General

  • Target

    76195dea24952425594e7db7239ce0aa_JaffaCakes118

  • Size

    2.5MB

  • Sample

    240526-t2cdhade63

  • MD5

    76195dea24952425594e7db7239ce0aa

  • SHA1

    b9791aef3c83751b937f2b60fda094cecb8954a8

  • SHA256

    80e35297452f56d53068cfaa87d95cbb9af7f5a44c9db7b0a84f4a8ff83ebdaa

  • SHA512

    0cdce90ccffcd69dcf5cc1ff8f0ecfc55f16227b2f6e1141f80c5dfe4dddec71db097755d47715cc59ea4f10ef5c72598eef252f87e923adbac212a27bd90727

  • SSDEEP

    49152:WNx808T9CKJc5FwOTL6Xz0KlMJ+6NLptQx2UbdMM5Y2LWz:W4d9HxQuXzzMJ+65L12Lc

Malware Config

Extracted

Family

buer

C2

http://burload01.top/

http://burload02.top/

Targets

    • Target

      76195dea24952425594e7db7239ce0aa_JaffaCakes118

    • Size

      2.5MB

    • MD5

      76195dea24952425594e7db7239ce0aa

    • SHA1

      b9791aef3c83751b937f2b60fda094cecb8954a8

    • SHA256

      80e35297452f56d53068cfaa87d95cbb9af7f5a44c9db7b0a84f4a8ff83ebdaa

    • SHA512

      0cdce90ccffcd69dcf5cc1ff8f0ecfc55f16227b2f6e1141f80c5dfe4dddec71db097755d47715cc59ea4f10ef5c72598eef252f87e923adbac212a27bd90727

    • SSDEEP

      49152:WNx808T9CKJc5FwOTL6Xz0KlMJ+6NLptQx2UbdMM5Y2LWz:W4d9HxQuXzzMJ+65L12Lc

    • Buer

      Buer is a new modular loader first seen in August 2019.

    • Modifies WinLogon for persistence

    • Buer Loader

      Detects Buer loader in memory or disk.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Checks BIOS information in registry

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks