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Analysis

  • max time kernel
    20s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/12/2023, 20:12

General

  • Target

    02aff8a0e8287ee355078628552f8d17.exe

  • Size

    125KB

  • MD5

    02aff8a0e8287ee355078628552f8d17

  • SHA1

    b4320e173d70d9981f53f8d71266669bf14be113

  • SHA256

    e76dbfbe1231eb5abc752dcf27a798330a9b63dbf092b81f399696317c5e1f08

  • SHA512

    bf1dbed2defe4f48681cda52cba31220629efff8955450db1d48195ed4a969d8f688bc3c689677da394bc544b81dc8a3569bd157555a5a89a5ec37d1b178d99f

  • SSDEEP

    3072:4m3ugUOB7ZSBYfkVoFdRrqo0aRaA/HF673+UWHIfrIRDUk:H304NkVsuaRaU6mHGqDn

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 3 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\02aff8a0e8287ee355078628552f8d17.exe
    "C:\Users\Admin\AppData\Local\Temp\02aff8a0e8287ee355078628552f8d17.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4776
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 /s C:\Windows\system32\MSWINSCK.OCX
      2⤵
      • Loads dropped DLL
      • Modifies registry class
      PID:4876
    • C:\Windows\SysWOW64\attrib.exe
      attrib +S +H C:\Windows\system32\MSWINSCK.OCX
      2⤵
      • Sets file to hidden
      • Drops file in System32 directory
      • Views/modifies file attributes
      PID:2412
    • C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram program =C:\WINDOWS\Cursors\lsass.exename = WinUpdate = ENABLE
      2⤵
      • Modifies Windows Firewall
      PID:2820
    • C:\WINDOWS\Cursors\lsass.exe
      C:\WINDOWS\Cursors\lsass.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of SetWindowsHookEx
      PID:1128
    • C:\Windows\SysWOW64\attrib.exe
      attrib +h C:\WINDOWS\Cursors\lsass.exe
      2⤵
      • Drops file in Windows directory
      • Views/modifies file attributes
      PID:440

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\WINDOWS\Cursors\lsass.exe

    Filesize

    125KB

    MD5

    5a453a2ea63679da455b5c1c3da11253

    SHA1

    5ddef65c9bc1e29493f555708521fc13605db22f

    SHA256

    9766e8a92c92eb9963cf481734ec3d64d4e2e5018307d0601fabc25d7c4ad94e

    SHA512

    3eca01a0fb11456b4f7e1f54f1dd9e928b58277ee0f4186b65ebdc67c7796964f57d82c5be6175603f56dc4af67fee421174ddd38978eea9eaaa86d4e38539e2

  • C:\Windows\Cursors\lsass.exe

    Filesize

    1KB

    MD5

    e5b843b2b432156869e78472f0c8ecf2

    SHA1

    2d0fc1b445642517309997a3572cb850b40bab63

    SHA256

    21c0e53f94eb0210291e6f4d933a7107ed992d89f0c0ca5a07e556ef5766faed

    SHA512

    414695e62d48c44b85a27b55778339ea0b3918ef1c710ac0e2a9b6c4d28b2d5e1f91affd43ee6dd782fea9a485b78a24716e32c1b6a0f1c2a6687478443bf738

  • C:\Windows\SysWOW64\MSWINSCK.OCX

    Filesize

    105KB

    MD5

    9484c04258830aa3c2f2a70eb041414c

    SHA1

    b242a4fb0e9dcf14cb51dc36027baff9a79cb823

    SHA256

    bf7e47c16d7e1c0e88534f4ef95e09d0fd821ed1a06b0d95a389b35364b63ff5

    SHA512

    9d0e9f0d88594746ba41ea4a61a53498619eda596e12d8ec37d01cfe8ceb08be13e3727c83d630a6d9e6d03066f62444bb94ea5a0d2ed9d21a270e612db532a0

  • C:\Windows\SysWOW64\MSWINSCK.OCX

    Filesize

    20KB

    MD5

    bd95a7f994a9e1d4330c8ed05a68d1c5

    SHA1

    3498d18db1e6a1956f144228730e65ba28f80a36

    SHA256

    8794a60afb73520de033fb72989865f83d569079daaa56ba4a566286d2817797

    SHA512

    79152a0d77b3580fea37795f03736104840fde2b0a4870c64e108f3468500b54cf7fbb5c79dce871dc69cc99ba29dc9f62537bd380472ab528947d97c982e497

  • C:\Windows\SysWOW64\MSWINSCK.OCX

    Filesize

    54KB

    MD5

    fe612993666a6dde754f056dd6fab4a6

    SHA1

    ef0c1b20a57361b5606ee5b10b9e0a7bca38e0b3

    SHA256

    d46a619126b51167d7de573854bf2909abb1f544e37bf94b4fc375426f95963f

    SHA512

    212c407c062c5d7339d96ae4032df6af8a8f19165a5ec36941b1ea05cd75d7277808d546969521394cfc912b5460bc9f1b0f394d923767e28c76df4852d02db5

  • C:\Windows\SysWOW64\MSWINSCK.OCX

    Filesize

    96KB

    MD5

    9e73ae6a10f50fbf13ade14ec7a3e2b6

    SHA1

    78b0522a97b761761e764c462e95f0a0096292da

    SHA256

    1b902cc9f7070bae2d3a1396dcd458fcc80b47fcc9f1d423aa066e23463efe99

    SHA512

    73a65ff921cacd3c6dd8d848a6f0b47139ca614a91e45fa006c0c2ac08cf598f716b9e2f74e0b7e5bba09992bdde442a91ca36adb08b9b0d3ed8a2638d3e7d77

  • memory/1128-17-0x0000000000400000-0x0000000000447000-memory.dmp

    Filesize

    284KB

  • memory/4776-0-0x0000000000400000-0x0000000000447000-memory.dmp

    Filesize

    284KB

  • memory/4776-6-0x0000000000400000-0x0000000000447000-memory.dmp

    Filesize

    284KB

  • memory/4776-16-0x0000000000400000-0x0000000000447000-memory.dmp

    Filesize

    284KB