General

  • Target

    41052dd1d4bceddb8765359ef8e1f319fed55ce6c427e47f7eddebaf740ac97dexeexe_JC.exe

  • Size

    6.1MB

  • Sample

    230813-le6d3aac99

  • MD5

    2e05358b2c35a5279467c6780ae16c68

  • SHA1

    833537db4ed37ebdf490d4085e236333ba36ffb0

  • SHA256

    41052dd1d4bceddb8765359ef8e1f319fed55ce6c427e47f7eddebaf740ac97d

  • SHA512

    be9563c965ea01eca523e806fc9e69a4a0e6cecfe653e04b6deadda046d57fa9bfa766bfe6086bfb800fcaab8b99c71330cd342eaa2bb938d60c07b84763421e

  • SSDEEP

    98304:9lvGIat2c2MyIfL50dC0R+1VlR88ZBgTCh1m4V/:9lvG1FyIT5lmqeT+r

Malware Config

Extracted

Family

redline

Botnet

KMSpico-Ad

C2

107.189.13.48:41805

Attributes
  • auth_value

    6ac304450f04a28ca3b5bc80d4f05224

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Adware 1.1

C2

proxy-29837846723.com:80

Mutex

ewmh50NpQc3nWUoNTl

Attributes
  • encryption_key

    1lTgL3je84LTD6QrtS40

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    30000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      41052dd1d4bceddb8765359ef8e1f319fed55ce6c427e47f7eddebaf740ac97dexeexe_JC.exe

    • Size

      6.1MB

    • MD5

      2e05358b2c35a5279467c6780ae16c68

    • SHA1

      833537db4ed37ebdf490d4085e236333ba36ffb0

    • SHA256

      41052dd1d4bceddb8765359ef8e1f319fed55ce6c427e47f7eddebaf740ac97d

    • SHA512

      be9563c965ea01eca523e806fc9e69a4a0e6cecfe653e04b6deadda046d57fa9bfa766bfe6086bfb800fcaab8b99c71330cd342eaa2bb938d60c07b84763421e

    • SSDEEP

      98304:9lvGIat2c2MyIfL50dC0R+1VlR88ZBgTCh1m4V/:9lvG1FyIT5lmqeT+r

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Modifies Windows Defender Real-time Protection settings

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • RedLine

      RedLine Stealer is a malware family written in C#, first appearing in early 2020.

    • XpertRAT

      XpertRAT is a remote access trojan with various capabilities.

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • XMRig Miner payload

    • Creates new service(s)

    • Drops startup file

    • 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.

    • Uses the VBS compiler for execution

    • Windows security modification

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks