General

  • Target

    VerifiedAssetLinked.exe

  • Size

    3.2MB

  • Sample

    250326-wa9k2azvdw

  • MD5

    e8ecf83250f2badd7aa0c240fdc7be04

  • SHA1

    23081fbff25cb90abfaa3f6c80d3ae79dbaf6fdb

  • SHA256

    adb07f246886c9b3923cb565463a66cc3e69f16982dd513669d09b5285ac5cfa

  • SHA512

    aeebeb2f787303a8ea5594fd94e7c8002b8dd9eb6dd01bea001a6540c96954359d8fc2e4a596108256d197ef06bebca367900e388882e17ab134c2e8ec595140

  • SSDEEP

    49152:uXMWUmXsmnc6gB5LCeVYc5qwKQaUW6KfR3kVmqEze6ylTfKb8ExP0abZAGU3uXfp:kzTc6gBFi6aL7i1serlrK10EpU3uW

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

84.67.89.127:4782

Mutex

40b84850-9991-4b2c-a985-76db9b77d6fe

Attributes
  • encryption_key

    24D2D4587F63E088D81748782350D3C2EF08E8BC

  • install_name

    SystemRuntimes.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    DisplayRuntimes

  • subdirectory

    SubDir

Extracted

Family

xworm

Version

5.0

C2

84.67.89.127:7000

Mutex

i0Qt3kYCfooW9ohR

Attributes
  • Install_directory

    %AppData%

  • install_file

    System.exe

aes.plain

Targets

    • Target

      VerifiedAssetLinked.exe

    • Size

      3.2MB

    • MD5

      e8ecf83250f2badd7aa0c240fdc7be04

    • SHA1

      23081fbff25cb90abfaa3f6c80d3ae79dbaf6fdb

    • SHA256

      adb07f246886c9b3923cb565463a66cc3e69f16982dd513669d09b5285ac5cfa

    • SHA512

      aeebeb2f787303a8ea5594fd94e7c8002b8dd9eb6dd01bea001a6540c96954359d8fc2e4a596108256d197ef06bebca367900e388882e17ab134c2e8ec595140

    • SSDEEP

      49152:uXMWUmXsmnc6gB5LCeVYc5qwKQaUW6KfR3kVmqEze6ylTfKb8ExP0abZAGU3uXfp:kzTc6gBFi6aL7i1serlrK10EpU3uW

    • Detect Xworm Payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Checks computer location settings

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

    • Executes dropped EXE

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks