General

  • Target

    applecleaner (1).exe

  • Size

    6.7MB

  • Sample

    250103-3l17cszjb1

  • MD5

    cad8354da177706b2d48dd9d0642d9f0

  • SHA1

    ea69a1e3cf00894543bb40f5ee4251439e3b2252

  • SHA256

    62fc499b88eeb0334509ede6bba0f67dcdce5eb7954e5cbd2adfaabc0e2d405e

  • SHA512

    f9dc85730ee4e729358a9acf3d5ace4aa146f16736dd368308c2feb4ee876d0a60b586907aa556ea357459eeb2c678451667ae4bb5dee3e94c2ca39719945f78

  • SSDEEP

    196608:3pm+PJQbtnYGscd8rQcDw9Le+3L+cES9SDI:3pm2MnYG96jR+3LM

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

retigga

C2

192.168.1.90:4782

Mutex

a44d3f31-890a-4898-b165-c2376c429bdc

Attributes
  • encryption_key

    44D22D01383E73D0D2E9F33669A5C563ECE6903D

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      applecleaner (1).exe

    • Size

      6.7MB

    • MD5

      cad8354da177706b2d48dd9d0642d9f0

    • SHA1

      ea69a1e3cf00894543bb40f5ee4251439e3b2252

    • SHA256

      62fc499b88eeb0334509ede6bba0f67dcdce5eb7954e5cbd2adfaabc0e2d405e

    • SHA512

      f9dc85730ee4e729358a9acf3d5ace4aa146f16736dd368308c2feb4ee876d0a60b586907aa556ea357459eeb2c678451667ae4bb5dee3e94c2ca39719945f78

    • SSDEEP

      196608:3pm+PJQbtnYGscd8rQcDw9Le+3L+cES9SDI:3pm2MnYG96jR+3LM

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Modifies Windows Firewall

    • 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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Checks whether UAC is enabled

    • Drops desktop.ini file(s)

    • Network Service Discovery

      Attempt to gather information on host's network.

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

    • Checks system information in the registry

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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks