General

  • Target

    Rebuffed.exe

  • Size

    1.2MB

  • Sample

    231012-h4e2madd7w

  • MD5

    4f56cd3f66574df8c5d4969a7a731832

  • SHA1

    790d9b9d9dd45ae834139158a993721ab74ac3f4

  • SHA256

    15c55fd5158febe95f1e54f73a9388e77b1974d6983d6fad4c7dac8961ce71bb

  • SHA512

    fce4942401bd50931bc28e51f071764f7107c3094aa8dfe3125bed66f55f7361e2c7b6174fcdb6b68c6fb5ec3d47af4f2f3402619eb7e8768ed150812dd9a070

  • SSDEEP

    24576:2RYkWmWEPOh5Wr++qiOKpTnDeSsp1jQW3GwiAtsp1kt4KdAZJO3FqdPH5oUPhZ:8YoW3WrtsKpTYpyW3GwY6tMqOz3

Score
10/10

Malware Config

Targets

    • Target

      Rebuffed.exe

    • Size

      1.2MB

    • MD5

      4f56cd3f66574df8c5d4969a7a731832

    • SHA1

      790d9b9d9dd45ae834139158a993721ab74ac3f4

    • SHA256

      15c55fd5158febe95f1e54f73a9388e77b1974d6983d6fad4c7dac8961ce71bb

    • SHA512

      fce4942401bd50931bc28e51f071764f7107c3094aa8dfe3125bed66f55f7361e2c7b6174fcdb6b68c6fb5ec3d47af4f2f3402619eb7e8768ed150812dd9a070

    • SSDEEP

      24576:2RYkWmWEPOh5Wr++qiOKpTnDeSsp1jQW3GwiAtsp1kt4KdAZJO3FqdPH5oUPhZ:8YoW3WrtsKpTYpyW3GwY6tMqOz3

    Score
    10/10
    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

    • Checks QEMU agent file

      Checks presence of QEMU agent, possibly to detect virtualization.

    • Checks computer location settings

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

    • Loads dropped DLL

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks