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Analysis

  • max time kernel
    71s
  • max time network
    74s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/02/2024, 00:43

General

  • Target

    microsoft office 2007 service pack 2.exe

  • Size

    174KB

  • MD5

    223977bfe475775f06a35f006aa81711

  • SHA1

    699c517c943fa31fd70ebc342c94ec8cc3ed62ad

  • SHA256

    0d8f1efd9e5617db2d6c9534b571818e7bcd58a1ccf0e365a9c0628dee63dcde

  • SHA512

    7ba04a442401e043729c3d91869a5a8b7e272b99d8814f016b0d9863f12b7d91f37d98c7ac37ad9fe56efce67b6ba12008f9ef475936e1ccdb02447c6c0577f6

  • SSDEEP

    3072:snOn7t7XpdpCCTg/sxFgJDjJCyOOZcjgMPbqXAp3bW/8zDdKtqtvEi0VbeOPr2U:sKpdcCrTqoZOZczpLWUFQjjbeA

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\microsoft office 2007 service pack 2.exe
    "C:\Users\Admin\AppData\Local\Temp\microsoft office 2007 service pack 2.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:3224
    • C:\Users\Admin\AppData\Local\Temp\nss3376.tmp\northstar.exe
      C:\Users\Admin\AppData\Local\Temp\nss3376.tmp\northstar.exe /u4dc9054e-38b0-4614-bdd5-20605bc06f26 /e2604885 /dT201212271515
      2⤵
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Drops file in Windows directory
      • Modifies system certificate store
      • Suspicious use of SetWindowsHookEx
      PID:2616

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\nss3376.tmp\System.dll

    Filesize

    21KB

    MD5

    5ebc73650256e9c8ddbcda231db829a1

    SHA1

    988d4535e18754ab2a6248abae96c5697d7dbcd5

    SHA256

    1eaa543842df7795404184e8892a1654b0773dbc9bd8b54c7fdb9e68f4355493

    SHA512

    b21266e76fc7263af982a1336a766e47ccf348ed56b305dbb09f03574c9b2a7309f12200e80d86f9a251381be6e87a41206447f11c51899cb31fba10da1d5270

  • C:\Users\Admin\AppData\Local\Temp\nss3376.tmp\northstar.exe

    Filesize

    275KB

    MD5

    a1e2472db630c7043c2fb486a17300bc

    SHA1

    f289644ce703d4050b49ec0606c543a8f3928624

    SHA256

    0e990e290a6c3b4b3a3ac7495bfc197b698799ae840a06586eb5d5cbe74a1bd7

    SHA512

    3571478424b464b17ef58f43ffca57e09e539e4b83ed1a158694ab4f473001ceb37cb72c850d701767625d515f129a14a1f60446ace745517658923467b01823

  • memory/2616-13-0x0000000074C80000-0x0000000075231000-memory.dmp

    Filesize

    5.7MB

  • memory/2616-14-0x0000000074C80000-0x0000000075231000-memory.dmp

    Filesize

    5.7MB

  • memory/2616-15-0x0000000000E30000-0x0000000000E40000-memory.dmp

    Filesize

    64KB

  • memory/2616-26-0x0000000000E30000-0x0000000000E40000-memory.dmp

    Filesize

    64KB

  • memory/2616-27-0x0000000000E30000-0x0000000000E40000-memory.dmp

    Filesize

    64KB

  • memory/2616-29-0x0000000074C80000-0x0000000075231000-memory.dmp

    Filesize

    5.7MB

  • memory/3224-33-0x0000000000400000-0x000000000043E000-memory.dmp

    Filesize

    248KB