General

  • Target

    NEXU$.exe

  • Size

    27.7MB

  • Sample

    240506-lrzr2sgb5s

  • MD5

    9f7d0bfe3985c340f42f039fbf9c52af

  • SHA1

    8769d102239db1f9befeaa67b25a7c12ea9ccf2b

  • SHA256

    bf782827fee0c2350eef32b486f7750a530d0e253187f85dd6b52af0b30c8a85

  • SHA512

    988f00c929d7d01b887dc511e586cc75a14180b8b65f34cc293bb998174b667cd488d4e4fc777c183f0c29c744cf649fa520f7265e13486226f3f074cdaf3f81

  • SSDEEP

    786432:TBvc42en9y+aJtShY9Q6SZKb0SReIMrRRMVb:T+cUSG8Zw09YVb

Malware Config

Targets

    • Target

      NEXU$.exe

    • Size

      27.7MB

    • MD5

      9f7d0bfe3985c340f42f039fbf9c52af

    • SHA1

      8769d102239db1f9befeaa67b25a7c12ea9ccf2b

    • SHA256

      bf782827fee0c2350eef32b486f7750a530d0e253187f85dd6b52af0b30c8a85

    • SHA512

      988f00c929d7d01b887dc511e586cc75a14180b8b65f34cc293bb998174b667cd488d4e4fc777c183f0c29c744cf649fa520f7265e13486226f3f074cdaf3f81

    • SSDEEP

      786432:TBvc42en9y+aJtShY9Q6SZKb0SReIMrRRMVb:T+cUSG8Zw09YVb

    • 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.

    • Deletes itself

    • 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.

    • Checks whether UAC is enabled

    • 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

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

5
T1082

Peripheral Device Discovery

1
T1120

Command and Control

Web Service

1
T1102

Tasks