General

  • Target

    7fcd90faf86392f69e354b1d557f531c467636d995be118cc1b9dd20acd66848.zip

  • Size

    6.0MB

  • Sample

    230321-rxshtaba97

  • MD5

    3bf4e2645bf6618f7d53ce27d79b4065

  • SHA1

    f7dca938bd5c2ca3bb4eb0604be2d6ad848228cd

  • SHA256

    b6622b4c8c25a9bab12f8f1fe2a0e648e62028cd93020df9b9a17a9c1b350824

  • SHA512

    0cae218e42ca32f7d2d2328d7a2f26d8caa8d699592634b255577b6ec57a857f2bf6f50b61a746a9c3327cc052c72af3e511c9be3899cbe87d084110d521714b

  • SSDEEP

    98304:QeKSoXsg0/D8+xB16HzM9PvivbZx4zHhXF0jzDFK/8D9II9/Aio:QX9WTvkHKvijZx4NF0vZK/8DN/Ab

Malware Config

Targets

    • Target

      7fcd90faf86392f69e354b1d557f531c467636d995be118cc1b9dd20acd66848.exe

    • Size

      6.3MB

    • MD5

      b9d635f3b9813943221249aa312ec50d

    • SHA1

      27774bbdb9cc9d2f026533c3c36eee06d4d7908e

    • SHA256

      7fcd90faf86392f69e354b1d557f531c467636d995be118cc1b9dd20acd66848

    • SHA512

      a99ebfccd7b718e0e738a84fbedd5ce9003f2ceb38ca82604516459a143affe3851f24e6303013ad896f1ece0579a89aefce8aca5e5f4bb9e0cf657ddb8d1d48

    • SSDEEP

      196608:sxeUbegYe8hMuBHvNoLlG3g/5v1w+P6X+:seUbe5hVvyLHhv36X

    • 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

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Maps connected drives based on registry

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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

6
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

6
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

2
T1005

Tasks