Analysis

  • max time kernel
    122s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20240611-en
  • resource tags

    arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
  • submitted
    15-06-2024 06:58

General

  • Target

    1.3.1.1002/LemonCalendar.exe

  • Size

    968KB

  • MD5

    6316d6cbb865715433fabb26ef40475c

  • SHA1

    26fe47aa5a8cba00724437f48ff2a945f6438388

  • SHA256

    e85fcae499aa5adb7655fb969faeeddfd29d533848c2bb024d3cd5cbdabb1800

  • SHA512

    8c199d0b84272a5604884895dbf48fe48ca3000d7a6010a51d1e65ad4f708e733077453c61ea11dc2cf16ea1f552feb86468d1ff3cc5feea1aae75084fd93587

  • SSDEEP

    12288:8GMJPzFmrIyaAn+FJqbtMGapym5mWaaj6jIRnA3CKvFmdY8/riVjcP55CI7kqhpf:8Tx3Ak6KUm5gSRorX4bCI7kG4J7Y

Score
6/10

Malware Config

Signatures

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of FindShellTrayWindow 8 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1.3.1.1002\LemonCalendar.exe
    "C:\Users\Admin\AppData\Local\Temp\1.3.1.1002\LemonCalendar.exe"
    1⤵
    • Adds Run key to start application
    • Writes to the Master Boot Record (MBR)
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2436
    • C:\Users\Admin\AppData\Local\Temp\1.3.1.1002\RunningHelper64.exe
      "C:\Users\Admin\AppData\Local\Temp\1.3.1.1002\RunningHelper64.exe" /dll_launch=Install_Force
      2⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      PID:2216

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2436-0-0x0000000002C90000-0x0000000002C91000-memory.dmp
    Filesize

    4KB