Analysis

  • max time kernel
    125s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    03-08-2024 05:04

General

  • Target

    Venom.exe

  • Size

    3.1MB

  • MD5

    1348632fc2ede08cab5db1cb174ff0d3

  • SHA1

    2a1966291aa0e7aee1b039a1a75fa4879489a2be

  • SHA256

    900cb76890979aa50347b7b929ef1babd7c677966f642aa4d74cf973136a48bf

  • SHA512

    52f68303d71f1293b02784539ef3250a95cf9ef4cb868e26e381a86667ab4f5cfc5a36d462ff746dc021bc0420cf8f0b31b050ec4142fb1be4b8f626fae39edb

  • SSDEEP

    49152:avht62XlaSFNWPjljiFa2RoUYItFW7Bxn+oGdzTHHB72eh2NT:avL62XlaSFNWPjljiFXRoUYIrW2

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.246:4782

Mutex

1e9de725-2f46-4350-b6c8-78b3b776a085

Attributes
  • encryption_key

    ACF3D3BDCC7612495B863F26348AD4EE3B96458B

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    venom

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Venom.exe
    "C:\Users\Admin\AppData\Local\Temp\Venom.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2628
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "venom" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2108
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1808
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "venom" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2672

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

    Filesize

    3.1MB

    MD5

    1348632fc2ede08cab5db1cb174ff0d3

    SHA1

    2a1966291aa0e7aee1b039a1a75fa4879489a2be

    SHA256

    900cb76890979aa50347b7b929ef1babd7c677966f642aa4d74cf973136a48bf

    SHA512

    52f68303d71f1293b02784539ef3250a95cf9ef4cb868e26e381a86667ab4f5cfc5a36d462ff746dc021bc0420cf8f0b31b050ec4142fb1be4b8f626fae39edb

  • memory/1808-10-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

    Filesize

    9.9MB

  • memory/1808-11-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

    Filesize

    9.9MB

  • memory/1808-9-0x00000000010A0000-0x00000000013C4000-memory.dmp

    Filesize

    3.1MB

  • memory/1808-12-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

    Filesize

    9.9MB

  • memory/1808-13-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

    Filesize

    9.9MB

  • memory/2628-0-0x000007FEF5923000-0x000007FEF5924000-memory.dmp

    Filesize

    4KB

  • memory/2628-1-0x0000000000BC0000-0x0000000000EE4000-memory.dmp

    Filesize

    3.1MB

  • memory/2628-2-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

    Filesize

    9.9MB

  • memory/2628-8-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

    Filesize

    9.9MB