Resubmissions

21-04-2024 23:00

240421-2y8ljacd95 10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-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 2 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 6 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:1168
    • 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:4728
    • 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:3224
      • 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:1556
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4904

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\ChappoSpoofer.exe.log

      Filesize

      1KB

      MD5

      baf55b95da4a601229647f25dad12878

      SHA1

      abc16954ebfd213733c4493fc1910164d825cac8

      SHA256

      ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

      SHA512

      24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

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

      Filesize

      3.1MB

      MD5

      de96227eb0709f5bb30dde675b9e6dc4

      SHA1

      7f3aafdce9b7dd050630e801e8e5b76a95b5e336

      SHA256

      993278405cabf3bb46e69f5784dacc4ac68ed04b5af84de962e15af2b9561618

      SHA512

      a3b8df5efe2015bef35f7bdedc03b4c807e58241e057437d897bb1e3ca73e2fb46e68a65c8db3dfc24697851842677b0d88e58854d97345069e235fe3c68745e

    • memory/1168-2-0x000000001B1E0000-0x000000001B1F0000-memory.dmp

      Filesize

      64KB

    • memory/1168-0-0x00000000000E0000-0x000000000040C000-memory.dmp

      Filesize

      3.2MB

    • memory/1168-10-0x00007FF9B2C80000-0x00007FF9B3741000-memory.dmp

      Filesize

      10.8MB

    • memory/1168-1-0x00007FF9B2C80000-0x00007FF9B3741000-memory.dmp

      Filesize

      10.8MB

    • memory/3224-11-0x00007FF9B2C80000-0x00007FF9B3741000-memory.dmp

      Filesize

      10.8MB

    • memory/3224-12-0x0000000002CC0000-0x0000000002CD0000-memory.dmp

      Filesize

      64KB

    • memory/3224-13-0x000000001C1A0000-0x000000001C1F0000-memory.dmp

      Filesize

      320KB

    • memory/3224-14-0x000000001C2B0000-0x000000001C362000-memory.dmp

      Filesize

      712KB

    • memory/3224-15-0x00007FF9B2C80000-0x00007FF9B3741000-memory.dmp

      Filesize

      10.8MB

    • memory/3224-16-0x0000000002CC0000-0x0000000002CD0000-memory.dmp

      Filesize

      64KB

    • memory/3224-17-0x000000001CBE0000-0x000000001D108000-memory.dmp

      Filesize

      5.2MB