ac24f89aac02dcc372a65c9d611c3d4755fdd060ae50d79228192b788fca61aef6776b0aa4576d5f124de77ec2b7a790bd2d87099ac357e165ddaac9

    • SSDEEP

      98304:PPKnw39kiUnMUYeg8F1HWMUKFln1EJCl1ZPYzrkFE:6wNJUnMUYetUKFZ+CFPY0F

    • BumbleBee

      BumbleBee is a webshell malware written in C++.

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Loads dropped DLL

    • Enumerates connected drives

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

    • Suspicious use of NtCreateThreadExHideFromDebugger

MITRE ATT&CK Enterprise v6

Tasks