Overview

overview

10

Static

static

1

123.exe

windows10-2004-x64

10

Sharing

Copy URL Twitter E-mail

General

  • Target

    123.exe

  • Size

    4KB

  • Sample

    230420-z4ejjaec8z

  • MD5

    8518a12eed11929f90e15e3be93e46a0

  • SHA1

    5e36792391b34ba7f1e7d410f5497a1581c9f541

  • SHA256

    41139316deb7d9a54b18b8c19e9171bda3cb604c3e750f6e85d7ceb1cde0e345

  • SHA512

    a16ba972c2c49c96a27acbc1caa2fae2129b16c0cc59b17a69e21909715ca6d82ad6e50ff2f3b690aa30b5e5a0cf10e21dc892428f55f923368fb58438881ed1

  • SSDEEP

    96:xEPd8q5POp1OTqS6Y83w60w0wod3oj0rl:aPuq5POp1OTqpY8BodX

Score
10/10
quasaruserevasionspywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

user

C2

bore.pub:3434

Mutex

dea7d3ac-9cbe-4676-9d9b-fbb7abd72f66

Attributes
  • encryption_key

    750E471A2736E4EC77FD37E3C73FCB548A7C773A

  • install_name

    csrss.exe

  • log_directory

    Logs

  • reconnect_delay

    10

  • startup_key

    Client Server Runtime Process

  • subdirectory

    F2D1CC.tmp

Targets

    • Target

      123.exe

    • Size

      4KB

    • MD5

      8518a12eed11929f90e15e3be93e46a0

    • SHA1

      5e36792391b34ba7f1e7d410f5497a1581c9f541

    • SHA256

      41139316deb7d9a54b18b8c19e9171bda3cb604c3e750f6e85d7ceb1cde0e345

    • SHA512

      a16ba972c2c49c96a27acbc1caa2fae2129b16c0cc59b17a69e21909715ca6d82ad6e50ff2f3b690aa30b5e5a0cf10e21dc892428f55f923368fb58438881ed1

    • SSDEEP

      96:xEPd8q5POp1OTqS6Y83w60w0wod3oj0rl:aPuq5POp1OTqpY8BodX

    Score
    10/10
    quasaruserevasionspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

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

      evasion

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • 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.

    • Executes dropped EXE

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

      evasion

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1

MITRE ATT&CK Enterprise v6

Tasks