Resubmissions

21-04-2024 23:00

240421-2y8ljacd95 10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    21-04-2024 23:00

General

  • Target

    ChappoSpoofer.exe

  • Size

    3.1MB

  • MD5

    de96227eb0709f5bb30dde675b9e6dc4

  • SHA1

    7f3aafdce9b7dd050630e801e8e5b76a95b5e336

  • SHA256

    993278405cabf3bb46e69f5784dacc4ac68ed04b5af84de962e15af2b9561618

  • SHA512

    a3b8df5efe2015bef35f7bdedc03b4c807e58241e057437d897bb1e3ca73e2fb46e68a65c8db3dfc24697851842677b0d88e58854d97345069e235fe3c68745e

  • SSDEEP

    49152:fvClL26AaNeWgPhlmVqvMQ7XSKc6DiEQs2kCxSLoGGfTHHB72eh2NT7:fv6L26AaNeWgPhlmVqkQ7XSKc6Dec

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.137.178:4782

Mutex

8d2015a7-d791-4873-bbd6-4c909ace97fb

Attributes
  • encryption_key

    078EC3386276E19F98076915A82DEE6A83AA8AFE

  • install_name

    ChappoSpoofer.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Creates scheduled task(s) 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\ChappoSpoofer.exe
    "C:\Users\Admin\AppData\Local\Temp\ChappoSpoofer.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2960
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\ChappoSpoofer.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:2372
    • C:\Users\Admin\AppData\Roaming\SubDir\ChappoSpoofer.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\ChappoSpoofer.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:2024
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\ChappoSpoofer.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2660

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3.1MB

    MD5

    de96227eb0709f5bb30dde675b9e6dc4

    SHA1

    7f3aafdce9b7dd050630e801e8e5b76a95b5e336

    SHA256

    993278405cabf3bb46e69f5784dacc4ac68ed04b5af84de962e15af2b9561618

    SHA512

    a3b8df5efe2015bef35f7bdedc03b4c807e58241e057437d897bb1e3ca73e2fb46e68a65c8db3dfc24697851842677b0d88e58854d97345069e235fe3c68745e

  • memory/2024-8-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

    Filesize

    9.9MB

  • memory/2024-10-0x0000000001200000-0x000000000152C000-memory.dmp

    Filesize

    3.2MB

  • memory/2024-11-0x000000001B290000-0x000000001B310000-memory.dmp

    Filesize

    512KB

  • memory/2024-12-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

    Filesize

    9.9MB

  • memory/2024-13-0x000000001B290000-0x000000001B310000-memory.dmp

    Filesize

    512KB

  • memory/2960-0-0x0000000001140000-0x000000000146C000-memory.dmp

    Filesize

    3.2MB

  • memory/2960-1-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

    Filesize

    9.9MB

  • memory/2960-2-0x000000001B420000-0x000000001B4A0000-memory.dmp

    Filesize

    512KB

  • memory/2960-9-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

    Filesize

    9.9MB