General

  • Target

    https://mega.nz/file/BjsW0Q5K#C_FDyUmglUvXk1wIwpO7_eyHfrcy8COtNBI7YaRFxac

  • Sample

    240515-a5zteshc45

Malware Config

Targets

    • Target

      https://mega.nz/file/BjsW0Q5K#C_FDyUmglUvXk1wIwpO7_eyHfrcy8COtNBI7YaRFxac

    • 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.

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Command and Control

Web Service

1
T1102

Tasks