General

  • Target

    bluemail.exe

  • Size

    1.6MB

  • Sample

    250204-nstzasvmez

  • MD5

    8df3fab98637bc32a59a5195ff453cab

  • SHA1

    fbbfefa642a2babf53461ea0a9a3651c3fcbb7f6

  • SHA256

    253902ece28a0b9e0a03441cbc0b72ebed093e27714b58a8bd95ccabde90edf0

  • SHA512

    4a4236fb5ed624d9642184d8ba1fd83027165b4dea52c2f74205a0da3c6d8e152c6cd3dddf1f3b0d509501b18a332232c94307d1ac97cf7abf9e5cdba1dc7ec2

  • SSDEEP

    49152:fIBW16KkCbCAcAGXnzR0Uzbt2/W2GmSA8EAp0m:fIM162CsGXnz6XGmSoK

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.montanasky.us
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    jsg11854

Extracted

Family

systembc

C2

wodresomdaymomentum.org

Targets

    • Target

      bluemail.exe

    • Size

      1.6MB

    • MD5

      8df3fab98637bc32a59a5195ff453cab

    • SHA1

      fbbfefa642a2babf53461ea0a9a3651c3fcbb7f6

    • SHA256

      253902ece28a0b9e0a03441cbc0b72ebed093e27714b58a8bd95ccabde90edf0

    • SHA512

      4a4236fb5ed624d9642184d8ba1fd83027165b4dea52c2f74205a0da3c6d8e152c6cd3dddf1f3b0d509501b18a332232c94307d1ac97cf7abf9e5cdba1dc7ec2

    • SSDEEP

      49152:fIBW16KkCbCAcAGXnzR0Uzbt2/W2GmSA8EAp0m:fIM162CsGXnz6XGmSoK

    • SystemBC

      SystemBC is a proxy and remote administration tool first seen in 2019.

    • Systembc family

    • 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.

    • Executes dropped EXE

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks