General

  • Target

    XC.exe

  • Size

    7.5MB

  • Sample

    240416-bl9d7afd7w

  • MD5

    b821d6b60c41d12fc8c19b60e94c7bff

  • SHA1

    09d4d44e8e3b579fde868cdc652b8bce12eff224

  • SHA256

    6ccdf68389c578e9cac7656e7176259f5c7baa8faca69a91786249ea83ed0fc2

  • SHA512

    3864612c757f4d007c2abb05ad7b1848b7dd674a7c20106a581353a32e9c4b362942736fadaea1eb43a01bfc8b224f12b6969edf4955db71c687cfffc6c5e545

  • SSDEEP

    196608:LdgdKsWg3w2QsCYKXXvXqBH2ADg66+AFwxQ:wA2pCYYXSgUIBwxQ

Malware Config

Targets

    • Target

      XC.exe

    • Size

      7.5MB

    • MD5

      b821d6b60c41d12fc8c19b60e94c7bff

    • SHA1

      09d4d44e8e3b579fde868cdc652b8bce12eff224

    • SHA256

      6ccdf68389c578e9cac7656e7176259f5c7baa8faca69a91786249ea83ed0fc2

    • SHA512

      3864612c757f4d007c2abb05ad7b1848b7dd674a7c20106a581353a32e9c4b362942736fadaea1eb43a01bfc8b224f12b6969edf4955db71c687cfffc6c5e545

    • SSDEEP

      196608:LdgdKsWg3w2QsCYKXXvXqBH2ADg66+AFwxQ:wA2pCYYXSgUIBwxQ

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • UAC bypass

    • 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.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • 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.

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

2
T1112

Virtualization/Sandbox Evasion

1
T1497

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Tasks